A Sharp-Interface Approach Based on Ghost Fluid Method for Compressible Two-Phase Flows

This work presents a non-mixture approach based on the ghost-fluid method (GFM) for simulating compressible multiphase flows with the goal of achieving enhanced accuracy and efficiency on coarse computational meshes. Building upon the classical GFM approach, a narrow-band level-set method is developed by introducing a modified Hamilton-Jacobi equation. The method has demonstrated fast convergence during the reinitialization process and preserves the interface geometry by imposing essential numerical conditions. The numerical implementation details and initial validation results demonstrate the effectiveness of the proposed enhancements in capturing complex interfacial phenomena.