Muhammad Zeeshan Zahir

University of Engineering and Technology, Peshawar · Department of Mechanical Engineering

The basic aim of this research is to study tool sharing philosophy and proposed a model for black and colored Petri Net. A new design tool PN is used to model and evaluate tool management philosophy and then analyzes, evaluate, integrate and compare with each other. Performances assessment of each model is studied with the help of INA and LINGO sof...

Pakistan heavily depends on Natural Gas for electricity generation and it contributes more than 40 percent of overall electricity generation. Various other sources of electricity generation available in the country are Hydro Energy, Oil, Coal and Nuclear Energy. Apart from the abundant reserves available in the country, the utilization of Coal in e...

Borehole is a drilled hole inside the ground that accommodates vertical ground heat exchanger (VGHE).VGHE is made of High Density Polyethylene (HDPE) pipe, bent in U-tube shape placed vertically within the borehole and fixes it by means of thermally enhanced grout material which enhances heat transfer rate between VGHE and surrounding ground. The e...

Due to high efficiency and low green gases emission geothermal heat pump (GHP) has been used extensively worldwide for air conditioning of commercial and residential buildings. GHP uses the reliable, free and abundantly available natural heat of the ground. Ground at a depth of few meters depth exhibits year around constant temperature, Pakistan ha...

Due to increasing global warming and the accompanying massive climate change, there is a heightened interest in the generation of renewable energy. Amongst several renewable energy sources, solar energy has been of great interest due to being the most abundant, inexhaustible, clean and sustainable source. Solar systems also have a modular structure...

This paper deals with an experimental investigation of hole quality in Al2024-T3, which is one of the aerospace alloys used in aircraft fuselage skin due to its high level of resistance to fatigue crack propagation. The experiments are conducted with 6 mm uncoated carbide and HSS drill bits using a CNC machine under dry conditions and different dri...

Microchannel heat exchangers (MCHX) represent the advanced phase in the development of heat exchangers. In this study, we examined the technical feasibility of the proposed MCHX based on actual data collected from two local industries: electric utility and cement factory. In case of electric utility, water is considered as a working fluid whereas,...

This research employs experimental and numerical methods to evaluate the Sound Pressure Level (SPL) inside motorbike mufflers and suggests a new design for reducing the noise level in 70cc Honda motorbikes' reactive mufflers. The flow of exhaust gases is analyzed through Large Eddy Simulation (LES) in numerical simulations of both conventional and...

The purpose of this study is to examine the impact of various process parameters, such as cold work, aging temperature, and aging time, on the yield strength, ultimate tensile strength (UTS), and elongation of AA6061 tubes. The experimental plan is carried out, and the data is analyzed using Design Expert software. Main effects plots and interactio...

This study proposes the use of symmetrical ogive-shaped ribs on the walls of microchannel heat sinks (MCHS) to improve their thermal performance with minimal pressure drop. The ribs are arranged in three different configurations: ribs attached to all channel walls (MC-SAWR), ribs attached to side channel walls (MC-SSWR), and ribs attached to the bo...

Integrating sustainability, a flexible manufacturing system, and Industry 4.0 resolves the issues of fluctuating market demand arising from customization requirements. Modular products allow flexibility to adapt to changing requirements and optimize resource utilization. In this study, a method was proposed and applied to two products, i.e., a 3D p...

This research presents a fully coupled 3D numerical model to analyse the dynamics of high-speed electromagnetic forming process for aluminium alloy AA6061-T6. The effect of Lorentz force distribution, velocity and kinetic energy on deformation, the bounce back effect and failure of the sheet has been investigated. Experiments were performed for AA6...

Establishing the safe span length of suspended pipelines incorporating vibration is of extreme importance and has been rarely reported in literature. Literature reveals that analytical formulae has been used for calculation of safer span length which are mainly based on bending stresses. American society of Mechanical Engineers (ASME) has recommend...

This research was carried out aiming the modification in the present design process for Unmanned Air Vehicles (UAV). UAVs are flying machines, that are either self-piloted or flown by a pilot. The desired goal was fulfilled by designing and fabricating a lightweight, twin boomed, U tail RC Plane. The design was originally modelled in Solid Works. T...

Our world has never faced a far graver threat than it does today, the energy crisis. Low lying rural areas have been identified as mostly suffered areas due to non-availability of power. The energy production from solar photovoltaic system has gained attention worldwide as it a clean and renewable source of energy. The power output of solar panel m...

Demand for underground trenchless pipeline installation in urbanized setting has dramatically increased over a past few years. Trenchless method for piping installation has numerous advantages including avoid road closures, loss of access to homes and business, noise reduction and avoid general disruptions. This study analyzes the stresses induces...

The implementation of a flexible manufacturing system (FMS) in the industries is a difficult task due to the underutilization of the resources. To fully utilize FMS resources; planning and analysis are required before implementing it. The most critical component is the tool which contributes to a significant amount in the overall cost of production...

An electric virtual impactor with a capability of sampling fine and ultrafine particles was developed and its performance was evaluated both numerically and experimentally. The electric virtual impactor was provided with metallic electrodes, to which electric voltage in the range of 75–9000 V was applied for creating an electric field within the vi...

In this study, the performance of a zigzag type mist eliminator with drainage channels was improved using slit plates. The collection efficiency of the mist eliminator was numerically investigated by considering the Eulerian-Lagrangian approach. The effect of the slit plates on the mist eliminator performance was evaluated by attaching a slit plate...

Quartz Tuning Fork (QTF) based sensors are used for Scanning Probe Microscopes (SPM), in particular for near-field scanning optical microscopy. Highly sharp Tungsten (W) tips with larger cone angles and less tip diameter are critical for SPM instead of platinum and iridium (Pt/Ir) tips due to their high-quality factor, conductivity, mechanical stab...

This study compares the effect of various contamination prevention structure shapes on preventing dust particle deposition on critical sensor surfaces. Sensor surfaces exposed to parallel and vertical airflows were considered as reference cases. A multi-layer plate structure was devised to reduce dust particle deposition on critical sensor surfaces...

A radial heat sink with circular base and perforated short fins arranged in staggered manner, proposed for LED light bulbs was investigated under natural convection and radiation heat transfer. Numerical model was established by considering the effect of finning factor, porosity factor, and orientation angle for improving the thermal performance an...

This study installed additional inlets on the cone section of a tangential cyclone separator and examined its effect on collection efficiency and pressure drop. When aerosol was injected through the additional inlets and clean air was injected into the original inlet, the cut-off size of particles decreased, compared to that when injecting aerosol...

A two-partitioned horizontal inlet was developed for improving the collection efficiency and minimizing the wall loss problem in slit virtual impactor. The two-partitions were provided to simultaneously supply both aerosol and clean air to the virtual impactor. Both numerical and experimental investigations were carried out on the developed inlet c...

A numerical and experimental investigation comparing two configurations for a slit nozzle virtual impactor, one using a three-partitioned horizontal inlet and the other using a typical vertical inlet, was conducted to improve collection efficiency and reduce wall loss. All parameters, such as the length and width of the acceleration nozzle, the wid...

We observed variations in collection efficiency and wall loss in a virtual impactor by applying a horizontal inlet. A parametric study on the dimensions of the horizontal inlet was conducted to determine the shape that could maximize the collection efficiency and minimize the wall loss. As a conventional vertical inlet was replaced by a horizontal...