Applying  SHARP Interface Scheme in the Immersed Boundary- Lattice Boltzmann Method

In the current study، the non-Newtonian fluid flow over a circularcylinder has been simulated using the Immersed Boundary – lattice Boltzmann method. In order to couple the Lagrarigian nodes on Immersed Boundary and Eulerian nodes in the fluid domain، the direct forcing method based on sharp interface scheme is employed. The split-forcing lattice Boltzmann method is used to apply the effects of boundary force on non-Newtonian power-law fluid which leads to more monotonic force implantation in times interval. The impact of numerical parameters on the accuracy of the introduced method has been investigated in details. The different fluid regimes consist of steady and unsteady flows in different Reynolds numbers and power-law indices has been investigated. The results show that the immersed boundary – lattice Boltzmann method can completely captured the properties of non-Newtonian fluids in presence of Immersed Boundary. In future،this algorithm can be used for modeling of moving bodies in non-Newtonian fluids.