Pressure field of flow past cylinder



disk This image depicts the pressure field around a circular obstacle in a single-phase flow simulation involving fluid-structure interaction (FSI). The central gray circle represents a solid structure immersed in the fluid, where a high-pressure region forms upstream (red/yellow) due to flow stagnation, and a low-pressure wake develops downstream (blue), indicating flow separation. The resulting pressure gradient around the body contributes to drag forces and potentially induces structural deformation. The asymmetric distribution in the wake suggests unsteady behavior, such as vortex shedding. This visualization highlights the strong coupling between fluid dynamics and structural response in external FSI scenarios.