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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

NUMERICAL INVESTIGATION OF FLOW AND HEAT TRANSFER OF NANOFLUIDS IN WAVY MICROCHANNEL

Pawan K. Singh
Department of Mechanical Engineering, Indian School of Mines Dhanbad, Jharkhand-826004, India

Dilip Singh Naruka
Department of Mechanical Engineering, Indian School of Mines Dhanbad, Jharkhand-826004, India

Abstract

Present study carries out a detailed numerical investigation of flow and heat transfer of nanofluids in wavy microchannel. Two approaches have been chosen in the current work. First one considers the nanofluids as single phase fluid and applies the mixture rule following literature for evaluating properties for the simulation. The second type of modeling is done using the discrete phase approach which involves Eulerian- Lagrangian considerations. The fluid phase is assumed to be continuous and governed by Navier-Stokes equation. The particles are injected in this flow field and the movement of discrete nanoparticles is determined by the Newton's second law which takes into account the body force, hydrodynamic forces, the Brownian and thermophoresis forces. Alumina-water Nanofluids are chosen for the study. The results are compared with DI water. The nanofluids were found to increase the heat transfer compared to water. The parametric study is carried out for different particle concentrations of 1, 3 and 5 vol%. The particle size effect is observed for different particle size of 50 and 150 nm.

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