Optimal Dissimilar Control for Heat Transfer Enhancement and Friction Drag Reduction in Wall Turbulence

通过抑制压降来增强传热传质对提高能源装置的效率具有重要意义。在本研究中，我们重新审视了动量和标量传递的控制方程和边界条件，以澄清在完全发展的通道流动中不同传热增强的可能情况。在此基础上，基于最优控制理论，通过确定壁面吹风/吸力的时空分布，证明了同时实现摩擦阻力减少和传热增强。我们还证明了所得到的最优混合物在顺流方向上具有行进w-活态保持特性。我们最终提出了一种简单的不同传热强化策略

Enhancing heat and mass transfer with suppressing pressure drop is fundamentallyimportant for improving efficiencies of energy devicetsh.eIpnresent study, we revisitthe governing equations and boundary conditions for momentum and scalar transfer in order to clarify possible scenarios for dissimilar heat transfer enhancement in a fullydeveloped channel flow. Based on these knowledgef,irswtedemonstrate simultaneousachievement of friction drag reduction and heat transfer enhancement by determining the spatio-temporal distribuion of wall blowing/suction based on the optimal control theory. We also show that the resultant optimal cionpturtol exhibits a traveling w-alivkeeproperty in the streamwise direction. We eventually propose a si-mlpoloep for dissimilar heat transfer enhancement.ospternategy