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-   -   Heat pipe Simulation (http://www.cfd-online.com/Forums/fluent/89129-heat-pipe-simulation.html)

Heat Pipe June 6, 2011 04:33

Heat pipe Simulation
 
Hi all,
recently, I got project to do simulation for it this project was multi-phase flow heat pipe vapor in core and water in wick structure and the heat pipe consist of 3 sections ( evaporator, adiabatic and condenser ), evaporator adding heat and condenser reject the heat .
my question is how 2 set these with Fluent

Heat Pipe June 6, 2011 14:33

Hi friends no-body is expert in my case pls necessary ????

amir_4883 June 6, 2011 15:04

Quote:

Originally Posted by Heat Pipe (Post 310734)
Hi friends no-body is expert in my case pls necessary ????

Hi if you find it ,please sent me ,i similar you try to solve heat pipe problems ,
i have a lotof file aboute the heat pipe,if you need i can sed for you please send for me your email

Heat Pipe June 7, 2011 03:31

Okay Amir really thanks for ur offer
my e-mail is omer.adnan84@gmail.com

Asghari_M June 7, 2011 05:00

Hi Dear;
I think you must study some published Papers such as Faghri's work and his colleagues i.e. M.B.shafii, Y.Zhang. Just as I memorized They modeled phase change within wicked heat pipe by a CFD approach. However, no accurate method has been still published for this simulation. The model wich they used , in my opinion, is a general approximation.

Heat Pipe June 7, 2011 06:19

Quote:

Originally Posted by Asghari_M (Post 310802)
Hi Dear;
I think you must study some published Papers such as Faghri's work and his colleagues i.e. M.B.shafii, Y.Zhang. Just as I memorized They modeled phase change within wicked heat pipe by a CFD approach. However, no accurate method has been still published for this simulation. The model wich they used , in my opinion, is a general approximation.

Hello Dear, yes All these papers as you maintained useful but I couldn't get the method to simulate, these papers explain the wicked heat pipe with physical way I need to transfer this to Fluent there r multiphase choice inside Fluent for instant VOF, mixture, and Eulerian

amir_4883 June 7, 2011 14:39

sfx or cfx
 
i remember a person said that must be model with cfx or sfx (sorry i forghat actualy name) your wright in fluent has big problem for model the boiling the droplet to fluid (water)to vapor
my frind i dont have any model file ,i have a paper and book about heat pipe
do you have any program in matlab or anuther softwer for select a heat pipe?
similar this http://www.supersonicengineer.com/ :confused:

skullCFD June 7, 2011 20:29

One way to model is to use UDFs and write correlations for boiling and condensation to predict the quality. Using that information (quality, Tsat,...), the adiabatic section can be reasonably modeled using VOF. It worked for me in COMSOL as the UDFs there can be written in MATLAB. I never worked with UDFs in Fluent.

Heat Pipe June 8, 2011 00:23

Quote:

Originally Posted by amir_4883 (Post 310908)
i remember a person said that must be model with cfx or sfx (sorry i forghat actualy name) your wright in fluent has big problem for model the boiling the droplet to fluid (water)to vapor
my frind i dont have any model file ,i have a paper and book about heat pipe
do you have any program in matlab or anuther softwer for select a heat pipe?
similar this http://www.supersonicengineer.com/ :confused:

I think u meant fix.c ,,,, dear if if u have tutorial pls send me okay thanks

Heat Pipe June 8, 2011 00:28

Quote:

Originally Posted by skullCFD (Post 310950)
One way to model is to use UDFs and write correlations for boiling and condensation to predict the quality. Using that information (quality, Tsat,...), the adiabatic section can be reasonably modeled using VOF. It worked for me in COMSOL as the UDFs there can be written in MATLAB. I never worked with UDFs in Fluent.

yes dear now I reached to UDFs with fix.c but I need now more and more tutorials and manuals to achieve this by myself .... thanks

amir_4883 June 8, 2011 13:27

Quote:

Originally Posted by Heat Pipe (Post 310965)
yes dear now I reached to UDFs with fix.c but I need now more and more tutorials and manuals to achieve this by myself .... thanks


no cfx is new version of fluent -ansys 12
please search in google about it

amir_4883 June 8, 2011 15:22

http://www.cfd-online.com/Forums/cfx...imulation.html

Heat Pipe June 8, 2011 23:36

Quote:

Originally Posted by amir_4883 (Post 311093)
no cfx is new version of fluent -ansys 12
please search in google about it

Dear this software available but nothing new upon my issue .
manual and tutorials .

Energy June 9, 2011 04:21

Hello to everyone.

I would want to know whether its possible to use the evaporation-condensation mass transfer equation to simulate the evaporation process of water to vapor and thus avoid writing a UDF for the same.

I've been simulating the flow but it seems its just natural mixing of water into air (temperature effects of boiling are not visible) even after setting the wall and flow temperatures above saturation. Any help would be highly appreciated.

Many thanks in advance.

haghshenasfard June 24, 2011 13:22

Quote:

Originally Posted by amir_4883 (Post 310735)
Hi if you find it ,please sent me ,i similar you try to solve heat pipe problems ,
i have a lotof file aboute the heat pipe,if you need i can sed for you please send for me your email

Dear Amir
Could your please send me your file and UDFs for me?
Thanks for your kind attention
Masoud734@yahoo.com

DanielLai November 5, 2011 12:22

simulation of heat pipe (evaporation part)
 
Hi everyone, i am currently doing my undergrad and i get this topic (heat pipe) for my final year project...... Just wanna ask whether cfx or fluent is easier to use to model the boiling part of the working fluid in it. Any suggestion??

for the heating part, do i need to draw a heating medium to contact to the pipe?? or juz put the boundary condition of the heat pipe wall as heat flux in to serve as a heating source??

type of working fluid: water
type of HP material: copper
and there is very thin porous domain in the heat pipe to simplify things....

i'm running out of time, hope anyone in this forum can give some suggestion and guidance.... thanks in advance...

militopstar March 13, 2013 05:13

help
 
I have same problem
please send me your files (tutorials & udf) to militopstar@gmail.com

mecman July 23, 2013 18:18

Heat Pipe
 
Hi everyone
i want simulate Heat pipe,with Fluent,But i dont Know haw simulate boiling working fluid in heat pipe?any body solve this problem or do this work?
plz help me....

ali_rmh August 17, 2013 08:08

I neeed to model a heat pipe in comsol
 
Quote:

Originally Posted by skullCFD (Post 310950)
One way to model is to use UDFs and write correlations for boiling and condensation to predict the quality. Using that information (quality, Tsat,...), the adiabatic section can be reasonably modeled using VOF. It worked for me in COMSOL as the UDFs there can be written in MATLAB. I never worked with UDFs in Fluent.

Hi
I really need to do this (modelling a heat pipe) as a part of my final project :confused:. I prefer to creat a model in Comsol. I would be grateful if you could help me.

Regards
Ali

Muhammed_iraq September 21, 2014 20:09

heat pipe
 
Quote:

Originally Posted by militopstar (Post 413598)
I have same problem
please send me your files (tutorials & udf) to militopstar@gmail.com

Please militopstar If you get the tutorial & UDF send it to muham7676@gmail.com
Many Thanks


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