Mass/Heat Transfer Enhancement Model for Boundary Layer Control Analysis

作     者：Ridwan Setiawan Pesila Ratnayake Jie Bao 

作者机构：School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia 

出 版 物：《IFAC Proceedings Volumes》 

年 卷 期：2014年第47卷第3期

页      面：7025-7030页

主　　题：Modeling Distributed Parameter Systems Chemical Process Control 

摘      要：Flow control has recently become an attractive technique to manipulate the behavior of fluid flow to achieve either mixing enhancement or the stabilization of turbulent flow. While it is understood that the location where mixing occurs is important, existing studies on mixing enhancement are limited to the hydrodynamics without considering the direct effect on mass/heat transfer improvement. This paper presents a reduced-order model for mass transfer equation which allows the analysis of the effect of an external actuation on mass transfer enhancement in a channel flow. When Reynolds number and temporal frequency of the external force are low, the effect of a forced wall slip velocity on the overall flow profile in a channel can be approximated by its instantaneous component. The estimated concentration profiles from the reduced-order model are in good agreement with CFD simulations. The key feature of the reduced-order model proposed in this paper is that it allows system analysis and control design to be performed by considering both spatial and temporal variables simultaneously.