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ptc-49396791-Visitor
1-Visitor
January 29, 2013
Question

Velocity vector

  • January 29, 2013
  • 5 replies
  • 5082 views

Hello everyone,

I am working in a fluid mechanics thesis(in mathcad) and I confront a problem with the visualisation of velocity field. The function of velocity depends on vaiables r,z (I've already found a set of values of r,z). I would like to inform me if it is possible how to depict the velocity as a vector in the same graph with the r,z.

Thank you!

5 replies

V
24-Ruby IV
ValeryOchkov24-Ruby IV
24-Ruby IV
January 29, 2013

Can you please show some picture or Mathcad-sheet - what do you like to get!

R
RichardJ19-Tanzanite
19-Tanzanite
January 29, 2013

Which version of Mathcad are you using?

A
AlanStevens19-Tanzanite
19-Tanzanite
January 29, 2013

The attached might be of some help (as long as you are using M15)

Also, if you look at http://communities.ptc.com/message/195993#195993 Richard has provided a slicker way of drawing an arrow - though it's in Mathcad Prime format.

Alan

R
RichardJ19-Tanzanite
19-Tanzanite
January 29, 2013

Here's the original, for MC15 and earlier.

P
ptc-49396791-VisitorAuthor
1-Visitor
January 29, 2013

Thank you all. I use the version of mathcad14. I will try your methods and see the results.

R
RichardJ19-Tanzanite
19-Tanzanite
January 29, 2013

Here's another great worksheet from Stuart that you might find useful.

H
HarveyHensley12-Amethyst
12-Amethyst
January 29, 2013

For the lazy person, you can use the 3D vector field plot and just show the r and z vectors along the axes. This gives an approximation because the r and z values are not precisely aligned with the plot, but the trends are shown.

I reversed the r, z and v rows and columns to make r2, z2 and v2. Then, after making the plot and aligning the r2 and z2 vectors alongside the plot, I captured the group in a picture. This allowed me to expand the picture so everything remained in the original proportion.

For development work, this may be okay, but not for publication.

Capture+vector.JPG

P
ptc-49396791-VisitorAuthor
1-Visitor
January 30, 2013

Thanks for your response..I searched about 3d vector field plot but I think that my version doesn't support it.

I'll check once more your method.

W
Werner_E25-Diamond I
25-Diamond I
January 30, 2013

Leni Kat schrieb:

Thanks for your response..I searched about 3d vector field plot but I think that my version doesn't support it.

I'll check once more your method.

You wrote that you are using Mathcad 14, so your version supports vector field plots.

You may insert that graph via "Insert/Graph/Vector Field Plot".

If you have already inserted a "normal" 3D-graph (for instance a surface plot via ctrl-2), you can change the plot type in the 3-D plot Format menu (double clicking the graph) in tab "General".

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