Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session R15: CFD: Immersed Boundary Methods I
1:50 PM–3:34 PM,
Monday, November 20, 2023
Room: 144C
Chair: M. Houssem Kasbaoui, Arizona State University
Abstract: R15.00004 : A coupling VOF/embedded boundary method to model two phase flows on arbitrary solid surfaces: Application to phase change
2:29 PM–2:42 PM
Presenter:
MATHILDE B TAVARES
(LadHyX, Ecole polytechnique)
Authors:
MATHILDE B TAVARES
(LadHyX, Ecole polytechnique)
Christophe Josserand
(CNRS)
Stephane Popinet
(Sorbonne Université and CNRS, Institut Jean Le Rond d'Alembert UMR 7190, F-75005 Paris, France)
Alexandre Limare
(Sorbonne University)
JOSE M LOPEZ HERRERA
(Seville University, Spain)
The method relies on the coupling of two methods: the Volume of fluid (VOF) dedicated to two phase flow and the embedded boundary desingned to sharply resolve arbitrary solid geometries.
A non trivial coupling of these two approaches is presented in details within our framework accounting for the solving of partial differential equation with Cartesian structured grids and possible adaptive quad/octree spatial discretization.
First, we have proposed a geometrical contact angle model to ensure the boundary condition when the fluid-fluid interface intersects a solid surface and the hybrid method has been validated with several test cases namely the spreading of a droplet on a cylinder or the capillary rise problem.
The ability of our method to resolve contact line for different solid geometries is also demonstrated in either static or dynamical situations.
The hybrid VOF/embedded boundary method is also use to tackle phase change problems with a physcial application: the freezing droplet. To simulate the phase change, we solve the heat equation and an additional set of equations (level-set) is solved to allow the solid to move.
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