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Simulating Capillary Effect in a heat pipe wick |
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#1 |
New Member
Rahul Ruia
Join Date: Feb 2019
Posts: 4
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I am doing my 8th semester project on heat pipes.
My project mainly involves simulations on ANSYS. I have successfully modelled and meshed ( which is the easier part), I am struggling to incorporate the capillary effect in my wick structure. The heat pipe which I have modelled is a closed system, it contains a vapour flow region enclosed by a wick structure. The wick structure is in turn enclosed by a copper casing. I am using the VOF model into incorporate the multiphase effects, along with the K-Epsilon model . The main problem I am facing is on how to incorporate the capillary effect. I am currently running a simulation with the following settings in the porous zone :- 1) Homogenous Porosity of 0.55 2) I am using only viscous resistance as the flow in the porous region is laminar. I have 3 fluids namely air, water and steam. I have given the same values of viscous resistance for water and steam and higher value for air ( I did this because I did not want air to flow in the porous media). 3) I reversed the direction vectors from 1 to -1 hoping that they will lead to incorporation of the capillary effect. I am running short of time and am in need of help. I am willing to pay, if someone helps me solve my problem. PS : please mail me at ruiarahul5@gmail.com ( for further information) |
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#2 |
New Member
Join Date: Jun 2013
Posts: 2
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I think you need to incorporate a body force (momentum source term) for modeling the capillary effect. This would come from some empirical relation (based on wick properties).
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#3 |
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Amod Kumar
Join Date: Jan 2010
Location: Delhi, India
Posts: 39
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Did you solve the problem? I think you need to activate surface tension and wall adhesion to activate capillary effect.
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