Abstract
SummaryIn this paper, we introduce numerical methods that can simulate complex multiphase flows. The finite volume method, applying Cartesian cut‐cell is used in the computational domain, containing fluid and solid, to conserve mass and momentum. With this method, flows in and around any geometry can be simulated without complex and time consuming meshing. For the fluid region, which involves liquid and gas, the ghost fluid method is employed to handle the stiffness of the interface discontinuity problem. The interaction between each phase is treated simply by wall function models or jump conditions of pressure, velocity and shear stress at the interface. The sharp interface method “coupled level set (LS) and volume of fluid (VOF)” is used to represent the interface between the two fluid phases. This approach will combine some advantages of both interface tracking/capturing methods, such as the excellent mass conservation from the VOF method and good accuracy of interface normal computation from the LS function. The first coupled LS and VOF will be generated to reconstruct the interface between solid and the other materials. The second will represent the interface between liquid and gas.
Highlights
Simulating multiphase and multimaterial flows is some of the most challenging problems in computational fluid dynamics due to the presence of numerous phases or materials and to the difficulty of interface treatment
We present no validation with experimental data, but rather try to test the capability of our numerical method to predict physical phenomena caused by a solid object moving freely on a fixed grid
We have introduced a numerical approach for generic three phase flow, including two fluids and one solid
Summary
Simulating multiphase and multimaterial flows is some of the most challenging problems in computational fluid dynamics due to the presence of numerous phases or materials and to the difficulty of interface treatment. The boundary condition may be represented by inserting body force terms into the cell containing solid so that the nonslip condition will be satisfied.[1,2,3,4] Other methods like the ghost cell approach[5,6,7] define a virtual layer of nodes, which are located inside the body and have at least one adjacent cell in the fluid computational domain. The flow field variables at the ghost nodes are computed based on these values at the neighboring cells and the boundary condition applying on the body surface.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal for Numerical Methods in Fluids
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
