Ihsan Y. Hussain

University of Baghdad - College of Engineering · Mech. Engr. Dept.

The friction clutch is an important machine part in the torque transmission system, where it is responsible for gently transmitting the power from the engine to the gearbox and damping the tensional vibration. At the beginning of the engagement between the clutch’s elements, a large amount of heat is released due to frictional sliding between the e...

The friction clutch design strongly depends upon the frictional heat generated between contact surfaces during slipping at the beginning of the engagement. Firstly, the frictional heat generated reduces the performance of the clutch system and then leads to premature failure for contacting surfaces in some cases. The experimental effort in this wor...

A dry clutch is a gadget utilized in vehicles for power move from the motor to the transmission framework. The lifetime of a friction clutch is profoundly reliant upon the life and execution of the clutch plate. A car dry contact clutch framework comprises of a flywheel, a pressure plate, and a clutch plate. The clutch disk includes frictional mate...

The main task of the frictional facing of a clutch disc is to transfer the power from the driving to the driven parts. High frictional heat will be generated when the frictional facing comes into contact with the moving surfaces (flywheel and pressure plate). In this research paper, the selection of the frictional‐facing material of the clutch disc...

The present work aims to validate the experimental results of a new test rig built from scratch to evaluate the thermal behavior of the brake system with the numerical results of the transient thermal problem. The work was divided into two parts; in the first part, a three-dimensional finite-element solution of the transient thermal problem using a...

The thermal characteristics of different types of friction materials are investigated experimentally using new friction clutch material in the present work under different working conditions; such as rotational speed, torque, and sliding time. The magnitude and distributions of the temperature over a cross section of friction clutch element (pressu...

The brake system is one of the most important systems in all vehicles. The main objective of this system is to control the vehicle mechanical movement and stopping. Where, it can’t drive safely any vehicle without the brake system to control its acceleration rate and its stability. The effective factors that affected the brake performance are the p...

The thermal characteristics of four types of dry friction clutch materials (LUK, G95, HCC, and Tiger) are investigated experimentally and numerically in the present work under different working conditions; such as initial sliding angular velocity (ωro), torque (T), and sliding time (ts). The temperature distributions over a cross‐section of frictio...

Several parameters affect the properties of Portland cement and one of these parameters is the cooling rate of the clinker. If the effectiveness of the cooling method of the clinker increases, a good enhancement in the properties of Portland cement will be found. Depending on the new cooling method suggestion by Nasr et. al. [20], the counter patte...

The friction clutch is considered a very important element of machines, as it plays a major role in transferring power from the driving part to the driven part. A common application of the friction clutch is in vehicles to connect between the gearbox and the engine. Fast wear occurs as a result of frictional heating that is generated when the clutc...

The present second edition of this manual was written to be a simple, clear, and easy to use manual for postgraduate engineering students and faculty members to help them in writing M.Sc. theses and Ph.D. dissertations according to the prevailing academic standards of scientific research. The work is based on lecture notes of a course in “Technical...

The present second edition of this manual was written to be a simple, clear, and easy to use manual for postgraduate engineering students and faculty members to help them in writing M.Sc. theses and Ph.D. dissertations according to the prevailing academic standards of scientific research. The work is based on lecture notes of a course in “Technical...

The present work reports an experimental investigation for the convective boiling heat transfer of R-134a in vertical tube filled with metal foam. High porosity (0.95-0.98) with PPI (40-80) metal foams (open-cell) are being considered to improve heat transfer process. Both of hydrodynamic and heat thermal performance are investigated. The results i...

Most of failures in the friction clutches occur due to the excessive heat generated due to friction between various parts, and this heat causes high temperatures leading to high thermal stresses. In the present research paper, numerical simulation had been developed using finite element method to simulate the thermal behavior of the dry friction cl...

A numerical simulation is proposed to investigate the thermal behavior ofa Central Processer Unit (CPU) as a single electronic component placed on Printed Circuit Board (PCB) equipped with a heat sink. Two types of heat sinks were used; the first is with solid fins and the other with perforated fins. Natural convection cooling is considered, with t...

forced convection boiling heat transfer in vertical tube filled by metal foam for Refrigerant(R-134a) (the working fluid was used because it is zero ozone depletion) is numerically investigated using the modified multiphase mixture model for various heat flux. The effect of changing mass flux, porosity and PPI was analysed. It was found that, both...

