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-   -   [ICEM] problem icem cfd (http://www.cfd-online.com/Forums/ansys-meshing/113306-problem-icem-cfd.html)

tmeysam92 February 17, 2013 12:37

problem icem cfd
 
2 Attachment(s)
Hi all,

i meshed my geometry in ICEM CFD, and it contains a cylindrical part and a nozzle part.(see the picture)

the problem is that, i want to export mesh to fluent, but these two parts have different initial velocity in fluent. so how can i put different velocity for these two parts?
i mean what should i do in ICEM CFD boundary condition?
i have attached prj&blk&tin files.

tanks in advance.

Far February 17, 2013 14:28

Which two parts? Anyhow, you need to define part and there should be blocking for that part (you need to split blocking to that part if you need different BC)

tmeysam92 February 17, 2013 14:48

Quote:

Originally Posted by Far (Post 408319)
Which two parts? Anyhow, you need to define part and there should be blocking for that part (you need to split blocking to that part if you need different BC)

thanks FAR,

you right, there are not two parts, i mean the cylinder and nozzle.

so, you mean i should use create part tool by using "blocking material, create part" for each one???

Far February 17, 2013 14:50

I mean geometry parts. you need to create in, out, wall etc.

tmeysam92 February 17, 2013 15:10

1 Attachment(s)
Quote:

Originally Posted by Far (Post 408322)
I mean geometry parts. you need to create in, out, wall etc.

if you look at below picture you will understand what i mean.

i want to have different initial velocity in fluent for fluid 1 and fluid 2,

now what should i do?? is it right that i should use create body in geometry tab of icem cfd?

Far February 17, 2013 17:00

this can be done easily in Fluent .

tmeysam92 February 18, 2013 00:52

Quote:

Originally Posted by Far (Post 408334)
this can be done easily in Fluent .

could you please explain more?
where in fluent??? is it right that i should use Patch tool in fluent???

thank you FAR.

Far February 18, 2013 13:28

http://imageshack.us/a/img689/3291/differntinitia.png

http://imageshack.us/a/img46/8339/differntinitia2.png

http://imageshack.us/a/img705/6711/differntinitia3.png

http://imageshack.us/a/img7/8995/differntinitia4.png

http://imageshack.us/a/img705/9273/differntinitia5.png

PSYMN February 18, 2013 19:02

This is one of those times when "why?" would be a great question...

You should probably not be setting two velocities.

You should set the inlet velocity and the velocity in the nozzle will be calculated...

If you are just trying to speed things up and initialize with closer to final velocities, then you should be using the new hybrid initialization in Fluent... It basically generates a coarse background grid and then does a rough solve to work out initial velocities through the volume. These initial velocities are applied to the real solution as a great starting point.


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