CFD Online Logo CFD Online URL
Home > Forums > ANSYS Meshing & Geometry

[ICEM] Procedure : how to mesh correctly two semicircles in an air flow ?

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

LinkBack Thread Tools Display Modes
Old   March 9, 2011, 15:12
Question Procedure : how to mesh correctly two semicircles in an air flow ?
New Member
Join Date: Feb 2011
Location: Nancy (FRA)
Posts: 6
Rep Power: 8
eeesprit is on a distinguished road
Good evening everyone,

I have - i think - a simple question for you, skilled users of Icem CFD !

Few weeks ago, i tried (unsuccessfully) to mesh a Venturi-tube inside a sphere... Actually, i generated a good-looking mesh, but unfortunately and because of errors it was impossible to read it with Fluent.

This errors certainly result because of my poor knowledge of this software, there were some things that i was doing wrong.

So now, i would like to begin with the beginning and i'm asking you a favor :
how to mesh this (PB1.png) ?
what is the procedure to do this and make it works on Fluent ?

I tried many times, but i'm sure i didn't use the good "procedure" because there are always problems with boundary conditions (on Fluent) even if i setted it correctly on Icem.

My procedure :

1. I draw a point (using coordinates) in each corner on the domain, and then also 3 points for each semicircle.

2. I draw curves between this points (AB, BI, IJ, JA + CE, FH and curves using three points to draw the circles CDE, FGH) + the blue points to be able to set 3 surfaces of fluid (named, for example "AIR") including not the semicircles of course (you can see these points on PB3.png)
But i think that the "blue points" are useless and make the problem more complicated...

Is it possible to define the surface of fluid without these blue points ? (maybe using the tools "Surface > Segment/Trim Surfaces" or "Surfaces > Standard Shapes > Drill a Hole" ? But i don"t know how to use these tools...)

I hope i was clear in my explanations, and i hope that some of you would be able to help me

Thanks !


Attached Images
File Type: png PB3.png (32.9 KB, 27 views)
File Type: png PB1.png (27.1 KB, 19 views)
eeesprit is offline   Reply With Quote

Old   March 11, 2011, 05:46
New Member
Join Date: Feb 2011
Location: Nancy (FRA)
Posts: 6
Rep Power: 8
eeesprit is on a distinguished road
No one can help a newbie like me ??
eeesprit is offline   Reply With Quote

Old   April 10, 2011, 15:14
Default Yes, the blue points are not necessary...
Retired from CFD Online
PSYMN's Avatar
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,665
Blog Entries: 1
Rep Power: 39
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
But I am not really sure what the problem is... It should be fine either way...

You have not given us any info about what type of mesh you generated or what sort of error messages you got. It is tough to help without any real info about what isn't working for you.
Please help guide development at ANSYS by filling in these surveys

Public ANSYS ICEM CFD Users Survey

This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)...

CFD Online Users Survey
PSYMN is offline   Reply With Quote


procedure mesh semicircle

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
Air flow on a pipe gulbenkian FLUENT 1 June 8, 2010 07:31
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 09:38
air flow through porous pipe faiz rauf FLUENT 3 August 11, 2004 15:08
Increasing air flow using fans jim sanders FLUENT 0 January 10, 2002 10:24
Hot rod in transverse air flow Anders Larsson Main CFD Forum 3 April 19, 1999 09:28

All times are GMT -4. The time now is 02:45.