Plotting unstructured grids in FAST ??

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 December 3, 2001, 18:54 Plotting unstructured grids in FAST ?? #1 Radhika Gupta Guest   Posts: n/a 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, 07:40 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, 08:36 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, 08:52 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, 19:24 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