Mixing enhancement in binary fluids using optimised stirring strategies
Mixing enhancement in binary fluids using optimised stirring strategies
复制标题
使用优化的搅拌策略增强二元流体的混合
DOI:
10.1017/jfm.2020.448
复制
发表时间:
2019
影响因子:
3.7
通讯作者:
P. Schmid
中科院分区:
文献类型:
--
作者:
Maximilian F. Eggl;P. Schmid
Abstract Mixing of binary fluids by moving stirrers is a commonplace process in many industrial applications, where even modest improvements in mixing efficiency could translate into considerable power savings or enhanced product quality. We propose a gradient-based nonlinear optimisation scheme to minimise the mix-norm of a passive scalar. The velocities of two cylindrical stirrers, moving on concentric circular paths inside a circular container, represent the control variables, and an iterative direct–adjoint algorithm is employed to arrive at enhanced mixing results. The associated stirring protocol is characterised by a complex interplay of vortical structures, generated and promoted by the stirrers’ action. Full convergence of the optimisation process requires constraints that penalise the acceleration of the moving bodies. Under these conditions, considerable mixing enhancement can be accomplished, even though an optimum cannot be guaranteed due to the non-convex nature of the optimisation problem. Various challenges and extensions of our approach are discussed.
DOI:
10.1103/physreve.86.026306
发表时间:
2012
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
Foures DP
通讯作者:
Foures DP
影响因子:
1.6
作者:
R. S. Blumenthal;A. K. Tangirala;R. I. Sujith;W. Polifke
通讯作者:
W. Polifke