Hydraulics - Science topic

simple and good Msc research topic for Hydraulic engineering

I wand to do research project of Hydraulic Press, I need your help regarding and how can I conduct this research as I don't have much knowledge of research project.

I am confused on calculation of the hydraulic radius for channels where the sediment bury the channel and form a convex upwards cross section. Such condition resulted in multithread braided channel scenario with temporary wetted perimeter as the flow path keep on changing while braiding. I though of taking average depth as hydraulic radius but am confused on which section to take for such convex upwards sediment filled channels. Thank you

I am working on the design of the anaerobic baffled reactor for the treatment of dairy wastewater. I need assistance to determine the HRT and OLR for the reactor.

i have a project about this and i don't know exactly where i can find these hydraulic formulas.

How has the equations for the check valves been formulated to be Q_L=K_L(P_D-P_L) and Q_P=K_P(P_D-P_P)?

Hello,

In our laboratory we started restoration of tensile/compression hydraulic press (Fritz Heckert-EDZ100 ) and for this purpose we need to find documentation for it. Any documentation will be useful including operation manual, electrical scheme, hydraulic scheme, drawings, etc.

Best regards

Dear researchers,

I would like to know if there is a hydraulic press that can press a powder and also align grains with a magnetic field (this magnetic field can be switched on or off).

Please give me some details and I will be very thankful.

Best regards. 

1. For a given soil sample the following data were measured. During sample collection, water table was observed at a depth of 40 cm below the soil surface. Assume that the reference is placed at the water table. Based on this information and the one in the table, fill-in the missing values of component potentials and the total hydraulic head: 7 points

Depth (cm) Gravitational head (cm) Matric head(cm) Pressure head(cm) Hydraulic

head (H) cm)

0 -105

10 -50

20 -36

30 -22

40 0

50 0

60 0

70 0

Hello together,

I am working with a new ecohydrological model (medfate, available as a r-package) and stumbled upon the unit of mmol⋅s−1⋅m−1⋅MPa−1 for saturated soil conductivity. For my other models, I have soils that are already parameterized for their MvG values and hydraulic condunctivity, hoewever theresaturated soil conductivity is in cm/day. Can anyone advise me how to calculate between these units?

Best regards

Alexander

Can we share information about ancient hydrological knowledge, old hydraulic techniques, and ancestral water management methods

Hello, I wish to measure temperature dependent resistivity of ferromagnetic semiconductors which are prepared by thermal decomposition and are in powder form. Solid pellets of these are formed by using a hydraulic press. While I have equipment for the basic characterization, I am looking for to establish collaboration to measure temperature dependent resistivity of the samples. We are also fabricating superconductors and the collaboration will be established to that field also. Looking forward to replies.

Thanks

Azeem

Hello All! Why is it important to determine the coefficient of friction 𝜆 when determining hydraulic resistance? How important is it for the world to find a theoretical solution 𝜆 for a turbulent regime? Is there a Noble Prize for this?

In fluid mechanics, the theory of steady and uniform fluid motion does not allow such a flow in a horizontal channel. But such a flow is possible from the point of view of the theory of energy motion, which is interesting to me. The problem can be tested with a simple experiment. However, practice shows that laboratory flumes are usually made with a slope.

How the hydraulic design parameters determined, the operation and maintenance of spillway.

We are doing a research project on hydraulic turbines, the aim is to come up with a simple reaction hydraulic turbine. We came across Z-Blade turbine and would like to know how it works

I am searching for any software which can do analysis of soil stabilization when different Hydraulic and Non hydraulic binders are added to soil. I want to know the Bearing capacity affected and different failure criteria of soil using software.

Hydraulic retention time (HRT) is the average time a certain amount of wastewater stays in a holding tank before exiting the tank. But then what is the operating time?

Hi. I want to make measurements in a straight microchannel having an aspect ratio of (width/depth = 2.5) at very low Reynolds numbers (Re is in between 0.001 to 0.01). What should be the criteria for the hydraulic or the entrance length of the channel to obtain a fully developed flow?

