CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

how to analysis double pipe heat exchanger in cfx

Register Blogs Community New Posts Updated Threads Search

Like Tree3Likes
  • 1 Post By gullapallivijay
  • 1 Post By ghorrocks
  • 1 Post By gullapallivijay

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 12, 2011, 15:25
Post how to analysis double pipe heat exchanger in cfx
  #1
New Member
 
Ram krishna shah
Join Date: May 2011
Location: india
Posts: 4
Rep Power: 15
rammax8 is on a distinguished road
Send a message via Yahoo to rammax8
hii friends,
i'm ram krishna.i have taken final year project to simulate a double pipe heat exchanger but i don't know how to do it.can some one tell me step by step procedure to simulate a double pipe heat exchanger in ansys cfx.
i want to know everything from mess generation to defining inlet, outlet, how to set fluid properties and how to give domain interface. i have to finish my project by 30 may so some one please help me. i will be very grateful to you.
thank you very much
rammax8 is offline   Reply With Quote

Old   May 13, 2011, 03:34
Default
  #2
Senior Member
 
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22
Lance is on a distinguished road
No one is going to write a step-by-step tutorial for you, especially if you have no prior knowledge about CFX. I suggest that you do a lot of tutorials to familiarize yourself with the program. Have a look at tutorial 16 which deals with heat transfer from a heating coil.
Lance is offline   Reply With Quote

Old   May 13, 2011, 06:31
Default is their any book available which has step by step procedure to work on heat exchange
  #3
New Member
 
Ram krishna shah
Join Date: May 2011
Location: india
Posts: 4
Rep Power: 15
rammax8 is on a distinguished road
Send a message via Yahoo to rammax8
Quote:
Originally Posted by Lance View Post
No one is going to write a step-by-step tutorial for you, especially if you have no prior knowledge about CFX. I suggest that you do a lot of tutorials to familiarize yourself with the program. Have a look at tutorial 16 which deals with heat transfer from a heating coil.
hii friend,
thank you for your concern. is their any book available from where i can learn the procedure of analyzing heat exchangers in cfx or fluent.
rammax8 is offline   Reply With Quote

Old   May 13, 2011, 06:51
Default
  #4
Senior Member
 
Lance
Join Date: Mar 2009
Posts: 669
Rep Power: 22
Lance is on a distinguished road
I haven't seen a dedicated CFX book on heat exchangers, that's why I said that you should look into tutorial 16. The manual will also be useful.
Lance is offline   Reply With Quote

Old   May 16, 2011, 07:12
Default
  #5
New Member
 
Vijaya Sekhar Gullapalli
Join Date: May 2011
Location: Sweden
Posts: 6
Rep Power: 15
gullapallivijay is on a distinguished road
You might need to perform conjugate heat transfer for double pipe heat exchanger. Moreover, proper near wall resolution is necessary. Meshing for the solid domain can be tricky due to large aspect ratio and you might need to have a number of cell layers (something like 4-5) in pipe domain. k-w SST model is recommended when you have separated flows etc.
davidrlc89 likes this.
gullapallivijay is offline   Reply With Quote

Old   May 16, 2011, 19:55
Default
  #6
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,850
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
If the solid wall is thin you can use the new capability (V13 I think) to put a thin interface between two fluid regions. This way you do not mesh the thin solid layer, but replace it with a representative thermal resistance. This may simplify things for you.
amin_gls likes this.
ghorrocks is offline   Reply With Quote

Old   May 17, 2011, 04:39
Default
  #7
New Member
 
Vijaya Sekhar Gullapalli
Join Date: May 2011
Location: Sweden
Posts: 6
Rep Power: 15
gullapallivijay is on a distinguished road
Agree with ghorrocks. Thin interface is possible. But sometimes, pipe features enhance or deter local heat transfer and temperature difference. In those cases CHT is interesting for determining local distribution of wall temperatures and heat flux for pipe domain and wall heat transfer coefficients etc for fluid domains
amin_gls likes this.
gullapallivijay is offline   Reply With Quote

Old   May 17, 2011, 20:07
Default
  #8
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,850
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
Obviously if reducing the solid down to a simple thermal resistance is not appropriate then the thin surface approach is not appropriate. Also keep in mind I do not think the thin surface takes into account the thermal mass of the solid (I think). So if you are interested in transient behaviour you will also have to determine if the solid time scale is fast enough to be ignored.
ghorrocks is offline   Reply With Quote

Old   May 24, 2011, 11:44
Default
  #9
New Member
 
Ram krishna shah
Join Date: May 2011
Location: india
Posts: 4
Rep Power: 15
rammax8 is on a distinguished road
Send a message via Yahoo to rammax8
Quote:
Originally Posted by gullapallivijay View Post
Agree with ghorrocks. Thin interface is possible. But sometimes, pipe features enhance or deter local heat transfer and temperature difference. In those cases CHT is interesting for determining local distribution of wall temperatures and heat flux for pipe domain and wall heat transfer coefficients etc for fluid domains
hii vijay..thanks for your replies...but i really need help.i can't do it on my own i tried it..my last date for submission of project is 15 june.can u let me any other way to do.like step by step procedure from modelling to analyzing in any cfd software.
thanking you
regards,
ram krishna
rammax8 is offline   Reply With Quote

Old   May 24, 2011, 20:13
Default
  #10
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,850
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
I do not have time to write step by step procedures.

If you tell us what does not seem to be working we will try to help.
ghorrocks is offline   Reply With Quote

Old   March 29, 2013, 22:15
Default
  #11
New Member
 
David Lopez
Join Date: Dec 2012
Location: Venezuela
Posts: 9
Rep Power: 13
davidrlc89 is on a distinguished road
this is a quick way to simulate the heat transfer through the solid, and if the version 13.0.
The only problem with doing this is that you will do the transfer only in one dimension.
But it's good to start your simulation aporximacion.
regards
davidrlc89 is offline   Reply With Quote

Old   February 14, 2014, 15:49
Default interface error
  #12
New Member
 
hardik thakkar
Join Date: Feb 2014
Posts: 2
Rep Power: 0
hardiksam is on a distinguished road
in post processing, i m getting error related to interface...
so what parameters should i modify in order to get simulation result.
hardiksam is offline   Reply With Quote

Old   February 14, 2014, 17:10
Default
  #13
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,850
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
Please start a new thread for a new question. And when you do please include enough information to make it a worthwhile question - see http://www.cfd-online.com/Wiki/Ansys...ible_answer.3F
ghorrocks is offline   Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Heat sink analysis Scott Hansen CFX 8 May 6, 2015 11:32
UDF for Heat Exchanger model francois louw FLUENT 2 July 16, 2010 03:21
Heat Exchanger Simulation tightaznbreaka FLUENT 0 March 18, 2010 16:45
CFX doesn't continue calculation... mactech001 CFX 6 November 15, 2009 22:25
Terrible Mistake In Fluid Dynamics History Abhi Main CFD Forum 12 July 8, 2002 10:11


All times are GMT -4. The time now is 12:29.