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

Fluent_PostProcessing_Point surface creation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 7, 2011, 05:09
Default Fluent_PostProcessing_Point surface creation
  #1
New Member
 
Joe
Join Date: Mar 2009
Posts: 26
Rep Power: 8
wateraction is on a distinguished road
Hi, here is my problem,
I want to create a series of points on a certain surface in my model in fluent postprocessing, so that I can see the velocity data on these points. Firstly, I created a point named x1y1, then I wanted to use the surface transform to create the next point named x1y2 which is 200mm offset to the first point in the y-direction. But when I did it, it turned out a failure with a message "error object".
Therefore, I wonder if it is not allowed to create points using "surface transform" in fluent postprocessing, unlike creating surfaces in that way, or is it because my fluent version 6.3.26 is not high enough?
Thank you!
wateraction is offline   Reply With Quote

Old   September 8, 2011, 11:59
Default
  #2
New Member
 
Ronald A. Lau
Join Date: Jul 2009
Location: Chicago
Posts: 29
Rep Power: 8
ronaldalau is on a distinguished road
Send a message via Skype™ to ronaldalau
When I want to make a bunch of point surfaces, I use excel, like this:

surf point-surf pt_1-02 1.269 0.610 22.000
surf point-surf pt_1-04 1.269 1.219 22.000
surf point-surf pt_1-06 1.269 1.829 22.000
surf point-surf pt_1-08 1.269 2.439 22.000
surf point-surf pt_1-10 1.270 3.049 22.000
surf point-surf pt_2-02 3.708 0.610 22.000

Then I select the cells, copy, and paste into the TUI.
Just make sure that the units used in the excel file are the same as the length unit set in fluent.

Cheers.
ronaldalau is offline   Reply With Quote

Old   September 15, 2011, 06:24
Smile Thank you, ronaldalau
  #3
New Member
 
Joe
Join Date: Mar 2009
Posts: 26
Rep Power: 8
wateraction is on a distinguished road
Hi, ronaldalau, thank you very much for sharing your knowledge and valueable experience!
I've used your method and it worked very well.
I should say it's a huge help for me and would save me a lot of time!
I hope I could see your reply earlier so that I could avoid the tough work of typing (x,y,z) value for all 100 points.
However, the method is still pretty for my later on work.
I really appreciated it!
wateraction is offline   Reply With Quote

Old   September 19, 2011, 10:33
Default
  #4
New Member
 
Ronald A. Lau
Join Date: Jul 2009
Location: Chicago
Posts: 29
Rep Power: 8
ronaldalau is on a distinguished road
Send a message via Skype™ to ronaldalau
This works with b.c. entry as well.
Cheers,
R.
ronaldalau is offline   Reply With Quote

Old   September 19, 2011, 14:55
Default plot of cp distibution across a 3D airfoil at any given location
  #5
New Member
 
Join Date: Apr 2011
Posts: 2
Rep Power: 0
Rizou is on a distinguished road
Hi all

Plz can anybody tell me how can I get a plot of Cp distribution across a 3D aifoil at given location in fluent.

thanks in advance
Rizou is offline   Reply With Quote

Old   September 25, 2011, 22:32
Default
  #6
New Member
 
Joe
Join Date: Mar 2009
Posts: 26
Rep Power: 8
wateraction is on a distinguished road
Quote:
Originally Posted by Rizou View Post
Hi all

Plz can anybody tell me how can I get a plot of Cp distribution across a 3D aifoil at given location in fluent.

thanks in advance

Hi, Rizou,
I'm not familiar with the plot function in fluent, but I can tell you how to get the Cp value of given locations.

First you should know the (x,y,z) value of each given location across the airfoil. Then create points for these given locations by the format below in the txt command line in fluent(for example, there are totally 9 points named p1,p2....p9, with each coordinates value as (x1,y1,z1) to (x9,y9,z9)):

surf point-surf p1 x1 y1 z1
surf point-surf p2 x2 y2 z2
.....
surf point-surf p9 x9 y9 z9

the you can write a profile by clicking "file-->write-->profile...", choose these created points on the left frame, choose Cp on the right frame, and select a route to save it.
The profile can be opened by Excel, and these Cp value and points information could be shown and then be processed as you wish.

Good luck!
wateraction is offline   Reply With Quote

Old   September 28, 2011, 13:51
Default
  #7
New Member
 
Join Date: Apr 2011
Posts: 2
Rep Power: 0
Rizou is on a distinguished road
Hi wateraction

Thank you so much for your help, it worked.
I have another question plz; I want to compare my CFD results with experimental data. So Does anybody have an idea where i can find experimental data for cp for NREL phase IV aifoil?

thanks a lot
Rizou is offline   Reply With Quote

Old   October 3, 2011, 05:22
Default
  #8
New Member
 
koteswari
Join Date: Mar 2011
Posts: 14
Rep Power: 6
mdsvjpk is on a distinguished road
i am getting zeros values when i tried to locate the velocities on a certain surface if i deactivate the node value option then i am getting some values but i am sure its not correct can u pls help me how to resolve this problem
thanks in advance
mdsvjpk 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
Error : Self intersecting surface mesh, computing intersections & Error : Impossible velan Open Source Meshers: Gmsh, Netgen, CGNS, ... 1 July 14, 2015 05:54
Problem with Gmsh nishant_hull Open Source Meshers: Gmsh, Netgen, CGNS, ... 18 April 22, 2015 08:43
problem with surface creation in ICEM from multiple curves dialolema ANSYS Meshing & Geometry 2 October 27, 2014 14:14
[ICEM] Problems with coedge curves and surfaces tommymoose ANSYS Meshing & Geometry 0 August 5, 2011 16:02
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19


All times are GMT -4. The time now is 15:18.