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US 8,577,659 B2Granted
Method for simulating dispersed bubble flow
AssigneeSeoul National University
InventorsDoyub Kim, Oh-Young Song, Hyeong-Seok Ko
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Abstract
A simple and efficient method for simulating dispersed bubble flow is provided. Instead of modeling the complex hydrodynamics of numerous small bubbles explicitly, the method approximates the average motion of these bubbles using a continuum multiphase solver. The subgrid interactions among bubbles are computed using a new stochastic solver. Using the proposed scheme, complex scenes with millions of bubbles can be simulated efficiently.
Claims13
A method for simulating dispersed bubble flow, the method comprising steps of:
- representing gas and liquid volumes using a level set surface on a grid mesh comprising a plurality of grid cells;
- representing a plurality of dispersed bubbles with a plurality of spherical particles in the grid mesh;
- modeling a gas-liquid dynamics of the plurality of dispersed bubbles of the gas and liquid volumes by assuming viscous incompressible two-phase flow, wherein the gas-liquid dynamics is governed by an incompressible Navier-Stokes equation and a mass conservation equation;
- converting information from both a level set for capturing and tracking a gas-liquid interface and the plurality of dispersed bubbles to a fraction field using a Heaviside function;
- discretizing a pressure Poisson equation resulting from the incompressible Navier-Stokes equation and the mass conservation equation;
- computing pressure and viscosity for surrounding faces between two neighboring grid cells of the plurality of grid cells across the grid mesh;
- advecting the plurality of dispersed bubble particles according to velocity field;
- modeling bubble-bubble interactions as a discrete random walk and determining a direction of a bubble using a Schlick phase function;
- updating states of the plurality of bubbles;
- and
- displaying the plurality of bubbles on a display.
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Dependencies are inferred from the claim text.