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

        Mojtaba Hosseini,Ali Hatami,Samira Payan 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.1

        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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