Natural convection boiling heat transfer for Refrigerant R-134a flow in a metal foam filled vertical tube is numerically investigated in the present work by using the Multiphase Mixture Model MMM at constant heat flux for both transient and steady state behavior under different parameters. The effect of changing imposed heat flux, porosity, PPI (po...

A computational algorithm for calculating the unsteady compressible and turbulent hydrodynamic and thermal boundary layers over a porous flat plate with uniform suction or injection is developed in the present work. The mathematical modeling involves the derivation of the governing partial differential equations of the problem. These are the contin...

When a body slides over another body, the major part of the work done against the frictionalforce which resists the motion will appear as a heat at the interface between the contact surfacesof the bodies. Consequently, the temperatures of that interface will increase to high values and maycause a high thermal stresses enough to produce large therma...

Cascaded Thermal Energy Storage (CTES)-thermal energy storage system with multiple Phase Change Materials (PCMs)-has been suggested as a solution for the heat transfer reduction through the process of heat exchange, which is created by inevitable reduction of temperature difference resulting from the use of one PCM in Thermal Energy Storage (TES) s...

Cascaded Thermal Energy Storage (CTES), a term that refers to a thermal energy storage system with multiple phase chance materials (PCMs), has been suggested as a solution for heat transfer reduction through the process of heat exchange by reducing temperature differences. The PCMs used are thus paraffin waxes with different melting temperatures. A...

The accurate calculation of the frictional heat generated between the contacting surfaces of friction clutch elements during the slipping period due to the relative motion between the driving and driven parts is considered to be an essential factor for automotive designers. A numerical model of a single-disc clutch was built using the finite elemen...

In an attempt to find out quality of imported and manufactured brake sliding-parts, the present research is adopted on practical situations, and the car SAIPA 131 was selected. As a device to accomplish the work tests, a full-scale brake rig was built. Temperature allocation of brake pad frictional-lining is obtained over a period of drag braking t...

Cascaded Thermal Energy Storage (CTES), a term that refers to a thermal energy storage system with multiple Phase Chance Materials (PCMs), has been enhanced by using metal foam. The present paper includes an experimental and numerical investigation for discharging process at different Heat Transfer Fluid (HTF) velocities, for three systems: single...

Cascaded Thermal Energy Storage (CTES), a term that refers to a thermal energy storage system with multiple Phase Chance Materials (PCMs), has been enhanced by using metal foam. The present paper includes an experimental and numerical investigation for discharging process at different Heat Transfer Fluid (HTF) velocities, for three systems: single...

Cascaded Thermal Energy Storage (CTES), a term that refers to a thermal energy storage system with multiple phase chance materials (PCMs), has been enhanced by using metal foam. This paper includes an experimental investigation for discharging process at different heat transfer fluid (HTF) velocities, for three systems: single PCM; CTES, and CTES w...

The properties of Portland cement depend on several parameters, and the cooling method is one of these parameters. When the effectiveness of cooling method increases, the properties of Portland cement are enhanced. In the present work, a new cooling method is suggested and numerical analysis is made by CFD modeling using (FLUENT 6.3.26). Using the...

In an attempt to establish a practical-theoretical study to find out quality of imported and manufactured brake sliding-parts, the present work was done with both experimental and numerical parts. The car SAIPA 131 was selected because it is the most requested car in the state company for automotive industry in Iraq. In the practical portion, a de...

شرح لتعليمات الترقيات العلمية الجديدة في العراق رقم 167 لسنة 2017 وتوضيح آليات تنفيذها

In this modest work, the water heating system using hot water was simulated and developed. Heating using hot water is used in small houses or large buildings in cold areas or climates. Fuel (firewood, coal, gas or oil) or electricity is used to generate hot water, steam or hot air, and then transfer the heat. It is a heating system for houses and o...

Aerodynamic characteristics of Peugeot 405 car model had been investigated numerically and experimentally in the present work. ANSYS Workbench 17.0, fluent solver and modeling in SolidWorks 2012 was used to simulate flow around a Peugeot 405 car model. The numerical investigation was done at inlet freestream velocities of (10, 20, 30, 40 and 50 m/s...

