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-   -   Beginner Problem (http://www.cfd-online.com/Forums/flow-3d/81725-beginner-problem.html)

Sly787 November 4, 2010 15:58

Beginner Problem
 
Hi All,
I'm italian and I'm an engineer who works in inkjet world. I'm developing a new piezoelectric printhead for printing on tiles and I need to simulate drop formation.

When I had to simulate pressure history and velocity history I used FLUENT and I model a 2d surface, so with axis-symmetry condition I can obtain a full developed structure.
For drop formation I think Flow-3d is better than FLUENT, so I'm trying to use it, but can I work in the same way?
Can I model a 2D surface for 1/2nozzle and use symmetry to have other 1/2? Or in general is possible to simulate 2D or 1D problem?

Because now I model 2D surface, but when I mesh it software crashes if try to use a 2D mesh. When a 3D mesh all is ok, but I want a 2D problem.

Thank You.

MuxaB November 4, 2010 23:57

yes, you should be able to run 1d and 2d problems and use symmetry in FLOW-3D. There are several examples of such modeling in the Examples directory in the installation.

What is the error message when it crashes?

Sly787 November 5, 2010 03:55

Quote:

Originally Posted by MuxaB (Post 282238)
yes, you should be able to run 1d and 2d problems and use symmetry in FLOW-3D. There are several examples of such modeling in the Examples directory in the installation.

What is the error message when it crashes?

Nothing message.
Simply Win7 crashes and exits from program.

MuxaB November 6, 2010 20:40

Quote:

Originally Posted by Sly787 (Post 282258)
Nothing message.
Simply Win7 crashes and exits from program.

Have you talked to support? At what stage is it crashing, during pre-processing or some way into the simulation?

Sly787 November 7, 2010 05:37

Quote:

Originally Posted by MuxaB (Post 282480)
Have you talked to support? At what stage is it crashing, during pre-processing or some way into the simulation?

It crashes after meshing when I begin to set-up boundary conditions. When I open boundary conditions window after model geometry and mesh.
I can't set any boundary conditions.

MuxaB November 7, 2010 13:03

Quote:

Originally Posted by Sly787 (Post 282499)
It crashes after meshing when I begin to set-up boundary conditions. When I open boundary conditions window after model geometry and mesh.
I can't set any boundary conditions.

Oh, so the GUI crashes as soon as you start setting up the boundary conditions, right? I have not heard of this problem. Have you reported it to support? Can you attach here the prepin file?


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