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Prof. Hassan Fawzy Mohamed Elattar :: Publications:

Title:
Numerical investigation of heat transfer in annulus laminar flow of multi tubes-in-tube helical coil
Authors: S. A. Nada, H. F. Elattar, A. Fouda, H. A. Refaey
Year: 2018
Keywords: Not Available
Journal: Heat Mass Transfer
Volume: 54
Issue: Not Available
Pages: 715–726
Publisher: Springer
Local/International: International
Paper Link: Not Available
Full paper Hassan Fawzy Mohamed Elattar_Numerical investigation of heat transfer in annulus laminar.pdf
Supplementary materials Not Available
Abstract:

In the present study, a CFD analysis using ANSYS-FLUENT 14.5 CFD package is used to investigate the characteristics of heat transfer of laminar flow in annulus formed by multi tubes in tube helically coiled heat exchanger. The numerical results are validated by comparison with previous experimental data and fair agreements were existed. The influences of the design and operation parameters such as heat flux, Reynolds numbers and annulus geometry on the heat transfer characteristics are investigated. Different annulus of different numbers of inner tubes, specifically 1, 2, 3, 4 and 5 tubes, are tested. The Results showed that for all the studied annulus, the heat flux has no effect on the Nusselt number and compactness parameter. The annulus formed by using five inner tubes showed the best heat transfer performance and compactness parameter. Correlation of predicting Nusselt number in terms of Reynolds number and number of inner tubes are presented.

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