I could not any articles at such low Re; any comments or suggestion or references to published research are highly appreciated.

I am struggling in finding the proper literature on the topic. please help me. Thank You.

I am reading a book and it is quite old. It says that when determining hydraulic the friction coefficient λ for the turbulent regime zone, no theoretical solution to the problem was found. Is it so today? And that for the transient mode (Re=2300....4000) it is not recommended to design pipelines. Is it possible to determine λ in this case only from reference books or field tests?

I am trying to make a Tungsten sputter target compact. First I am going to dry mill the Tungsten powder in a planetary ball and after milling addition of binder PVA and making a compact and annealing the compact in a tube furnace. But I have a doubt with the temperature at which the compact has to be annealed.

In anticline structure carbonate Reservoir of areal extension 31x10 km with 24 to26 degrees. no compartments. And no faces alteration (hydraulic continuty exist) multiple Downhole samples, MDT, and well testing samples were taken the bubble point ranging from 2140 psi in one flank to 2746 psi as average.

A question is if in a "normal soil" - never flooded the water pressure at zero or below.

May the soil water flows into the ceramic cup of a tensiometer?

I guess it is not possible because I do have always a hydraulic head inside the ceramic cup (if its filled of water).

Moreover, also in a situation where, momentaneously, water pressure is lower inside the ceramic cup (e.g after a strong rain in a dry period) than outside, it the pressure will be equilibrated quickly (i.e time response of tensiometer), and the hydraulic conductivity of the ceramic is too reduced to allow some identifiable flow.

Anyway - Maybe Im biased. If you do have any theoretical or practical ideas.

Please let me know.

Hello! I am setting up an experiment in a hydraulic flume with sediment recirculation. We have collected the sediments to be used from an estuary and are finding the bed preparation methods described commonly in the flume literature may need to be modified to work with these particular sediments. Many flume studies use uniform grain size distributions and the sediments do not contain OM. We have autoclaved and desalinated the sediments and sieved to <2 mm. The remaining distribution consists mainly of coarse to fine sands but with a nonuniform distribution including small but influential fractions of silt/clay. Additionally, the sediments contain ~8% OM. Does anyone have experience working with natural sediments in a flume or suggestions of good papers that describe flume set up with estuarine sediments? Many thanks!

Are there binders with pozzolanic and hydraulic properties?

What kind of hydraulic binders do you know besides cement?

Hello,

I've successfully simulated the closure of a flapper non-return valve as illustrated.

The inlet velocity increases gradually with a specific acceleration.

The following UDF is used to specify the motion of the flapper:

#include "udf.h"

DEFINE_SDOF_PROPERTIES(flappers_motion, sdof_prop, dt, time, dtime)

{

Six_DOF_Object *sdof_obj = NULL;

sdof_prop[SDOF_MASS] = 2.73e-3; /* flapper's submerged weight */

sdof_prop[SDOF_IXX] = 2161.86e-9; /* around the hinge */

sdof_prop[SDOF_IYY] = 367.96e-9;

sdof_prop[SDOF_IZZ] = 2471.27e-9;

real m= sdof_prop[SDOF_MASS];

real L= 0.024479 ;

sdof_prop[SDOF_LOAD_M_X] = 0 ;

sdof_prop[SDOF_LOAD_M_Y] = 0.0;

sdof_prop[SDOF_LOAD_M_Z] = 0.0;

real th_deg = theta * 180 * 7 / 22 ; /* valve opening angle, in degree */

sdof_obj = Get_SDOF_Object(DT_PU_NAME(dt));

if (NULLP(sdof_obj))

{

/* Allocate_SDOF_Object must be called with the same name as the udf */

sdof_obj = Allocate_SDOF_Object(DT_PU_NAME(dt));

SDOFO_1DOF_R_P(sdof_obj) = TRUE; /*1DOF rotation*/

SDOFO_DIR(sdof_obj)[0] = 1.0;

