In the present paper the applicability of state and rate dependent friction laws in describing the phenomena of high speed slip at metal-on-metal interfaces is investigated. For the purpose of model validation, results of plate-impact pressure-shear friction experiments were conducted by Irfan in 1998 and Irfan and Prakash in 2000 using a Ti6Al4V and Carpenter Hampden tool-steel tribo pair are ...

Abstract The steady flow of Jeffrey fluid through a tube with both constrictions and dilatations have been studied. The expressions for velocity, pressure drop, volumetric flow rate, resistance to the flow, wall shear stress have been derived by assuming that the stenosis is mild. It is found that the resistance to the flow increases with the height of the stenosis and decreases with post steno...

An effective two-dimensional micromixer named rectangle-square wave micromixer with very simple structure has been presented. The rectangle-square wave micromixer based on split and recombination principle was simulated to analyze the fluid flow and the mixing efficiency. The flow rate, sample concentration, pressure drop at different position in the micromixer was researched. The simulation re...

A numerical study was carried out to investigate the thermal and flow fields of a two-dimensional vented cavity subjected forced convection turbulent flow. The with three distinct configurations inlet outlet ports having different cases top surfaces, i.e. flat, semi-elliptical semi-circular studied numerically for range Reynolds numbers. objective is effect curved wall surface on heat transfer ...

In this study, the convective heat transfer and pressure drop in laminar flow of Al2O3/water and CuO/water nanofluids through square and triangular cross-sectional ducts have been numerically investigated using new technique. It has been assumed that there is constant heat flux boundary condition at walls. In addition, to include the presence of nanoparticles, the dispersion model has been used...

In a polymer membrane fuel cell more than half of the chemical energy of hydrogen is converted to heat during generation of electricity. This causes an increase in the cell temperature. The Cooling field design has a significant role in cell cooling. The cell's performance and stability are reduced due to inappropriate heat dissipation. In this paper, the cooling flow and heat transfer in cooli...

We investigate the steady-state fluid--structure interaction between a Newtonian fluid flow and deformable microtube in two novel geometric configurations arising recent microfluidics experiments. The first configuration is cylindrical fluidic channel surrounded by an annulus of soft material with rigid outer wall, while second one extruded from rectangular slab material. In each configuration,...