Optimization of a Kenics static mixer for non-creeping flow conditions

Computational Fluid Dynamics (CFD) has been employed for the optimization o f the mixing efficiency of a Kenics static mixer. A series of numerical sim ulations has been undertaken for non-creeping flow conditions to determine the optimal twist angle of the mixing elements. The mixer efficiency has be en assessed by considering the computed pressure drop along the mixer and t he size of the fluid structures remaining at the mixer outlet. Contrary to the results of previous investigations for creeping flows, it is shown that for the present non-creeping Bow conditions, the twist angle of 180 degree s employed in the standard Kenics design is optimal. It is demonstrated tha t CFD provides an invaluable tool for mixer design optimization, despite th e significant computational resources necessary to undertake the present st udy. (C) 1999 Elsevier Science S.A. All rights reserved.