SDOFO_DIR(sdof_obj)[1] = 0.0;

SDOFO_DIR(sdof_obj)[2] = 0.0;

SDOFO_CENTER_ROT(sdof_obj)[0] = 0.0;

SDOFO_CENTER_ROT(sdof_obj)[1] = 0.0;

SDOFO_CENTER_ROT(sdof_obj)[2] = 0.0;

SDOFO_CONS_P(sdof_obj) = TRUE; /* constrained motion */

if (SDOFO_CONS_P(sdof_obj))

{

SDOFO_LOC(sdof_obj) = 0.0;

SDOFO_MIN(sdof_obj) = -0.0349 ; /* min allowable angle */

SDOFO_MAX(sdof_obj) = 1.0471 ; /* max allowable angle */

SDOFO_INIT(sdof_obj) = SDOFO_LOC(sdof_obj);

SDOFO_LOC_N(sdof_obj) = SDOFO_LOC(sdof_obj);

}

}

}

But now I want to simulate the closure of the flapper, taking into account the friction at the flapper's hinge.

I tried to just assign the friction value to "sdof_prop[SDOF_LOAD_M_X]" ,but the flapper started to move backwards (opening) until the flow increases, which is not correct.

So I want to get the value of the hydrodynamic torque of the flapper, and compare it to the friction with some kind of "if statement" that may look like this:

real static_friction= 50;

real kinetic_friction=40;

real hydraulic_torque =??? ;

If (hydraulic_torque<static_friction)

{

sdof_prop[SDOF_LOAD_M_X]=0

}

else

{

sdof_prop[SDOF_LOAD_M_X]=-1*kinetic_friction;

}

BUT THE PROBLEM IS :

I don't know the udf code that can get the actual value of the hydraulic_torque on the flapper to compare it to the friction value.

Your help is highly appreciated.

Thanks a lot in advance.

Yen, B. C. (1987). Urban Drainage Hydraulics and Hydrology: from art to science. Urban Drainage Hydraulics and Hydrology, 1-24.

Thank you so much if you can share it.

If a hydraulic jump is formed in a rectangular channel/flume , then does the location of the jump depends upon the channel l/flume length or does it depend only upon the upstream and downstream depths of the channel , inlet Froude's no. and bed slope and NOT on the channel length?

I am simulating a hydraulic jump in a rectangular flume that has an inlet and an tailgate at outlet. I need to adjust the tail gate opening to get the desired hydraulic jump. So i simulated the case for few time steps but now I want to drop the tail-gate further to obstruct the flow.

I have duplicated the geometry,mesh and setup , then i changed the dimension of my tail-gate (there by closing the outlet opening below the tail-gate further) . I have initialised the case with the existing .cdat file from the previous simulation. But the console shows me DIVERGENCE immediately after running the calculations.I even updated the mesh and re-cheked the setup Could help me with this?

I am working with hydraulic permeability of hydrogels. I am not sure at what extend the Darcy law is applicable and at what values of pressure, volume flow rate, the Darcy law becomes invalid. Any related papers or ideas would be helpful.

examples, video, papers, pdf it will be welcome

DEAR

I want to start my theses & want to know the last research and problems & non solve able methods or problems in hydraulic jumps in culverts or pipes

thanks alot

Hello, I am part of a project where we are investigating the behaviour of a hydraulic filter to assess when it needs replacement. Our aim is to do this using a motor current sensor and a pressure sensor past the filter. Plotting the data clearly shows some linear dependencies between the current and pressure.

Our hypothesis is that this linear behaviour will change over time in some aspects as the filter becomes more clogged with particles. One example that has already been attempted was to look at the data from the past 14 days and save the slope of the linear regression, this was then done over a longer period of time to see the trend. The trend of the slope was then plotted over time to analyse the change in behaviour.

We are looking for other more sofisticated ways of analysing the data from literature. Do you have any suggestions for literature reviews, papers or search terms?

