| Author | Message | ||
     Augusto (cdfx) New member Username: cdfx Post Number: 1 Registered: 04-2007 |
Hello for all! I want plot a vector field in 3D like this : plots vector(-dy(u), dx(u), d(z)) points = 70 export format "(#x,#y,#z)=(#1,#2,#3)" file "VECTORFIELD.TXT" as "Vector Fields" norm Is possible to make something similar? | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 808 Registered: 06-2003 |
Did you try it? Did it work? | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 809 Registered: 06-2003 |
A vector plot is always in a 2D plane (as are contours as well). It therefore requires two arguments. You should decide what plane you want to plot in, and what the components of the vectors displayed in that plane should be. If you want an isometric display, with all the vectors in their proper 3D position, it would either create an unintelligible mass, or require a stereo display. Neither of these is currently supported. You should export the data in one of our standard forms and use an external visualization system such as VisIt to create the graphics. If you merely want to export the three values over the entire mesh, you should use a TABLE with format string as you have shown. At present, there are no facilities to export a TABLE on a cutplane. | ||
| Augusto (cdfx) New member Username: cdfx Post Number: 2 Registered: 04-2007 |
Hi! Great, the table is all I need because I try a external viewer. Have some examples how a make this with TABLE? I try a little experiment like a cube inside a cilinder or a big cube with a fluid in one direction. The similar experiment in 2D of them is : TITLE 'Quad in Center' COORDINATES cartesian2 VARIABLES u SELECT { method controls } ngrid = 1.0 / 70.0 DEFINITIONS { parameter definitions } min_domain = 0.0 max_domain = 1.0 min_cube = 0.2 max_cube = 0.8 ! INITIAL VALUES EQUATIONS div(grad(u)) = 0 ! CONSTRAINTS { Integral constraints } BOUNDARIES REGION 1 START(min_domain, min_domain) NATURAL(u) = 1.0 LINE TO (max_domain, min_domain) NATURAL(u) = 0.0 LINE TO (max_domain, max_domain) NATURAL(u) = -1.0 LINE TO (min_domain, max_domain) NATURAL(u) = 0.0 LINE TO CLOSE REGION 2 START(0.2, 0.2) VALUE(u) = 0 LINE TO (max_cube, min_cube) LINE TO (max_cube, max_cube) LINE TO (min_cube, max_cube) LINE TO CLOSE monitors contour(u) plots vector(-dy(u), dx(u)) points = 70 export format "(#x,#y)=(#1,#2)" file "FIELDVECTOR.TXT" as "Field Vector" norm end Thanks! |