[rajesh_3114042@yahoo.com]

hi i am unable to simulate the heat pipe in fluent which has two phase flow is it required to give pressure outlet also for multi phase i am unable to use the porous zone too

[RodriguezFatz]

So what exactly is your question?

[msaeedsadeghi]

There is no need of using multiphase in heatpipe modeling

[mecman]

hi all
i want simulate heat pipe with fluent,any body know how simulate this case in fluent?i know i must use VOF model for this,but i cant simulate boiling in pipe...
pls help regard

[mari009]

Hii Everyone...
I am using multi-phase mixture model.. my fluid are superheated steam(as a primary phase) and water-liquid (as a secondary phase). The problem was property of steam(enthalpy) wat i need supposed to get is not getting

(for e.g) In my boundry condition enthalpy value of a steam from a steam table is h=3000kj/kg but wat i am getting from cfd results is nearly h=1200kj/kg...
how to fix the problem ...

[k.vedprakash]

Hello guys,

i am trying to design a heat pipe in ansys fluent.
temperatures at evaporator and condensor are 50degree and 25 degree respectively.
liquid fillinf ratio is 70%.

so here are the conditions i gave in my simulation.
i chose double precision, transient pressure based solver.

model- multiphase-volume of fluid with energy equation on.

In phase interaction - mass - number of transfer mechanisms - 1
Evaporation-condensation with both 0.1 frequency
and saturation temperature of 320K.
Surface tension of 0.072 n\m with wall Adhesion.

Boundary Conditions - Evaporator as Pressure inlet
Guage pressure: 0
Initial Guage Pressure: 0
Temp: 350K

Condensor as Pressure outlet
Guage pressure: 0
Back flow temperature: 0

Adiabatic as Wall
No slip wall
contact Angle: 70


I am not getting any proper result with these conditions. Rest all are kept default values.

Please Anyone of you guys are familiar with the design, it would be great if you could help me

[majid2015]

Originally Posted by msaeedsadeghi

There is no need of using multiphase in heatpipe modeling

hello msaeedsadeghi
i am simulating heat pipe with one phase, i have problem in simulating porous wick,the capillary driven flow, can you help?
best regards