# Plotting unstructured grids in FAST ??

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

 December 3, 2001, 19:54 Plotting unstructured grids in FAST ?? #1 Radhika Gupta Guest   Posts: n/a Sponsored Links Hello, Does anybody knows, in format do we need the data to plot an unstructured grid in FAST. Right now I have the number of nodes, with there x y z coordinates and the number of elements (quadrilaterals) with their connectivity. any help asap, will be really appreciated. regards, -Radhika

 December 4, 2001, 08:40 Re: Plotting unstructured grids in FAST ?? #2 Pete Guest   Posts: n/a I believe FAST (at least the last version I used several years ago) can only handle unstructured grids comprised of triangular/tetrahedral elements. If your quadrilateral grid is I-J ordered you can use the structured PLOT3D format, otherwise you would have to subdivide your elements for the sake of plotting or use another, more flexible package.

 December 4, 2001, 09:36 Re: Plotting unstructured grids in FAST ?? #3 Radhika Gupta Guest   Posts: n/a Let's assume that I have triangles aswell of I-J-K order. Now when I try to write in PLOT3D format, the manual specifies some flags for the triangles. I could not understand the significance of the same. So I give all of them a value of 1 or 2. I do not get the same type of grid I am expecting. Some corners are missing or some last elements seems to be joined with middle elements.

 December 4, 2001, 09:52 Re: Plotting unstructured grids in FAST ?? #4 Pete Guest   Posts: n/a Just a guess, but it sounds like with PLOT3D format you may inadvertently be specifying a blanking with the "1" and "2" values you're using, or the I-J ordering isn't quite right. Plotting as a structured grid you shouldn't see any diagonal lines. FAST also has an unstructured format you can look into, check the manual for: Grid file: # nodes, # tri faces, # tetrahedra (x,y,z), i=1,# nodes (triangle connectivities), i=1,# tri faces(tri face boundary conditions), i=1,# tri faces (tetrahedra connectivities), i=1,# tets The Q file is similar to PLOT3D format, except the Q arrays goes from 1 to # nodes. That's about all I remember, it's been a while. Good luck!

 December 9, 2001, 20:24 Re: Plotting unstructured grids in FAST ?? #5 Abhijit Tilak Guest   Posts: n/a Hi Consider using GMV. It can plot any damn thing as long as u give correct connectivity information. GMV is available on majority of platforms. I don't remember the web page addess but u can search thru google. hope this helps. Abhijit

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post thomasduerr OpenFOAM Meshing & Mesh Conversion 20 March 13, 2017 07:07 Shane FLUENT 2 January 23, 2007 21:57 sunny Main CFD Forum 1 October 10, 2004 07:27 Tony Main CFD Forum 2 January 7, 2002 09:31 m.s. darwish Main CFD Forum 0 August 24, 1999 13:44