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mohammad.sarfaraz November 28, 2012 04:36

hi there
What is the difference and application of these options?
1) one fluid, free surface
2) Unsplit Lagrangian
3) Split Lagrangian

thanks in advanced

dmilano December 4, 2012 11:16

These options are just different ways of moving the free surface. (1) simply fluxes fluid into the neighbor cells while (2) and (3) try to move the surface directly.

jk75 July 15, 2014 03:52


is there a 'rule of thumb' of when to use wich method?


dmilano July 15, 2014 10:13

The default methods ("automatic") usually work best for most problems. The Lagrangian methods are useful if, for some reason, the default methods are not performing well (e.g., you see unacceptable convective volume error attributable to the VOF advection method).

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