Entropy generation of radiation effect on laminar-mixed convection along a wavy surface |
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Authors: | Cha’o-Kuang Chen Yue-Tzu Yang Kuei-Hao Chang |
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Institution: | (1) Department of Mechanical Engineering, National Cheng-Kung University, 701 Tainan, Taiwan, ROC |
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Abstract: | The effects of thermal radiation on laminar-forced and free convection along the wavy surface are studied. The optically thick
limit approximation for the radiation flux is assumed. A modified form for the entropy generation equation is derived. The
effect of geometry (e.g. flat surface, wavy surface), fluid friction and heat transfer (e.g. convection and radiation effects)
are all included in the modified entropy generation form. Prandtl’s transposition theorem is used to stretch the ordinary
coordinate system in certain directions. The wavy surface can be transformed into a calculable planar coordinate system. The
governing equations are derived from the complete Navier–Stokes equations. A simple transformation is proposed to transform
the governing equations into boundary layer equations for solution by the cubic spline collocation method. |
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Keywords: | |
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