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Impact of Thermal Contact Resistance on Thermal-Hydraulic Characteristics of Double Fin-and-Tube Heat Exchanger
, N.K. Dwivedi
Published in Springer Science and Business Media Deutschland GmbH
Pages: 187 - 197
In the present work, the thermal contact resistance in a double fin-and-tube heat exchanger is investigated using multiphysics numerical approach. A three-dimensional (3D) Computational Fluid Dynamic (CFD) model is constructed in commercial software COMSOL Multiphysics® by coupling steady-state conjugate heat transfer and turbulent fluid flow. The impact of contact resistance at the fin and tube interface is analyzed by quantitatively evaluating the thermal-hydraulic characteristics. It is found that contact resistance of 3.3 × 106 Km2/W can reduce the overall performance by approximately 6% when compared without thermal resistance at the contact interface. The developed model can predict the effectiveness of the fin-and-tube heat exchanger design with or without thermal contact resistances. Furthermore, the model can be employed to improve the overall heat exchanger performance used in various applications. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About the journal
JournalData powered by TypesetLecture Notes in Mechanical Engineering
PublisherData powered by TypesetSpringer Science and Business Media Deutschland GmbH