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

modeling flow around aerodynamic profile with using immersed solid

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 8, 2013, 13:36
Default modeling flow around aerodynamic profile with using immersed solid
  #1
New Member
 
Join Date: Jun 2013
Posts: 3
Rep Power: 4
yutangg is on a distinguished road
Hi everyone!
I try to modeling flow around aerodynamic profile with using immersed solid.
I did simulates with change:
- Momentum Sources (global) ( 7 to 50)
- Boundary Distance (0.7 to 3 mm for my mesh 0.5 mm )
and still nothing, the results (flow field and lift, drag force) are wrong.


How use immersed solid to aerodynamic simulation?

Last edited by yutangg; June 8, 2013 at 17:11.
yutangg is offline   Reply With Quote

Old   June 9, 2013, 03:38
Default
  #2
Senior Member
 
hmasenger's Avatar
 
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 8
hmasenger is on a distinguished road
it is really important to have inflated meshes near wall boundaries.did you use this type of mesh ?
hmasenger is offline   Reply With Quote

Old   June 10, 2013, 15:38
Default
  #3
New Member
 
Join Date: Jun 2013
Posts: 3
Rep Power: 4
yutangg is on a distinguished road
thank you for your answer
yes, i tried out several types of nets but still i can't observe good the boundary layer
yutangg is offline   Reply With Quote

Old   June 10, 2013, 20:49
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,646
Rep Power: 84
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
What Re and/or Ma number is the flow? What y+ are you using?
ghorrocks is offline   Reply With Quote

Old   June 11, 2013, 13:17
Default
  #5
New Member
 
Join Date: Jun 2013
Posts: 3
Rep Power: 4
yutangg is on a distinguished road
it's a laminar flow 800 Re and y+ < 2
yutangg is offline   Reply With Quote

Old   June 11, 2013, 20:54
Default
  #6
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,646
Rep Power: 84
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
y+ has no meaning for laminar flows.

If this is a laminar model then you might be able to get this to work with immersed solids. It is likely to be quite grid sensitive - have you done a mesh sensitivity check?
ghorrocks is offline   Reply With Quote

Reply

Tags
immersed solid

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flow Through an Immersed Solid ! kimiaghalam CFX 4 April 7, 2013 04:56
Compressible flow modeling in Fluent nikhil FLUENT 8 August 9, 2011 14:18
Modeling solid particles within fluid flow steelydan ANSYS 1 July 22, 2011 03:01
Viscoelastic flow modeling in rotorstator system vulda OpenFOAM Running, Solving & CFD 3 July 12, 2008 03:16
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55


All times are GMT -4. The time now is 14:50.