CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Unstructured/ structured grid

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 27, 2006, 13:53
Default Unstructured/ structured grid
Posts: n/a

Can anyone explain the differences between a structured and an unstructured grid? What are the applications of each and when/ where do we use them?

I'm having trouble meshing my geometry in Gambit and was thinking of using Tgrid to generate the mesh. But I have no idea of how to use it. Can it accept files from CAD programs like Pro/E? My geometry was created in Pro/E.

Thanks, Vidya

  Reply With Quote

Old   June 29, 2006, 18:34
Default Re: Unstructured/ structured grid
Posts: n/a
well, you wonna take any CFD fundamental book in that regards. search it through this website or wikipedia, they have good info in that regards.

in short: structure mesh is structured as the english word and the same applied to the opposite. the structured tends to have 'regilar' mesh which is good for simple geometry. however, if the geo is complex, getting a structured mesh is difficult. to explain it more: take s regular cube or a box. it has a fine difined geo and easily to create mesh or grid on it. but take a circular cylinder,because of it curve surfaces getting a regular mesh that resemble its configuration will be difficult than a cube. so in that case you might consider go for irregular form with say octagonal or some of that nature shape.

for a bl flow, you might consider structure mesh since it'll allow you to resolve well near the wall while unstructure will not be able to achieve good y+ value. I must say that, the USM tends to have more number of elements and that will reqiure high computing power and time.

Gambit should be able to accept proE. check the USER manual for that and also your license if that feature is added. Also, you need to spend time on Gambit and study it features. It comes with various form of meshing SM(hexa:cooper, submap, map, etc) and UNM(tet).

all the best and welcome to it..
  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help! Validity of unstructured grid on S809 airfoil didiean FLUENT 11 April 3, 2011 02:10
Structured to Unstructured grid Sen Main CFD Forum 2 March 2, 2011 11:33
structured and unstructured grid Cathy FLUENT 1 July 27, 2003 19:15
structured & unstructured grid Ben Main CFD Forum 9 February 10, 2003 13:33
Combustion Convergence problems Art Stretton Phoenics 5 April 2, 2002 05:59

All times are GMT -4. The time now is 05:51.