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Hello,<br>
<br>
I am new to Gmsh (running gmsh-2.4.2-Windows on a Windows XP system). I
use it as a post-processor to my own heat transfer code (simulation of
a novel solar steam generator), having also a dedicated home-made mesh
generator. In order to view the results with Gmsh, my heat transfer
code writes two ASCII files in Gmsh format at the end of the run. The
first contains the mesh (nodes and both 1D and 2D elements in 3D
space), and the second (merged file) - the nodal and element results.
The results comprise of various quantities:<br>
<ul>
<li>For the 1D fluid elements, the nodal values of fluid temperature,
pressure, steam quality and other fields.</li>
<li>For part of the 2D solid elements, nodal values are the solid
temperature, and element values of conductive fluxes, heat transfer
coefficients and other fields.</li>
<li>For another part of the 2D solid elements, element values are the
incident and net radiative fluxes, average temperature and other fields.</li>
</ul>
The above is mainly intended as a background to the following questions:<br>
<ul>
<li>Is it possible in Gmsh to display results along line of nodes and
elements as x-y graphs (e.g., the solid and fluid nodes and elements
temperature fields along an axial line)? At present I do it manually,
by importing parts of the output into Excel, which is rather
cumbersome. <u><i>The answer to this question is therefore the most
urgent.</i></u><br>
</li>
<li>The geometry of the steam generator we develop is rather
inconvenient to display, since it comprises of several concentric
cylinders having narrow gaps between each other, and also having bases.
In order to display the results, it would be convenient if parts of the
model can be unselected, so that only desirable parts temperatures
contours, say, are displayed. The way I do it now is by defining many
views (around 100), each devoted to a certain group of the nodes or
element and a certain field values. Is there a more elegant and simpler
way to do it? Are the "Physical Names" properties useful for this?
There is very limited documentation of their use in the post-processing
part of Gmsh (provided I do <i><b>not</b></i> use Gmsh geometry and
mesh processors).</li>
<li>For the former issue, it would be beneficial for my geometry if
results could be displayed in a cylindrical coordinate system. Is it
possible? At present I generate an alternative nodes and element file,
where the nodal coordinates are in r-<font face="Symbol">q</font>-z
rather than x-y-z (BTW, I have noticed that the elements cannot be
input on a separate file. Why?), but find it quite inconvenient and
wasteful.</li>
<li>Is there a way to scale differently the various coordinates? It
would be convenient for slender geometries in general, e.g, a high
length-to-diameter-ratio cylinder.<br>
</li>
<li>A tiny-but-irritating problem - whenever I start Gmsh GUI and
wish to open or merge files, it starts at a certain folder where Gmsh
executable resides, rather that the folder I start from (where the post-
files and a link to the Gmsh executable reside). How do I customize it
to start browsing for these files from the current (or other) folder?</li>
</ul>
<div align="center">Thank you, and chapeaux for the good work you are
doing,<br>
Rami<br>
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<div class="moz-signature">-- <br>
<font face="Courier New, Courier">_______________________________________________________________<br>
Rami Ben-Zvi<br>
Solar Research Facilities Unit Tel. +972-8-9343397<br>
Weizmann Institute of Science Fax +972-8-9344117<br>
Rehovot 76100, ISRAEL Mobile +972-54-6279767<br>
e-mail: <a class="moz-txt-link-abbreviated" href="mailto:rami.ben-zvi@weizmann.ac.il">rami.ben-zvi@weizmann.ac.il</a> Home +972-8-9349223<br>
_______________________________________________________________<br>
<br>
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