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

[ICEM] Basic meshing doubt

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 23, 2010, 13:15
Question Basic meshing doubt
  #1
New Member
 
Vishnu Prasad
Join Date: Sep 2010
Location: Goa
Posts: 19
Rep Power: 5
vishnukmd7 is on a distinguished road
I'm new to ICEM. I was trying to do a simple 2-d meshing to do a flow sim over a square block just to get accustomed to the meshing process.

I followed the steps given in the 2-d car meshing problem given in tutorials and got a mesh.

Now the problem arises when i try to improt it into Fluent.

I get the mesh read and everything( exported as nastran file and imported in fluent ).. But only 1 zone: interior + exterior ( the outer rectangular domain that I specified enclosing the square ) and the square itself.

No conditions / edges available for inlets and outlets.

Though I can use grid -> split to get this , I want to do this name / zone assigning in ICEM itself.


I did what was given in one of the other posts regarding setting solver and boundary in output tab , but no result.. clicked the rubic cube after setting solver to fluentv_6 and set boundary condtions.tried to import the case to fluent it says access violation.

Here again , I'm confused..to what am i supposed to give boundary conditions??? the geometry I created or part->create part -> different parts with each corresponding to a Boundary and then BC???

I tried both and still no results


So , Can someone tell me what exactly I'm doing wrong..

And plz tell me the step by step method...right from creating geometry to blocking to meshing .....etc.... exactly what is to be done in each step..


And kindly do not refer to tutorials...I have been struggling with tuts for almost a month now
vishnukmd7 is offline   Reply With Quote

Old   September 23, 2010, 16:31
Default Almost step by step...
  #2
Senior Member
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,650
Blog Entries: 1
Rep Power: 34
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
Lets look at the 2D car example...

All around the surface, you have curves... These are your boundaries.

Before generating your final mesh, you need to name these boundaries.

Right click on "Parts" in the model tree and create new.

Type in a new Part name. Lets start with INLET. THen select the curves that represent the inlet on the left side of the box.

Similarly for outlet, floor, ceiling and the car its self. You could even get fancy and name the wheels, windshield, etc.

The 2D surface its self should be in a part called "FLUID" or something like that. The 2D blocks should also be in this Fluid Part.

The next time you compute the premesh, it will put the line elements in the same part as the curves that the edges lay on (The edges must be associated to the curves or no line elements will be generated and you will end up with a null pointer error.)

Then go to output tab, set the solver to fluent and proceed from there. You can setup the boundary conditions as Inlet, Outlet, etc. Or you can just open the boco file, set nothing, apply and close. Then setup which boundary has what condition in Fluent.
PSYMN is offline   Reply With Quote

Old   September 24, 2010, 01:36
Default
  #3
New Member
 
Vishnu Prasad
Join Date: Sep 2010
Location: Goa
Posts: 19
Rep Power: 5
vishnukmd7 is on a distinguished road
Thanks a lot....I'm starting off now
vishnukmd7 is offline   Reply With Quote

Reply

Tags
beginner, icem, meshing

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
Question on Basic Meshing Rule Huygen Main CFD Forum 0 January 15, 2009 12:20
Fluent Basic Doubt Fluent learner FLUENT 16 May 30, 2008 04:09
doubt on meshing joe FLUENT 2 September 12, 2005 13:17
doubt on meshing a cylinder FELIX JOE S FLUENT 13 July 27, 2005 08:06
ProAm meshing...Doubt Antony CD-adapco 5 July 26, 2004 05:31


All times are GMT -4. The time now is 01:40.