CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

ICEM and CYLINDRICAL CORDINATE SYSTEM

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 23, 2009, 05:09
Default ICEM and CYLINDRICAL CORDINATE SYSTEM
  #1
Member
 
Hamoudi djamel
Join Date: Apr 2009
Posts: 50
Rep Power: 8
hamoudi is on a distinguished road
Hi Everybody,

I have a problem,I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system.

But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in (r,theta,z)
then i have my geometry in (y,z) plane, so for the velocities
the radial velocity
U(r) is in -------- y direction
and U (theta) tangential velocity is in --------x direction
and U(z) is in ------------------------------- z direction

----------------------------------------------------------------
after that i export my Mesh to Star-CD
in boundary condition at the inlet part i change the coordinate system
from cartesian to cylindrical from number 1 to number 2
from ( x,y,z) to (r,theta,z)
then Star-CD consider that
the radial velocity U(r) is --------------------- in x direction
U (theta) is ----------------in y direction
U(z) is ---------------------in z direction

-------------------------------------------------------------------
so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis
I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence
----------------------------------------------------------------------
I am in waiting for your suggestion

Thank you very much for you
hamoudi is offline   Reply With Quote

Old   July 23, 2009, 06:37
Default CFX and Cylindrical Coordinate
  #2
Member
 
Hamoudi djamel
Join Date: Apr 2009
Posts: 50
Rep Power: 8
hamoudi is on a distinguished road
Hi Everybody,

I have a problem,I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system.

But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in (r,theta,z)
then i have my geometry in (y,z) plane, so for the velocities
the radial velocity
U(r) is in -------- y direction
and U (theta) tangential velocity is in --------x direction
and U(z) is in ------------------------------- z direction

----------------------------------------------------------------
after that i export my Mesh to Star-CD
in boundary condition at the inlet part i change the coordinate system
from cartesian to cylindrical from number 1 to number 2
from ( x,y,z) to (r,theta,z)
then Star-CD consider that
the radial velocity U(r) is --------------------- in x direction
U (theta) is ----------------in y direction
U(z) is ---------------------in z direction

-------------------------------------------------------------------
so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis
I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence
----------------------------------------------------------------------
I am in waiting for your suggestion

Thank you very much for you
hamoudi is offline   Reply With Quote

Old   July 23, 2009, 07:48
Default
  #3
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
So won't a simple rotation fix it up?

Glenn
ghorrocks is offline   Reply With Quote

Old   July 23, 2009, 11:41
Default CFX and CYLINDRICAL CORDINATE SYSTEM
  #4
Member
 
Hamoudi djamel
Join Date: Apr 2009
Posts: 50
Rep Power: 8
hamoudi is on a distinguished road
Hi Everybody,



I have a problem, I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system.

But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in (r,theta,z)
then i have my geometry in (y,z) plane, so for the velocities
the radial velocity
U(r) is in -------- y direction
and U (theta) tangential velocity is in --------x direction
and U(z) is in ------------------------------- z direction

----------------------------------------------------------------
after that i export my Mesh to Star-CD
in boundary condition at the inlet part i change the coordinate system
from cartesian to cylindrical from number 1 to number 2
from ( x,y,z) to (r,theta,z)
then Star-CD consider that
the radial velocity U(r) is --------------------- in x direction
U (theta) is ----------------in y direction
U(z) is ---------------------in z direction

-------------------------------------------------------------------
so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis
I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence
----------------------------------------------------------------------
I am in waiting for your suggestion

**
I try to do all rotation of the plane but there is no changement in results
***

Thank you very much for you
hamoudi is offline   Reply With Quote

Old   July 23, 2009, 11:43
Default CFX and Cylindrical Coordinate
  #5
Member
 
Hamoudi djamel
Join Date: Apr 2009
Posts: 50
Rep Power: 8
hamoudi is on a distinguished road
Hi Everybody,



I have a problem, I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system.

But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in (r,theta,z)
then i have my geometry in (y,z) plane, so for the velocities
the radial velocity
U(r) is in -------- y direction
and U (theta) tangential velocity is in --------x direction
and U(z) is in ------------------------------- z direction

----------------------------------------------------------------
after that i export my Mesh to Star-CD
in boundary condition at the inlet part i change the coordinate system
from cartesian to cylindrical from number 1 to number 2
from ( x,y,z) to (r,theta,z)
then Star-CD consider that
the radial velocity U(r) is --------------------- in x direction
U (theta) is ----------------in y direction
U(z) is ---------------------in z direction

-------------------------------------------------------------------
so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis
I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence
----------------------------------------------------------------------
I am in waiting for your suggestion

**
I try to do all rotation of the plane but there is no changement in results
***

Thank you very much for you
hamoudi is offline   Reply With Quote

Reply

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
CFX and cylindrical coordinates VSB CFX 6 September 4, 2014 21:41
Design Modeler to ICEM..... Joe CFX 0 January 24, 2008 04:39
Extrude mesh in ICEM CFD Susan CFX 2 November 5, 2007 18:10


All times are GMT -4. The time now is 02:43.