The effect of thermal stratification in stable stationary ambient fluid on free convective flow of a viscous incompressible fluid along a plane wall is numerically and experimentally investigated in the present work. The governing equations of continuity, momentum and energy are solved numerically using finite difference method with Alternating Dir...

The effect of thermal stratification in stable stationary ambient fluid on free convective flow of a viscous incompressible fluid along a plane wall is numerically and experimentally investigated in the present work. The governing equations of continuity, momentum and energy are solved numerically using finite difference method with Alternating Dir...

In the present work, a rig was designed and manufactured in order to investigate the forced convection heat transfer from outer cylinder at different heat fluxes to inner rotating shaft. The effects of relevant parameters such as Richardson and Rayleigh numbers on flow and heat transfer features are considered in this study. The results obtained il...

The effect of linear thermal stratification in stable stationary ambient fluid on free convective flow of a viscous incompressible fluid along a plane wall is numerically and experimentally investigated in the present work. The governing equations of continuity, momentum and energy are solved numerically using finite difference method with Alternat...

Abstract An investigation of thermal conductivity enhancement, melting and solidification processes of Phase Change Materials (PCMs) by using metal foams has been carried out. Two models have been used in the experiments, model I for measuring the effective thermal conductivity of metal foam embedded in paraffin wax, and model II used as a small sc...

The present book is a handout lectures for the M.Sc. Course ME532 : Advanced Heat Transfer / II – Convection & Mass Transfer. The course is designed for M.Sc. Students in the Mechanical Engineering / Thermo-Fluids specialty. The time schedule needed to cover the course material is 15 weeks , 3 hrs. per week. The course had been taught by the author...

Aerodynamic characteristics of inverted single element airfoil with and without ground effect had been investigated experimentally in Low-Speed Wind Tunnel of test cross section area (0.7x0.7 m2) and maximum velocity 55 m/s to quantify the aerodynamic characteristics of inverted CLARK-Y smoothed airfoil. The ground effect was introduced by using a...

Overview and critical analysis for PG programs in Iraqi colleges of engineering and suggestions for improvement.

The presentation is about the QA culture in Iraq, and addresses the SAR as the first step....

A two-dimensional computational study had been performed regarding aerodynamic forces and pressures affecting a cambered inverted airfoil, CLARK-Y smoothed with ground effects by solving the Reynolds-averaged Navier-Stokes equations, using the commercial software COMSOL Multiphysics 5.0 solver. Turbulence effects are modeled using the Menter shear-...

A two-dimensional computational study had been performed regarding aerodynamic forces and pressures affecting a cambered inverted airfoil, CLARK-Y smoothed with ground effects by solving the Reynolds-averaged Navier-Stokes equations, using the commercial software COMSOL Multiphysics 5.0 solver. Turbulence effects are modeled using the Menter shear-...

Hydraulic and thermal performance of metal foam filter were investigated numerically and experimentally in the present work for clean and dusty air in a, copper foam filter. Two pore densities of copper foams are used, 10 PPI with average pore diameter 905.7 µm with porosity (90%) and 40PPI with average pore diameter 568.6 µm with porosity (89%). C...

In this work, a numerical and experimental investigation has been carried out to demonstrate the heat dissipation from the base fins attached to hot substrate by utilizing plate-fin form built-in with piezoelectric actuator. The geometrical configuration considered in this study is representative of substrate with single element of the plate-fin an...

The calibration of a low-speed wind tunnel (LSWT) test section had been made in the present work. The tunnel was designed and constructed at the Aerodynamics Lab. in the Mechanical Engineering Department/University of Baghdad. The test section design speed is 70 m/s. Frictional loses and uniformity of the flow inside the test section had been teste...

The present handbook was written to provide a simple and clear guide for postgraduate programs offered by the Mechanical Engineering Department / College of Engineering-University of Baghdad. The work is based on a long experience for the author lasted for more than twenty years of work in the field of postgraduate studies, supervising 38 Thesis an...

