Numerical simulation of visco-plastic fluid flow between two parallel plates with triangular obstacles

Obstruction of transfer lines in pipes and ducts or heat exchangers due to the sedimentation of solid particles or interference of outer objects can cause many problems and in severe cases total blockage of the transfer systems. In this research the flow of visco-plastic fluid is simulated between two flat plates with triangular obstacles numerically. Numerical findings suggest that with increasing the flow index, the intensity of vortices after obstacles diminishes in both cases of shear thinning and shear thickening states of the material. Furthermore, a method have been used to determine a constant viscosity of the fluid in each point and instance of the simulation and as the results the Reynolds numbers are obtained as a criteria of the flow instability. Basic numerical results are validated with empirical findings.