numerical wave in capillary flow in vof model

alimondegari · January 14, 2015, 03:18

hi
i am modeling a micro heat pipe in vof fluent with surface tension and wall adhesion. when interface adapts itself to contact angle. a numerical wave from begining and end of the wall start propogating and affect the solution. please help me . how can i remove this wave at interface ?
model: explicit/vof/geo reconstruct
mesh: fine enough

lalith · March 8, 2015, 11:57

Hi Ali
I am wondering if vof is the correct approach to model the working of a micro HP.

I am also trying to model a micro HP but facing the same problem. The wall adhesion just doesn't let the heat pipe action begin.

Also there is a issue of numerical oscillations which with few time steps make the interface go more and more diffuse and difficult to track.

January 14, 2015, 03:18	numerical wave in capillary flow in vof model	#1
alimondegari New Member ali mondegari Join Date: Oct 2013 Posts: 3 Rep Power: 12	hi i am modeling a micro heat pipe in vof fluent with surface tension and wall adhesion. when interface adapts itself to contact angle. a numerical wave from begining and end of the wall start propogating and affect the solution. please help me . how can i remove this wave at interface ? model: explicit/vof/geo reconstruct mesh: fine enough

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
VOF wave getting damped.	arun7328	STAR-CCM+	16	July 8, 2019 15:06
VOF model for bubble flow	usakshi	Fluent Multiphase	0	March 14, 2014 18:54
Modelling capillary forces using the VOF Model	alere	FLUENT	1	October 28, 2013 10:14
VOF wave	hydraulic	STAR-CCM+	4	August 16, 2012 11:55
Natural convection - Inlet boundary condition	max91	CFX	1	July 29, 2008 20:28

March 8, 2015, 11:57		#2
lalith New Member syunary Join Date: Aug 2014 Posts: 7 Rep Power: 11	Hi Ali I am wondering if vof is the correct approach to model the working of a micro HP. I am also trying to model a micro HP but facing the same problem. The wall adhesion just doesn't let the heat pipe action begin. Also there is a issue of numerical oscillations which with few time steps make the interface go more and more diffuse and difficult to track.