|November 2, 2011, 10:44||
Phase field: calculation of the |grad f| div(grad f/|grad f|) term
Join Date: Jun 2009
Posts: 30Rep Power: 9
The equation i've to solve (Y.Sun,C. Beckermann, Sharp interface tracking using phase-field equation, Journal of computational physics) is:
df/dt+V*grad f=a*[ laplacian f+f*(1-f)/b-|grad f| div [ grad f/|grad f|]]
with a,b parameters (or constants).
how can I calculate the "|grad f| div(grad f/|grad f|) " term in an esplicit way in OF?
This is how I discretised the equation (except the term i'm talking about) neglecting, for the moment, the transport term:
f=phase and ophase is the old time step value of the field (i know i can use ddt directly but i need to perform some coupling later so i prefer to be "free" to discretise by myself the temporal derivative)
Last edited by Alucard; November 2, 2011 at 12:16.
|Thread||Thread Starter||Forum||Replies||Last Post|
|problem in Phase Field firstname.lastname@example.org||Main CFD Forum||6||February 16, 2011 13:20|
|how 2 freeze 1 phase flow field & start lagrangian||KK||CFX||5||February 14, 2008 17:48|
|Electric Field calculation||JamesT||Phoenics||5||May 31, 2007 04:44|
|phase field or Cahn-Hilliard method||dusky.he||Main CFD Forum||3||February 2, 2006 17:43|
|Differences between VOF and phase field||2L||Main CFD Forum||2||July 4, 2004 13:30|