CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > SU2

Rotating wall velocity boundary condition for axisymmetric flow problem

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 28, 2013, 02:00
Default Rotating wall velocity boundary condition for axisymmetric flow problem
  #1
Member
 
Anant Diwakar
Join Date: Jan 2013
Posts: 68
Rep Power: 13
diwakaranant is on a distinguished road
Hello

I am trying to solve flow between two rotating cylinders having a rotating
circular ring in the annulus. The cylinder walls and the ring are rotating
with different angular velocities. I have taken a wedge shape domain
with front and back faces as "periodic walls". This type of flow has
non-zero swirl, radial and axial velocities, which do not vary with azimuthal angle.

The walls are kept as some temperatures, say 300 K.

Hence I wanted to know whether we can apply rotating wall velocity
conditions at different walls, in non-rotating frame of reference, in SU2 ?

Also, I wanted to know whether we can have single cell in the azimuthal
direction ? (between periodic front and back walls)

The schematic of the problem is attached with the post.

Thanks
Anant
Attached Files
File Type: pdf schematic.pdf (10.1 KB, 79 views)
diwakaranant is offline   Reply With Quote

Old   March 24, 2013, 00:45
Default
  #2
Super Moderator
 
Francisco Palacios
Join Date: Jan 2013
Location: Long Beach, CA
Posts: 404
Rep Power: 15
fpalacios is on a distinguished road
Quote:
Originally Posted by diwakaranant View Post
Hello

I am trying to solve flow between two rotating cylinders having a rotating
circular ring in the annulus. The cylinder walls and the ring are rotating
with different angular velocities. I have taken a wedge shape domain
with front and back faces as "periodic walls". This type of flow has
non-zero swirl, radial and axial velocities, which do not vary with azimuthal angle.

The walls are kept as some temperatures, say 300 K.

Hence I wanted to know whether we can apply rotating wall velocity
conditions at different walls, in non-rotating frame of reference, in SU2 ?

Also, I wanted to know whether we can have single cell in the azimuthal
direction ? (between periodic front and back walls)

The schematic of the problem is attached with the post.

Thanks
Anant
Dear Anant,
Thanks you for your interest in SU2. The current implementation v2.0.2 requires a hub, and at least 3 cells in the azimuthal direction.

It is very easy to impose a different velocity to each surface with a small modification of the subroutine
void CNSSolution::BC_NS_Wall(CGeometry *geometry, CSolution **solution_container, CNumerics *solver, CConfig *config, unsigned short val_marker)

or

void CEulerSolution::BC_Euler_Wall(CGeometry *geometry, CSolution **solution_container, CNumerics *solver, CConfig *config, unsigned short val_marker)

for inviscid flows.

both subroutines are in solution_direct_mean.cpp

Best,
Francisco
fpalacios is offline   Reply With Quote

Reply

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
Problem with assigned inlet velocity profile as a boundary condition Ozgur_ FLUENT 5 August 25, 2015 05:58
Boundary condition for compressible flow ( cavity lid problem) pike@91 Main CFD Forum 2 June 2, 2012 18:04
Plot a graph of velocity & boundary condition problem wanie Fluent UDF and Scheme Programming 0 December 11, 2009 11:40
Periodic flow boundary condition problem sudha FLUENT 3 April 28, 2004 09:40
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13


All times are GMT -4. The time now is 13:05.