Patent ID: 7536285

Claim:
A process of simulating motion of a first fluid, a second fluid and an interface between the first fluid and the second fluid comprising the steps of: calculating fluid velocities and pressures of the first and second fluids at a first set of nodes on a first mesh at a first time step, representative of movement of the first and second fluids at the first time step; calculating a level set, representative of a position of the interface at the first time step, at a second set of nodes on a second mesh which is odd times finer than the first mesh; calculating a central difference of the level set on the second set of nodes along a first axis; calculating a forward difference of the level set on the second set of nodes along the first axis; calculating a backward difference of the level set on the second set of nodes along the first axis; calculating a limiting derivative of the level set on the second set of nodes along a first axis; calculating a second order limiting derivative on the second set of nodes along a first axis; calculating a tangential derivative term on a second set of nodes along a second axis; calculating new fluid velocities and pressures of the first and second fluids at the first set of nodes at a second time step, representative of new movement of the first and second fluids at a second time step; and calculating a new level set at the second set of nodes, representative of a new position of the interface at the second time step.