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

抑制压降强化传热传质是提高能量装置效率的基础。最近的研究，我们修订了动量和标量传递的控制方程和边界条件，以阐明在充分发展的槽道流动中不同的强化换热的可能场景。在此基础上，根据最优控制理论，确定了壁面吹吸力的时空分布，同时实现了减阻和强化换热。我们还证明了所得到的最优循环在流方向上表现出一个行进的w-live性质。我们最终提出了一种用于不同传热强化的单层膜。

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