Heat transfer in tube assemblies under conditions of laminar axial,transverse and inclined flow |
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Authors: | K.A. Antonopoulos |
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Affiliation: | 1. National Technical University of Athens, Mechanical Engineering Department, Thermal Section, 42 Patission Street, Athens 106 82, Greece |
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Abstract: | This paper considers laminar flow heat transfer in tube assemblies. The main interest is focused on the virtually unexplored cases of heat transfer under conditions of fully-developed flow inclined to the axes of the tubes and of purely transverse developing flow. The limiting cases of purely axial or purely transverse fully-developed flow are also examined. In all cases, the thermal boundary condition on the tubes is constant heat flux. Governing differential equations are expressed in terms of curvilinear-orthogonal coordinates and solved using finite-differences. Results are compared with available theoretical and experimental data. The effect of the transverse component of the flow on the temperature distribution is found to remain very strong even in nearly-axial flows and therefore considerably higher heat transfer coefficients are exhibited by a nearly-axial flow than a purely axial one. |
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Keywords: | heat transfer laminar flow tube assemblies inclined flow |
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