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Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)


ISBN Онлайн: 978-1-56700-478-6

LAMINAR FLUID FLOW AND HEAT TRANSFER CHARACTERISTICS OF WAVY MICROCHANNELS WITH WALL PHASE SHIFT

DOI: 10.1615/IHMTC-2017.2860
pages 2033-2040

Angshuman Bhardwaj
Department of Aerospace Engineering Indian Institute of Space Science and Technology Thiruvananthapuram, Kerala, India - 695547

Mithun Krishna P. M
Department of Aerospace Engineering Indian Institute of Space Science and Technology Thiruvananthapuram, Kerala, India - 695547

Deepu M
Department of Aerospace Engineering Indian Institute of Space Science and Technology Thiruvananthapuram, Kerala, India - 695547

Shine S. R
Department of Aerospace Engineering Indian Institute of Space Science and Technology Thiruvananthapuram, Kerala, India - 695547

Аннотация

The present study numerically investigates the influence of wall phase shift on the thermal-hydraulic behaviour of steady laminar fluid flow in a sinusoidal wavy walled microchannel. A 3D conjugate analysis has been carried out with 7 different configurations, having wall phase shifts, φ = 0°,30°,45°,60°,90°,135° and 180°, over a low Re range of 50 to 200. The channel is considered to be made of copper and water is taken as the working fluid. The numerical schemes have been successfully validated with experimental results from past studies of flow in micro-channels. It has been observed that in the low Re regime, φ = 60° channel has the best heat transfer characteristics. As the Re increases, φ = 0° has been found to perform better. The increase in heat transfer coefficient at φ = 60° is attributed to the increase in strength of the dean vortices causing better mixing of flow due to asymmetry of the channel walls.