I haven't calculated this in a while and I can't find it in Perry's. Does anyone have the equation to calcuate shear rate in an agitated vessel based on viscoisty, RPM, impeller size type, etc...This is a great site.
Reference # 1 in the linked article above refers to an infamous non-Newtonian mixing article that may help you. It is Metzner AB, Otto RE. Agitation of non-Newtonian fluids. AIChE J. 1957;3:3-10.