Numerical Optimization of Rib Shape to Enhance Turbulent Heat Transfer

초록

The present work performed numerical optimizations coupled with Reynolds-averaged Navier-Stokes analysis of flow and heat transfer for design of rib-roughened surface in case of single surface roughened in two-dimensional channel. Standard k-e model is used as a turbulence closure. The objective function is defined as a function of heat transfer coefficient and friction drag coefficient with weighting factor. And, the ratio of width to height of the rib and the ratio of pitch to the height are selected as design variables. Three different weighting factors are tested. In case of double design variable, the histories of design variables and objective function are complicated. However, overall performance of the optimization process is proved quite reliable