[-mAx-]

Originally Posted by mariam.sara

vertex create coordinates -30 0 0
vertex create coordinates -30 -10 0
vertex create coordinates -40 -10 0
vertex create coordinates -32.5 -5 0
edge create threepoints "vertex.8" "vertex.11" "vertex.9" arc
edge create straight "vertex.5" "vertex.8"
edge create straight "vertex.10" "vertex.5"
edge create straight "vertex.10" "vertex.9"
face create wireframe "edge.8" "edge.9" "edge.6" "edge.7" real
/ERROR occurred in the next command!
volume create revolve "face.7" dangle 360 vector 0 0 1 origin 0 0 0

your rotation's axis is wrong

[mariam.sara]

I tried other axis it plot a volume but it incorrect? may u fix me this problem i complete the plot just this small part remain and i already sent the jou file.

[-mAx-]

post picture please

[mariam.sara]

Hi I post three pictures first one for the face i plotted before revolving, the second after i revolve it around y-axis and the third when i revolve the face around x-axis? as you see the volumes in both pictures seems incorrect? when i tried revolve the face around the z-axis it give me error : ACIS error 78074 the sweep surface is in-self intersecting surface? so Please help me to fix it?

mariam

[-mAx-]

picture 2 gives you the answer
...
you have to move your cross section such as its rotation axis matches the y-vector of your coordinate system (or you can create another coordinate system).
But as I see your pictures, the 2 blue points which are supposed to describe the revolution axis doesn't seem to be colinear

[mariam.sara]

Did you mean by moving the cross section is making the y-axis coordinates at the middle of the plot? can you send me picture about this?
About the two blue points it looks located at the same line? why it not colinear?

[-mAx-]

Originally Posted by mariam.sara

Did you mean by moving the cross section is making the y-axis coordinates at the middle of the plot?About the two blue points it looks located at the same line? why it not colinear?

yes move your cross section such as its axis lies on y-axis
-"colinear" is wrong explained, sorry. I wanted to say that the line should be parallel to rotation-axis AND the revolution axis shouldn't cross the section.
In my picture the red surface is "wrong"
Untitled.png

[mariam.sara]

hey max i plot the geometry and revolve the surface successfully then i unite the volumes into one volume but i face an error with mesh please see picture. There error mentioned in it.

[-mAx-]

your central volume is wrong built: you can see it with its mesh.

[mariam.sara]

How i can fixed it? what i can do?

[-mAx-]

Explain how you built it

[mariam.sara]

I create a surface then revolve it as seen in picts 1,2,3 as you told me? then i reflect volume 1 to have the third volume after that i unite the three volumes then i mesh the final volume with cooper?

[-mAx-]

ok once all volumes are created, unite them, because you will have skewness problem at "interfaces" between curved volumes and your volume.2
Now you have only one volume, and you can mesh it

[mariam.sara]

I unite all of it and i predict one volume but it told me the error that i mentioned u at my previous post? what i can do to overcome the skewness problem at interfaces?

[-mAx-]

ah yes it failed because you want cooper.
But if you try tetra, it should be successful.
If you want cooper, you need some works.
But first be sur that your volume is ok

[mariam.sara]

I will see if it work with tetra? but with tetra is it effect the accuracy of results?

[ghost82]

Maybe..with tetra use green gauss node based and second order upwind schemes to have more accurate results.

Daniele