Two-dimensional unsteady mixed convection in a porous cavity with heated bottom wall is numerically studied in the present paper. The forced flow conditions are imposed by providing a hydrostatic pressure head at the inlet port that is located at the bottom of one of the vertical side walls and an open vent at the top of the other vertical side wal...

The present booklet was written to be a simple, clear, and easy to use guide for postgraduate students,to help them in writing their M.Sc. theses and Ph.D. dissertations. The work is based on lecture notes of a course in “Technical Writing” given by the author to postgraduate students at the Mechanical Engineering Department / College of Engineerin...

The present work is concerned with the theoretical and experimental investigation of flow pattern of Newtonian fluid in liquid mixing process in stirred tank with flat blade impeller. A three-dimensional model for mixing process was simulated. The effected parameters are rotation speed and impeller diameter. Continuity, momentum, and turbulent equa...

The presentation outlines the QIP for the college of Engineering - University of Baghdad

Transient three-dimensional natural convection heat transfer due to the influences of heating from one side of an enclosure filled with a saturated porous media, whereas the opposite side is maintained at a constant cold temperature, and the other four sides are adiabatic, were investigated in the present work experimentally. Silica sand was used a...

Two-dimensional unsteady mixed convection in a porous cavity with heated bottom wall is numerically studied in the present paper. The forced flow conditions are imposed by providing a hydrostatic pressure head at the inlet port that is located at the bottom of one of the vertical side walls and an open vent at the top of the other vertical side wal...

The present work is a theoretical study of the vaporization by direct contact of refrigerant drops and immiscible liquid. Refrigerant R12 were used for the dispersed phase, while water was the immiscible continuous phase. The analytical study has been used to investigate the variation of bubble radius, thickness of gas hydrate, Re, Nu, heat transfe...

The present work describes numerical and experimental investigation of the heat transfer characteristics in a plate-fin, having built-in piezoelectric actuator mounted on the base plate (substrate). The geometrical configuration considered in the present work is representative of a single element of the plate-fin and triple fins. Air is taken as th...

Heat transfer around a flat plate fin integrated with piezoelectric actuator used as oscillated fin in laminar flow has been studied experimentally utilizing thermal image camera. This study is performed for fixed and oscillated single and triple fins. Different substrate-fin models have been tested, using fins of (35mm and 50mm) height, two sets o...

Theoretical and experimental investigations of forced convection heat transfer from a heated flat plate embedded in porous media with a constant heat flux had been carried out in the present work. The experimental investigation included a set of experiments carried out to study the effect of Reynolds number and heat flux on the temperature profile...

Natural convection heat transfer through a fluid-saturated porous media in inclined cylindrical enclosure was investigated experimentally and numerically in the present work. Numerical solution of the governing equations was made with the appropriate boundary conditions by using a CFD code FLUENT (fluid flow) 6.3.26. The experimental tests were car...

The thermal and fluid transport phenomena adjacent to a plane wall in a stable, thermally stratified saturated porous medium is investigated numerically and experimentally in the present work. Glass bead is taken as porous material with diameter (12mm). The temperature distribution and Nusselt number are discussed numerically (Fluent Program) and e...

Heat transfer around a flat plate fin integrated with piezoelectric actuator used as oscillated fin in laminar flow has been studied experimentally utilizing thermal image camera. This study is performed for fixed and oscillated single and triple fins. Different substrate-fin models have been tested, using fins of (35mm and 50mm) height, two sets o...

Abstract— Mixed convection boiling heat transfer in a vertical porous tube heated at a constant heat flux is numerically investigated using the multiphase mixture model. Transient and steady state behavior of fluid flow and heat transfer under different parameters is analyzed and presented. Results show that liquid saturation decreased as the heat...

Mixed convection boiling heat transfer in a vertical and inclined porous tube heated at a constant heat flux is experimentally investigated. A series of experiments were carried out with heat flux range from 256 W/m2 to 7820 W/m2. Variation of the mass flow flux and the temperatures at the tube wall and at the tube centerline were measured under th...

The effect of linear thermal stratification in stable stationary ambient fluid on free convective flow of a viscous incompressible fluid along a plane wall is numerically investigated in the present work. The governing equations of continuity, momentum and energy are solved numerically using finite difference method with Alternating Direct implicit...