Computational study on effects of generatrices on heat transfer enhancement in diverging converging tubes
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Graphical Abstract
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Abstract
Using the twodimensional symmetric incompressible laminar N-S equation, a numerical study of heat transfer characteristics of divergingconverging tubes with different generatrices is carried out with the finite volume method and SIMPLE algorithm. Three typical velocity and temperature profiles are specified at the inlet, i.e. uniform, linear and parabolic distributions. Effects of different inlet profiles and generatrices of divergingconverging tubes on heat transfer enhancement characteristics are studied. Variations of laminar and turbulent convective heat transfer characteristics in these tubes with different generatrices are obtained. Under the given conditions, a more appropriate generatrix is obtained through optimizing the heat transfer performance of the divergingconverging tube.
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