CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

How to Model Pipe Inside A Pipe

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 6, 2023, 10:00
Default How to Model Pipe Inside A Pipe
  #1
New Member
 
Agung
Join Date: Jun 2023
Posts: 4
Rep Power: 3
limowaagung11 is on a distinguished road
hi i have a design model quite a complex model about a ventilation duct inside a tunnel, I've made the model on CAD and imported it as IGS file in design modeler and have tried to simulate it on Ansys but the problem is the air is not flowing through the duct but otherwise it flow out (it makes no air flow inside the duct). I've imported duct as slice material, add frozen (It makes air didnt flow out from the duct), add material (similar case with add frozen).
limowaagung11 is offline   Reply With Quote

Old   June 7, 2023, 04:09
Default
  #2
New Member
 
Sam
Join Date: Mar 2017
Posts: 3
Rep Power: 9
__sam__ is on a distinguished road
Quote:
Originally Posted by limowaagung11 View Post
It makes air didnt flow out from the duct
First of all, your question is a bit vague, you might want to provide a diagram or explain the problem in more detail. Some questions you might want to ask yourself:

So do you have air volume inside your duct? If the duct is a closed, it will be modelled as a solid obstacle so make sure to check it's open so the mesher can place cells inside.

If you have mesh cells present inside the duct, have you checked how many cells it has been discretised with? If it's not got boundary layer cells and has a small number of large cells, it probably won't get flow through it because it's going to be seen as highly resistant due the domination of viscous forces.

How big is your duct? If it's a very small opening, it wouldn't surprise me that there is very little flow going through it as it may be highly resistant - you may need a fan inside to create a good enough pressure gradient.
__sam__ is offline   Reply With Quote

Reply

Tags
cfd, flow 3d, pipe, ventilation

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Use of k-epsilon and k-omega Models Jade M Main CFD Forum 40 January 27, 2023 07:18
Flux inside a pipe of a fluid with a solute Jose Manuel Olmos OpenFOAM Running, Solving & CFD 0 March 17, 2021 18:05
Inside pipe wall temperature rise time t=? tibor Autodesk Simulation CFD 5 September 22, 2017 17:50
How to model a mechanical valve in a pipe? hoyin FLUENT 0 September 4, 2017 05:05
model of pipes inside pipe carmen FLUENT 0 January 22, 2009 09:27


All times are GMT -4. The time now is 07:09.