This work presents a high-fidelity in-house Fluid Structure Interaction (FSI) solver devel-
oped by combining discrete forcing Immersed Boundary Method (IBM) with a RK-4 based structural
solver. Classification of the grid points as fluid, solid and IB points in the IBM framework and the
solution of the pressure correction equations are the two most computationally expensive section in the
numerical solver. These computational efforts can be significantly reduced by implementing OpenMP
techniques. However, the successive over-relaxation (SOR) iterative method used in the serial code is not
suitable for OpenMP parallelization as it shows data dependencies from previous iterations. Therefore,
the Red-Black (RB) SOR is implemented to avoid the data dependencies.