Mechanical Engineering

Diffuse interface immersed boundary/finite volume framework for compressible viscous flows

The computation of compressible viscous flows is relevant to aeronautical and space applications which also involve complex geometries. Some of the applications that are of interest include design of scramjet intakes and predictions of heat transfer in re-entry configurations. The latter is signicant from the viewpoint of design of thermal protection systems while the former is key for high-speed transport.

Design and Development of a Composite Heat Sink based Battery Thermal Management System for Indian Electric Vehicle Industry

Electric vehicles (EVs) have the potential capability to minimize the severe threats posed by environmental pollution and energy crisis to humankind. Energy storage systems made of lithium-ion batteries are widely used to power these vehicles. Thermal-degradation of batteries caused by temperature change significantly reduces the battery life and imposes a potential safety threat in the form of battery explosion. Increase in cell temperature over and above the threshold leads to thermal runaway which can lead to a terrible catastrophe.

Ultra-precision machining of brittle materials - Material micro-structural perspective and cutting edge radius effect

Machining is the process of removing unwanted material from the blank to obtain the final product of desired shape, size and surface integrity. Most of the components goes through machining at some point during their production cycle. Machining of brittle materials such as glass, ceramics and tungsten carbide (WC) is often difficult because of their high tendency towards the characteristic brittle fracture. The most critical challenge in machining such brittle materials is to attain the material removal by plastic deformation rather than the brittle fracture.

Development of Failure Limiting Diagram For Surface Modified Wheel-rail and Wind-turbine Bearing Materials Through Rolling Contact Fatigue Studies

The life of wheel-rail in railways and ball-raceway in wind turbine bearings are limited by rolling contact fatigue (RCF) and wear failures. Such failures are inevitable due to higher magnitude of normal and tangential stresses developed at the contact during the operation. RCF is caused by repetitive contact stress along with rolling and sliding appear simultaneously at the contact zone. Whereas, removal of material from the surface by wear is a function of the sliding and contact stress.