Thank you!

Could you please tell me if you know available literature data on the quality of urban stormwater sewers, along with the measurement of flow and rainfall over the years? I'm looking for hydraulic and hydrological measurements on the scale of minutes or hours at the most. Need several rainfall events for data-driven approaches. Thank you for any information.

we need studies about Makhool Dam by hydraulic, geology and hydrology studies

Also please name your favorite book of Open Channel Flow/Hydraulics you follow for your research and academic activities.

I draw a hydraulic circuit and I want to control the position of the hydraulic cylinder to move the load and i must use a PID controller with a proportional directional control valve.

Does anyone help me with how I can interpolate the water level record using elevation as a reference? My study area is very rugged topographically, and I need to consider surface elevation during interpolation of the measured hydraulic heads. I am looking for a technical answer pls.

Hello, Im currently in an Engineering module of Fluid Mechanics, and I was hoping if anyone could assist me in the process with these 2 questions while my Professor is absent. I feel my process is correct, but i keep getting answers only close to what the real answer is. I wont be reanswering these questions, so anyone who can properly get through it and arrive at the answer would be appreciated

Q1

'A fluid of density 807 kg/m3 flows through a sudden contraction into to a pipe of diameter 17 mm, with final mean velocity 2.4 m/s.

If the total pressure loss is 401 Pa, calculate the diameter of the vena contracta, in mm to 1 decimal place'

Answer: 14.3 ± 0.05

'Two sealed tanks, whose total pressures differ by 3,764 Pa, a are connected by a pipe of length 82 m and diameter 22.8 cm. A fluid of density 897 kg/m3 flows through from one tank to the other at a steady rate. Calculate the mass flow rate in SI units, to 3 s.f., when

Answer: 23.1 ± 0.05 (kg/s)

Thank you

I am trying to develop a model for predicting bedload transport in a natural mountain river with shallow flow depths based on field measured data of bedload conc. and related hydraulic, geometrical and sediment parameters.

Hi all,

I am working on a HVAC project where many components(cooling coils, pumps, etc) needs to be modelled newly(new equations), and in addition new hydraulic connections. And EnergyPlus needs to be used for the overall system level simulation. For that I have to write/include the new equations into EnergyPlus. I have heard that the codes in EnergyPlus are written in C++. Problem is I haven't been able to begin with a good start. Primarily- Where do I go to edit/add new codes? ,and how do I create new Hydraulic connections between components? If you could point me to a direction, that would be hugely beneficial.

Thanks

Regards

Asutosh Boro

PDEng researcher Eindhoven University of Technology

This Chain Conveyor is used in harvester machine which will run on hydraulic motor.I have given data as length and width and load it will carry.

Hi, I'm working on a design project from one of my classes and need to draw the hydraulic profile for a water treatment plant, I have the elevations from a civil 3D surface, where we created a layout of the plant, and I calculated the head loss for each of the structures and head loss of the pipes connecting them, what else do I need to complete the hydraulic profile? I'm planning to draw the prolife in cad once I have all heads, elevations, and other needed information.

Thanks in advance.

1) The maximum and minimum produced power.

2) The maximum and minimum permissible reservoir height.

3) Hydraulic constraints are defined by the reservoir continuity equation.

4) The maximum and minimum permissible reservoir releases.

5) The maximum and minimum permissible reservoir Storage.

is the number of the production period

Hi, we are testing the coefficient of permeability of a remoulded clay sample using AS 1289.6.7.3, flexible wall triaxial method. However, after saturation and consolidation perculation stage was done for more than 24 hours. However the flow rate is significantly different from initial to final stage and permeability is changing from 1x 10^-7 m/s to 1x 10^-9 m/s. I believe this could be due to particle clogging in filter papers. I am confused when it comes to decide the permeabiltity. What would be the most accurate stage for selection of flow rate from this attached flow vs time graph?

Effective cell pressure was 50 kPa and the hydraulic gradient was 15.

