cfd fluent simulation of heatpipe

rajesh_3114042@yahoo.com · January 23, 2013, 19:33

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 · January 24, 2013, 04:47

So what exactly is your question?

msaeedsadeghi · January 24, 2013, 07:56

There is no need of using multiphase in heatpipe modeling

mecman · July 23, 2013, 18:48

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 · October 17, 2013, 03:56

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 · April 28, 2015, 06:43

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 · November 7, 2015, 15:07

Quote:

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

January 23, 2013, 19:33	cfd fluent simulation of heatpipe	#1
rajesh_3114042@yahoo.com New Member rajesh reddy Join Date: Jan 2013 Posts: 1 Rep Power: 0	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

January 24, 2013, 04:47		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 27	So what exactly is your question? __________________ The skeleton ran out of shampoo in the shower.

January 24, 2013, 07:56		#3
msaeedsadeghi Senior Member SSL Join Date: Oct 2012 Posts: 226 Rep Power: 15	There is no need of using multiphase in heatpipe modeling majid2015 likes this.

October 17, 2013, 03:56	multiphase flow -superheated steam	#5
mari009 New Member Muthu Join Date: Feb 2012 Location: chennai Posts: 4 Rep Power: 14	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 ...

April 28, 2015, 06:43	Heat Pipe Simulation in Fluent	#6
k.vedprakash New Member Join Date: Apr 2015 Posts: 2 Rep Power: 0	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

July 23, 2013, 18:48		#4
mecman Member Mohammad Bahreini Join Date: Dec 2012 Posts: 36 Rep Power: 14	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

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