CFD Online URL
[Sponsors]
Home > Forums > CFX

the pressure coefficient vs angle in CFX??

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 27, 2009, 19:36
Default the pressure coefficient vs angle in CFX??
  #1
New Member
 
Juan Lorenzo
Join Date: Jul 2009
Posts: 19
Rep Power: 7
Jwolf is on a distinguished road
Hello to all,

I have studied, with CFX, the problem of flow past a circular cylinder in a uniform stream and I have plotted in XY graphics the pressure coefficient vs position(m).

The questions are:

1) How can I plot, in CFX, the pressure coefficient vs angle?

2) What is the correct form of the expression the pressure coefficient? this is correct?

Coefficient Pressure = (Pressure - RefPressure)/dynHead

dynHead = 0.5 * areaAve(Density)@Surface Cylinder * areaAve(Velocity)@Surface Cylinder^2

3) The pressure is the one that calculates in the surface of the cylinder?


Thanks a lot
Jwolf is offline   Reply With Quote

Old   December 14, 2012, 08:31
Default
  #2
New Member
 
Join Date: Nov 2012
Posts: 5
Rep Power: 4
turbodede is on a distinguished road
I think it should be correct also:

2*(Pressure -areaAve(Pressure)@R1 Inlet)/(areaAve(Density)@R1 Inlet *areaAve(Velocity)@R1 Inlet ^2)

for the plot I canīt help you because it is so difficult find information above charts. the problem is that he should have as x or y variable an "some way-averaged quantity" and this is useless for your need.

Iīm sorry. If you find this answer please reply on this tread!

good work

David
turbodede 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
How to use ANSYS CFX to get the drag coefficient? victorzcc CFX 7 January 23, 2012 20:50
Import netgen mesh to OpenFOAM hsieh Open Source Meshers: Gmsh, Netgen, CGNS, ... 32 September 13, 2011 06:50
Pressure BC for combustion chamber Giuki FLUENT 1 July 19, 2011 12:35
air bubble is disappear increasing time using vof xujjun CFX 9 June 9, 2009 08:59
Neumann pressure BC and velocity field Antech Main CFD Forum 0 April 25, 2006 03:15


All times are GMT -4. The time now is 20:27.