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Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
December, 14-17, 2023, Bihar, India

3D CFD Investigation on Trimmed Annular Fins in Crossflow Heat Exchanger

Get access (open in a dialog) DOI: 10.1615/IHMTC-2023.690
pages 423-427


Numerical analysis was carried out for the flow of air over an array of annular finned tubes. The downstream part of the fin was trimmed in an angular manner to reduce the material requirements. Study was done on the impact of fin spacing and Reynolds number on the thermal and flow properties. The Reynolds stresses terms were modelled using transition SST turbulence model. Results indicate a surge in pressure drop at lower fin spacing. Also, the Nusselt number was the highest at minimum fin spacing. The use of a trimmed fin provided a material savings of nearly 16.6% than the standard case of a complete circular finned tube.