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About the 3D IBM Bow Shock CFD Simulation Project
This simulation demonstrates a 3D supersonic bow shock over a sphere using the NumericalAI (https://numericalai.net/). When a body moves through a compressible fluid at supersonic speed (Mach > 1), disturbances cannot propagate upstream. As a result, a detached bow shock forms ahead of blunt bodies such as spheres. Across the shock, the flow undergoes an abrupt increase in pressure, temperature, and density, along with a decrease in velocity. The shock stand-off distance and curvature depend primarily on Mach number and body geometry. • Mach ≈ 2 freestream • 3D sphere (slip wall) • Grid: 384 × 192 × 192 • WENO5 + RK3 time integration • HLLC Riemann solver • Re ≈ 7.5 × 10⁶ The simulation captures a stable detached bow shock with correct curvature, symmetric structure, and a developing wake region downstream. This setup serves as a clean reference case for compressible IBM and shock-capturing validation.
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