Convection¶
Some numerical methods, most notaby the algebraic Volume of Fluid method for interface capturing in free surface flows, require the selection of a convective flux.
Upwind¶
The simplest flux for the colour function is pure upwind. This flux leads to a very diffusive free surface when used with a piecewise constant VOF colour function.
convection:
c:
convection_scheme: Upwind
HRIC¶
High Resolution Interface Capturing. A compressive flux designed to be used in combination with a piecewise constant VOF colour function.
Three versions are implemented
Standard HRIC (HRIC, default, the only one that is well tested) 2
Modified HRIC (MHRIC, practically untested code, use with caution) 1
Refined HRIC (RHRIC, practically untested code, use with caution) 3
convection:
c:
convection_scheme: HRIC
HRIC_version: HRIC # <-- not needed, HRIC is default
CICSAM¶
Compressive Interface Capturing Scheme for Arbitrary Meshes. A compressive flux designed to be used in combination with a piecewise constant VOF colour function.
“Numerical prediction of two fluid systems with sharp interfaces”, Imperial College, London, 1997, Onno Ubbink
convection:
c:
convection_scheme: CICSAM
Citations
- 1
ANSYS. Fluent v. 15.0 Theory Manual. ANSYS Inc., 2013.
- 2
Samir Muzaferija, Milovan Peric, Pierre C. Sames, and Thomas E. Schellin. A two-fluid Navier-Stokes solver to simulate water entry. In Proceedings from the 22nd symposium on naval hydrodynamics, 277–289. 1998.
- 3
II-Ryong Park, Kwang-Soo Kim, Jin Kim, and Suak-Ho Van. Numerical simulation of free surface flow using a refined HRIC VOF method. Journal of the Society of Naval Architects of Korea, 47(3):279–290, 2010. doi:10.3744/SNAK.2010.47.3.279.