Ashishkumar Jashvantlal Modi

Government Engineering College, Bharuch | GEC · Mechanical Engineering

Fuel saving and emission control in transportation is a global critical issue so that research requires to concentrate on the energy conservation of diesel engines. Generally, in an internal combustion Engine, around 66 % of the total heat is lost and around 33% is used for Brake Power. It is very important to improve the energy level of the engine...

The presence of vortices in a flow field significantly impacts heat transmission. The effect of a modified rectangular winglet vortex generator on heat transfer and pressure drop performance for a fin-tube heat exchanger (FTHE) is experimentally explored in this work. Design and fabrication of full-scale prototype of an FTHE are carried out. Two ty...

In fin-and-tube heat exchangers (FTHEs), vortex generation is found as one of the promising emerging passive technique for augmenting the rate of heat transfer on air-side. In the present study, three dimensional numerical study is performed to evaluate thermo-hydraulic performance of FTHEs equipped with rectangular winglet vortex generators (RWVGs...

Vortex generation has been emerged as one of the promising passive technique for improving air-side heat transfer performance of air cooled heat exchangers. It can be achieved by employing small flow turbulators, called vortex generators (VGs), which are installed on the heat transfer surface (fins). VGs can generate longitudinal vortices, which st...

In the current paper, numerical analysis has been carried out to explore the influence of angle of attack and length of rectangular winglet vortex generators (RWVGs) on the performance of the tube finned heat exchanger (TFHE). RWVGs are located at the downstream of the circular tubes with three selected angles of attacks i.e. 20°, 30° and 40°. The...

Energy conservation and efficiency have been the quest of engineers concerned with internal combustion engine. Theoretically, if the heat rejected could be reduced, then the thermal efficiency would be improved, at least up to the limit set by the second law of thermodynamics. For current work a ceramic coated twin cylinder water-cooled diesel engi...

Need to use renewable energy in the form of ethanol fuel derived using agriculture waste to reduce load on petrol derived from crude oil, which is available in limited quantity. This is mostly due to stock of petroleum product are depleting day by day, hence more use of renewable fuels gets attraction in developing country like India. In recent yea...

This work concentrates on investigating the combustion and emission characteristics of diesel engine running on butanol-diesel blends. The blending ratio of butanol to diesel was varied from 0 to 40 vol% using an increment of 10 vol%, and each blend was tested on a diesel engine equipped with an EGR system. The test was carried out fewer than two e...

Investigations have been done to better understand the fluid flow and heat transfer in copper-based microchannel heat sinks designed for applications in electronics cooling. The present work addresses electronic chips cooling with force convection of alumina-water in copper based single microchannel heat sink by CFD software FLUENT. The Nusselt num...

The gradual phasing-out of asbestos in automotive brake friction materials in many parts of the world has sparked the onset of extensive research and development into safer alternatives. As a result, the brake friction industry has seen the birth of different brake pads and shoes in the past decade, each with their own unique composition, yet perfo...

The main focus areas of today's IC engine design are energy efficiency and higher thermal efficiency. As there is a high amount of heat loss in atmosphere due to which the efficiency is lower for the standard engine. There is one possible solution to reduce such problem i.e., converting the conventional CI engine in to the LHR engine. For the curre...

A four stroke diesel engine in which water & diesel coolant are used as a reference in this study. The experiments are conducted with the purpose to test the applicability of exhaust gas calorimeter model in order to quantify the heat losses through exhaust gas. The model considered the calorimeter system components such as water reservoir, pipe fo...

Energy conservation and efficiency have been the quest of engineers concerned with internal combustion engines. The diesel engine generally offers about two thirds of the heat energy of the fuel out of which one-third to the coolant, and one-third to exhaust, leaving only about one third as useful power output. This paper reviews work of previous i...

Braking is a process which converts kinetic energy of vehicle into mechanical energy which must be dissipated in form of heat. Without brake system in the vehicle will put a passenger in the unsafe position. Brakes convert friction to heat, but if the brakes get too hot, they will cease to work because they cannot dissipate enough heat. The objecti...

Energy conservation and efficiency have been the quest of engineers concerned with internal combustion engine. Approximately one-third of total fuel input energy is converted to useful work. Since the working gas in a practical engine cycle is not exhausted at ambient temperature, a major part of the energy is lost with the exhaust gases. In additi...

Energy conservation and efficiency have been the quest of engineers concerned with internal combustion engine. Theoretically, if the heat rejected could be reduced, then the thermal efficiency would be improved, at least up to the limit set by the second law of thermodynamics. Low Heat Rejection engines aim to do this by reducing the heat lost to t...