My assessment of Different Hydraulic/Morphology Models I get a lot of questions regarding which model to use for Hydraulics and Morphology. The answer will be depends on the case and the required output. Here is my take on different available Hydraulic and Morphological models (Not in order of preference) Mike 21 GPU Mike 21/3 GPU is the most robust and stable software for your purpose. However it’s not very user friendly and has a steep learning curve. It’s very expensive and the post processing is also a pain. It’s the first choice for commercial use. Delft3D  Delft3D FM has the capability but still there are many bugs that will have to be resolved. Also not having Geo referencing capability based on co- ordinate in the mesh generation process is a limitation of Delft3D. With no GPU capability the run time could be long. TUFLOW GPU TUFLOW GPU is becoming popular and can be used with SMS and QGIS, but there is significant learning curve. FLOW3D FLOW 3D is alternative for physical modeling, and it’s not suitable for large scale modeling. CCHE2D CCHE2D does not have a very wide user base, so documentation and help could be limited. Also the free version has limited mesh size. Aquaveo SMS Aquaveo SMS has a very user friendly interface, so can be learnt very quickly. Pre and post processing is great. Some great tools for riverine modeling with sediment transport. With several modules for waves and sediment transport, but again the capabilities are not well documented due to limited user base for wave modeling. HEC RAS 1D and 2D HEC RAS being is good for basic learning. Suitable for steady state and unsteady state modeling. Though I am not fond of the unsteady state modeling, as previously it had a lot of issues and has a lot of limitations. The 2D module has no sediment transport capability. For the 1D model the sediment transport has plenty of bugs and the output is useless. Not a choice for complex riverine unsteady riverine modeling requiring morphology. Telemac 2d Suitable for Academic purpose mostly with limited documentation and manuals.

Can anyone give an idea - how is the hydraulic circuit playing a role in the development of aquaculture / fisheries? How can the knowledge on hydraulic circuits help? Why is it important?

However, HydroSight can be used for the joint estimation of aquifer hydraulic properties and gross recharge from incomplete metered groundwater usage. But point estimates of transmissivity(T) from HydroSight are likely to underestimate the aquifer heterogeneity, and for very heterogeneous aquifers they may be biased. Can it be overcome using MODFLOW with ArcGIS using GMS?

Hello everyone.

How are you doing?

Can you tell me some articles, theses that deal with the optimization of water networks (drinking water, wastewater and stormwater) with the Epanet software.

I am simulating a rectangular water channel. To validate my numerical results, I want to present a graph containing the enhancement of Nu for this channel with several Re. Then, I compared this variation with another's study where the hydraulic diameter is not the same, however, both channels are mini-channels.

pls download the paper given below:

In this paper - Under Section 3.1:

The authors validated their model with Fan et al., Ho et al, and Moraveji et al. However, their hydraulic diameters are not same. How is this comparison valid?

I am using a SVM (supervised) classifier for internal leakage fault detection and classification of a hydraulic actuator, i am considering 3 stages of fault namely low,medium and high levels of internal leakage the method is as follows

1. first a known level of fault is artificially induced into the system

2. system parameters and signals are obtained

3. the SVM classifier is trained using the obtained results and known fault labels

but since the actuator is in a hydraulic excavator the number of data points the can be obtained is constrained (for example i obtained 40 data of each fault class totaling 120 observations)

Is the use of 120 data points to train the classifier justifiable?

What is the hydraulic retention time HRT and Sludge retention time?

can you give example in nitrification process

thank u

Models MHW-3 and WR-6 Narishige hydraulic micromanipulator for electrophysiology. The control knob turns OK but produces no movements in the manipulator at the the other end of the hydraulic line. None of the parts seem to be stuck. I have contacted Narishige but because they are older than 10 years they don't calibrate anymore. Does anyone know a company that can calibrate them?

Hello scientific community,

In your point of view, is it possible to include the terms of variation of the geometry of a channel in the analytical expression of the Serre-Green-Naghdi soliton?

