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Comparison of the effect of laminar and turbulent flow regimes on thermal stresses and strains in an annular fin

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Abstract

We compared the effect of laminar and turbulent flow regimes on thermal stresses and strains in an annular fin. This comparison showed that substituting the laminar flow regime with the turbulent flow regime increases the magnitude of effective stresses and strains but does not change their position. In both regimes, tangential stress was asymmetrical and reached its highest magnitude in the flow front and in the fin base. In both regimes, the fin exhibited a two-dimensional temperature distribution, which causes asymmetric thermal strains, and hence, significant asymmetric thermal stress on the fin. An analysis of the flow surrounding the fin showed that the radial temperature variations do not provide sufficient information for identifying critical regions in terms of radial and tangential stress and thus effective stress. Overall, the results underscore the importance of the analysis of the flow around annular fins for the analysis of their thermal stresses.

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Authors and Affiliations

  1. Faculty of Mathematics, University of Sistan and Baluchestan, Zahedan, Iran

    Mojtaba Hosseini & Ali Hatami

  2. Faculty of Engineering (Shahid Nikbakht Engineering Faculty), Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

    Samira Payan

Authors
  1. Mojtaba Hosseini
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  2. Ali Hatami
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  3. Samira Payan
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Corresponding author

Correspondence to Samira Payan.

Additional information

Recommended by Editor Yong Tae Kang

Mojtaba Hosseini is Ph.D. candidate in applied mathematics at the University of Sistan and Baluchestan. He carried out his thesis in the field of Thermal stresses.

Ali Hatami received his B.S. in Mathematics from Guilan University, Rasht, Iran. His M.Sc. and Ph.D. in Applied Mathematics are from University of Sistan and Baluchestan, Zahedan, Iran. He is currently an Assistant Professor of Applied Mathematics at the University of Sistan and Baluchestan in Zahedan, Iran. He has worked on various subjects in solid mechanics such as application of deformation theories and perturbation methods.

Samira Payan is an Associate Professor of Mechanical Engineering at the University of Sistan and Baluchestan, Iran. She received her B.Sc, M.Sc, and Ph.D. from the University of Sistan and Baluchestan in 2005, 2008, and 2013, respectively. Her main field of interest and expertise is inverse and direct methods in design of thermal systems.

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Hosseini, M., Hatami, A. & Payan, S. Comparison of the effect of laminar and turbulent flow regimes on thermal stresses and strains in an annular fin. J Mech Sci Technol 34, 413–424 (2020). https://doi.org/10.1007/s12206-019-1240-y

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  • DOI: https://doi.org/10.1007/s12206-019-1240-y

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