Raj Kamal Tiwari

Bio: Raj Kamal Tiwari is an academic researcher from Tata Motors. The author has contributed to research in topics: Convection & Combined forced and natural convection. The author has an hindex of 1, co-authored 2 publications receiving 1407 citations. Previous affiliations of Raj Kamal Tiwari include Indian Institute of Technology Guwahati.

Transient Mixed Convection in a Two-Sided Lid-Driven Differentially Heated Square Cavity Utilizing Nanofluids

Abstract: Transient behaviour of mixed convection inside a two-sided lid-driven differentially heated square cavity filled with nanofluids is investigated numerically to gain insight into convective recirculation and flow processes evolved with time. A model is developed to analyse the behaviour of nanofluids taking into account the solid volume fraction (π). The transport equations are solved numerically using the finite volume approach and a SIMPLE algorithm on a non-staggered grid with deferred QUICK scheme. Comparisons with previously published work are performed and found to be in excellent agreement. The solution procedure is moved with small values of τ so that a transient behaviour can be captured. Richardson number, Ri = Gr/Re2, a measure of relative importance of natural and forced convection modes on the heat transfer, is taken as 1 so that the phenomena of mixed convection can be understood effectively. Copper—water nanofluid is used with Pr = 6.2 and solid volume fraction π is varied as 0.0, 0.08, and ...

Finite difference solution of mhd radiative boundary layer flow of a nanofluid past a stretching sheet

Abstract: Unsteady heat and mass flow of a nanofluid past a stretching sheet with thermal radiation in the presence of magnetic field is studied. To obtain non-similar equation, continuity, momentum, energy and concentration equations have been non-dimensionalised by usual transformation. The non-similar solutions are presented here which depends on the Magnetic parameter M respectively . The obtained equations have been solved by explicit finite difference method. The temperature and concentration profiles are discussed for the different values of the above parameters with different time steps.

A review on nanofluids - part II: experiments and applications

Abstract: Research in convective heat transfer using suspensions of nanometer-sized solid particles in base liquids started only over the past decade. Recent investigations on nanofluids, as such suspensions are often called, indicate that the suspended nanoparticles markedly change the transport properties and heat transfer characteristics of the suspension. This second part of the review covers fluid flow and heat transfer characteristics of nanofluids in forced and free convection flows and potential applications of nanofluids. Opportunities for future research are identified as well. Keywords: Nanofluids; Nanoparticles; Heat transfer; Thermal conductivity.