Multiple-relaxation-time lattice Boltzmann simulation of non-Newtonian flows past a rotating circular cylinder

► The power-law fluid flow around a rotating cylinder is studied numerically. ► Lattice Boltzmann method with multi-relaxation-time collision model is used. ► Increasing the rotational speed will decrease drag coefficient. ► Increasing the power-law index will increase length and width of the wake. ► Vortex shedding pattern disappears beyond a threshold rotational speed.