Two-way coupled SPH and particle level set fluid simulation.

Area of Science:

• Computational fluid dynamics
• Multiphase flow simulation

Background:

• Grid-based methods struggle with small-scale fluid features.
• Adaptive methods offer partial solutions but require separate techniques for diffuse phenomena like sprays and foam.

Purpose of the Study:

• To develop a unified simulation framework for both dense and diffuse fluid regions.
• To enable efficient and accurate simulation of complex fluid behaviors, including sprays and foams.

Main Methods:

• Utilizing the particle level set method for dense liquid volumes.
• Employing a novel smoothed particle hydrodynamics (SPH) method for diffuse regions like sprays.
• Implementing a two-way coupled simulation framework integrating both methods.

Main Results:

• Successfully simulated dense and diffuse water volumes within a single framework.
• Integrated particles from the particle level set method into the SPH simulation.
• Achieved two-way mixing between SPH-simulated dense volumes and grid-based liquid representations.

Conclusions:

• The proposed framework effectively addresses limitations of traditional grid-based methods for small-scale phenomena.
• This approach allows for accurate simulation of sprays, foams, and their interaction with dense liquids.
• Offers a more comprehensive solution for complex multiphase flow simulations.