Comparison of Fluid Pressure Evaluation Methods on Structure Surfaces Using the MPS Method

This study evaluates pressure calculation methods for pressure evaluation on wall boundaries in Moving Particle Semi-implicit (MPS) Fluid-Structure Interaction analysis. Particle and polygon wall models are compared using various interpolation and averaging techniques across jet impingement, hydrostatic, and dam-break scenarios. Findings indicate that both wall models yield similar accuracy, with simple averaging preferred for accuracy and simplicity. While polygon walls reduce computation time by over 50% in complex geometries, they may oscillate or underestimate pressure at corners. Conversely, particle walls provide superior stability in unsteady problems despite higher computational costs.