Vof

mohammad.sarfaraz · November 28, 2012, 03:36

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, 10:16

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

Hi.

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

Regards,
Johannes

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).

November 28, 2012, 03:36	Vof	#1
mohammad.sarfaraz Member Mohammad Sarfaraz Join Date: Feb 2010 Posts: 35 Rep Power: 16	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

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December 4, 2012, 10:16		#2
dmilano Member Join Date: Mar 2012 Posts: 72 Rep Power: 14	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.

July 15, 2014, 03:52		#3
jk75 New Member Johannes Köpf Join Date: May 2009 Location: Germany Posts: 29 Rep Power: 16	Hi. is there a 'rule of thumb' of when to use wich method? Regards, Johannes

July 15, 2014, 10:13		#4
dmilano Member Join Date: Mar 2012 Posts: 72 Rep Power: 14	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).