|
[Sponsors] |
CFD-Post: streamline movement from stat. to rot. part |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
April 17, 2015, 06:30 |
CFD-Post: streamline movement from stat. to rot. part
|
#1 |
New Member
Join Date: Jan 2015
Posts: 19
Rep Power: 11 |
Hey everyone,
I am trying to simulate the flow in a centrifugal pump. Doing some test runs I recognized an abrupt cut in the "movement" of the streamlines between the rotating parts and the stationair parts like there is a missing interaction between the moving and rotating parts. The pictures attached should make it clear. Do I have to work it out in CFD Post or before in CFX Pre? Thank you all very much for your time... again! |
|
April 17, 2015, 06:31 |
|
#2 |
New Member
Join Date: Jan 2015
Posts: 19
Rep Power: 11 |
The picture of the streamlines
|
|
April 17, 2015, 08:21 |
|
#3 |
Senior Member
Bruno
Join Date: Mar 2009
Location: Brazil
Posts: 277
Rep Power: 21 |
You're getting the correct behavior.
The abrupt change in the streamlines is due to the fact that CFX (and most CFD software, in fact) solves the momentum equations on rotating domains using the rotating reference frame. The result is that the velocity vector inside the rotating domain does not have the component in its circumferential component. If you want to plot the velocity field on the stationary reference frame, use Velocity in Stn Frame. That's all in the documentation. Cheers |
|
April 17, 2015, 09:33 |
|
#4 |
New Member
Join Date: Jan 2015
Posts: 19
Rep Power: 11 |
Thank you very much for the explanation Bruno! I didnt thourd of the missing circumferential component in the stationary parts! ... I am going to search/ read now more about adding cyldrical coordinates to not symmetric parts and using turbo.
I apologie in advance for might having to ask some questions about it later Cheers |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
specific heat capacity at constant pressure in CFD Post | newbie384 | CFX | 5 | November 27, 2015 21:25 |
Plotting Radial Velocity and Tangential Velocity in CFD Post | ashtonJ | CFX | 5 | July 13, 2015 02:49 |
Plotting the Viscosity Contour in CFD Post | ashtonJ | FLUENT | 3 | June 2, 2015 12:06 |
CFD Post Streamlines better representation? | Dr. Flow Squad | CFX | 2 | January 20, 2014 13:48 |
Chart of velocity on a streamline cfd post | Felipe Mendes | CFX | 2 | June 12, 2012 07:49 |