Darcy’s law and pore-scale hydrodynamics:

As against hydro-static equilibrium, during an oil production, when oil and water keeps moving (hydro-dynamic condition) through the pores in an under-saturated oil reservoir, whether the associated hydraulic forces (and in turn, its effect on the hydraulic head) won’t get influenced by the pore-scale processes such as pore-size and tortuosity ‘also’ – resulting from the (possible) marginal ‘mixing of oil with water’ and a significant ‘mixing of gas with water’?

If so, whether the concept of ‘hydraulic head’ associated with Darcy’s law deserves a special attention – when applying for an under-saturated oil reservoir, where a simple ‘average reservoir pressure’ replaces the Darcy's original ‘hydraulic-head’ concept at the macroscopic-scale?

1) I introduce a new external force without mass, coming from the ground, onto the structure, to help the structure to respond to the earthquake and to receive and deflect seismic loads, outside the structure, into the ground, thus controlling the displacements of the structure which deform it above the breaking point and knock it down. 2) I built a mechanism which is the first mechanism in the world that has the ability from the foundation surface with the help of hydraulic jacks to exert horizontal pressure on the ground towards the slopes of a borehole, along its entire height, and at the same time to exert vertical pressures on the ground surface, before the construction of the project. The result of this technique is to compact the ground from the foundation surface and in all directions, in order to stabilize on the one hand and to obtain a strong anchorage of the mechanism, twice the design intensities. Filling the borehole (after condensing) with concrete offers a deep foundation higher than the width they make today, because it has the ability to receive greater intensities of compression and traction. 3) I am the first to insert the double pre-tension using the same pre-tension tendon. I apply the first pre-tension between the ground surface and the anchoring mechanism, and the second pre-tension between the nodes of the top level and the anchor that preceded the ground. The result is that the construction joins the ground like a sandwich. This mechanism does not differ from the prestressed cantilevers of the bridges which rest on pedestals.

Dear colleagues,

We are looking for specific (or global) PTF functions (with good performance in sandy soils) to estimate hydraulic properties (field capacity, permanent wilting point, available water)

The "sandy soils" we are studying are from the classes sand, loamy sand, sandy loam.

The predictive parameters we are thinking to use are particle size (coarse sand, fine sand, silt, clay, organic carbon, bulk density, CEC, soil types and maybe others)

If someone has worked with this topic. I thank you in advance for your suggestions.

Regards from Brazil

Wenceslau Teixeira

Embrapa Solos

I'm attempting to carry out some experiments which require me to remove the caudal part of mouse spinal cord (S1-Co2).  I came across some literature which describes hydraulic extraction using a syringe to push the entire spinal cord out.  I have tried a few times but the final part of the spinal cord seems too this to fin into a needle.  I also tried to remove the spinal cord from the column using a spring scissor, but I ended up cutting the tissue. Any advice on how to improve my extractions?

I'm currently in studying the design of filter system of hydraulic tank. Which type of filter can provide the best efficiency of filtration, more safer, less losses and not easily damage the pumps in hydraulic system?

Is it possible to lower the potentiometric surface in a confined aquifer below the confining layer through sustained pumping ? If it happens, what parameter (specific yield or storage coefficient ?) will control the hydraulic properties of the aquifer once the potentiometric surface falls below the confining layer ?

I am wondering if EN197 1 2000 specifies any non-portland hydraulic cement and nonhydraulic cement？Or in other words EN197 1 2000 only specifies Hydraulic cement that includes Portland cement and Portland-based blended cement？Thanks

I have tried Idelchik's Handbook of Hydraulic Resistance 4th Edition (2007 page 300) formulas and across some range the formulas are reported valid for, the law of conservation of energy is violated (expansion loss without kinetic exit loss included) and differs from CFD results, underestimating by order of magnitude of about 137 times (while it agrees in other sub-ranges for which it is reported valid within 3% of CFD results).

