Two Phase Flow Particle Separation in a Tank (Pressure Contour) using a Mesh/Meshless Method. Leap-Frog Time Integration Scheme. Lagrangian Particle Tracking (Mesh Method) developed using a Two-Grid Structured/Unstructured Scheme coupled with a sequential cell Particle Tracking to reduce computational cost of the in-cell particle detection. Rendering Perfomed with POV-RAY Tracing Software