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This work presents a robust and efficient sharp interface immersed boundary(IBM) framework, which is applicable for all-speed flow regimes and is capableof handling arbitrarily complex bodies (stationary or moving). The work deploysan in-house, parallel, multi-block structured finite volume flow solver, whichemploys a 3D unsteady Favre averaged Navier Stokes equations in a generalizedcurvilinear coordinate system; while we employ a combination of HCIB (HybridCartesian Immersed boundary) method and GC(Ghost-cell) for solutionreconstruction near immersed boundary interface. A significant difficulty forthese sharp interface approaches is of handling sharp features/edges of complexgeometries. In this study, we observe that apart from the need for robust nodeclassification strategy and higher order boundary formulations, the directionin which the reconstruction procedures are performed plays an important role inhandling sharp edges. Taking this into account we present a versatile interfacetracking procedure based on ray tracing algorithm and a novel three stepsolution reconstruction procedure that computes pseudo-normals in the regionswhere the normal is not well-defined and reconstructs the flow field alongthose directions. We demonstrate that this procedure enables solver toefficiently handle and accurately represent sharp-edged regions. A fifth-orderweighted essentially non-oscillatory (WENO) scheme is used for capturingshock-induced discontinuities and complex fluid-solid interactions with highresolution. The developed IBM framework is applied to a wide range of flowphenomena encompassing all-speed regimes (M=0.001 to M = 2.0). A total of sevenbenchmark cases (three stationary and four moving bodies) are presentedinvolving various geometries (cylinder, airfoil, wedge) and the predictions arefound to be in excellent agreement with the published results.

A Novel Sharp Interface Immersed Boundary Framework for Viscous Flow Simulations at Arbitrary Mach Number Involving Complex and Moving Boundaries