Method for generating simulations of fluid interfaces for improved animation of fluid interactions

A computer-implemented method for simulating interactions between two different materials, the computer-implemented method comprising:

• under the control of one or more computer systems configured with executable instructions:
• modeling a primary material as a plurality of objects;
• modeling a secondary material as a grid-based fluid volume completely surrounding the plurality of objects, the fluid volume comprising a layer portion and an outer portion, the layer portion being positioned between the plurality of objects and the outer portion;
• assigning at least one boundary condition to a boundary positioned between the layer portion and the outer portion based at least in part on pressures of the outer portion and configured to affect the layer portion, wherein the at least one boundary condition comprises a pressure boundary condition;
• determining values of motion parameters for the primary material based on the plurality of objects and the layer portion;
• and
• determining values of motion parameters for the secondary material based on the plurality of objects, the layer portion, the at least one boundary condition, independent of the outer portion.