I have also tried Ekert et al (1976 pages 30 and 36) on NASA's site: https://ntrs.nasa.gov/api/citations/19770005050/downloads/19770005050.pdf

The results in Eckerts also overestimates by as much as 62% of the CFD results when the diffuser cone angle is 5 degrees whereas it agrees within 7% of the CFD results when the cone angle is 1 degree.

Diffuser Loss formulas which agrees within 5% of CFD results for the range it is reported valid for will be appreciated.

The Friction Loss formulas work perfect but the problem is the accuracy of the expansion loss formulas. I need the formulas to run numerical optimization before generating a geometry for CFD so important I get the analytical/numerical formulas .

Thanks in anticipation of the help

Hello, I am developing my degree work on the coordination of hydraulic and thermal units in an energy network and I was wondering if there is any test network with which I can evaluate or compare the results obtained with my work. Thank you very much in advance

I have an anaerobic reactor which needs to be fed 20 ml of sludge everyday. (Working volume: 300 ml) for 15 days hydraulic retention time. I'd like to feed it alternate days rather than every day, a blunt calculation says feed 40 ml for every 2 days. I guess this will change my HRT, I'd like to know your thoughts and let me figure out a way to address this.

Dear Researchers,

What type of software do you use to create hydraulic and electric diagrams? How do you create figures used in your articles?

Best regards,

Łukasz Stawiński

comparison between air suspension and hydraulic one

The check dams used as torrent control works have some characteristics - in my opinion - which are neither quite those of retention dams (hydraulic structures) nor quite those of retaining walls. So, taking into account their behavior over their period of existence (50 to 100 years), a short period the check dam works as a hydraulic structure subject of hydrostatic/hydrodynamic pressures. Then, after the upstream sector is completely filled with sediments, it works as retaining wall, perodically submited to floods. I put this question because, verifying such a structure using Eurocode 7 I obtain larger dimensions than using the old global factors of safety. And a more than 100 years of experience shows that economically the last approach is better. 

According with the experience and technical regulations in the European countries, are them subject of Eurocode 7 or of some special regulations? 

changing the length of hydraulic jump with d/s and u/s water level. collection between drawdown and hydraulic jump in d/s of cross regulators during open gates

What is the method for making a thick flat chromium strip by powder metallurgical method in a container? Is it possible to use a hydraulic press in the environment to compress it?

I am working on hydraulic energy storage using pumped-storage turbine energy transfer stations. and I want to calculate friction energy losses using Darcy equation .

I want to use standard sandpapers of different grit sizes to impart flow resistance to a surface. I am wondering how to convert the roughness of sandpaper to an equivalent sand-grain roughness. Is there any established correlation between grit size and equivalent sand-grain roughness?

Wear and tear in steel/stainless steel pump parts like impeller, sleeves, bowl would cause leakage, reduction in the head height, reduce discharge, increase clearances, etc. How does this wear and tear in such part influence the pump parameters? Case studies, personal experiences, professional opinions are all welcome.

Thanks and best regards,

S.C. Atul

in general hydraulic diameter is 4*area of cross-section / wetted perimeter.

but in louvered fins have interrupted fins, so in this type of fin how to determine equation of hydraulic diameter in terms of design parameter.

Please help me in this.

thanks for this in advance

We have a hydraulic system (water collector and distributor) which is newly started, how can we calculate its reliability?

For example ATF (Automatic Transmission Fluid).

I have noticed in my readings that they are only limited to measuring viscosity, but I cannot find studies of its viscoelastic properties.

To my understanding an ATF this working conditions is subjected to different levels of shear rate ans temperature.

I have experience in Operations and Maintenance Department for machines and equipment. I can troubleshoot, work and fix Mechanical, Hydraulic, pneumatic and electrical components.

I would like to do research in this topic and topic of mechanical engineering and machining processes.

What kind of research topics I can choose to apply for in universities or institutions?

Anyone can help and give good suggestions

Thank you