[harsha_kulkarni]

Hello friends
I want to mesh an steam jet ejector but it produces following error

--> FOAM FATAL ERROR:
There are no cells in the mesh!
The reasons for this can be fwofold:
1. Inadequate mesh resolution.
2. You maxCellSize is a multiplier of the domain length. This can be reolved by reducing the maxCellSize by a fraction.i.e. 2.49999 instead of 2.5.

[einstein_zee]

Originally Posted by harsha_kulkarni

Hello friends
I want to mesh an steam jet ejector but it produces following error

--> FOAM FATAL ERROR:
There are no cells in the mesh!
The reasons for this can be fwofold:
1. Inadequate mesh resolution.
2. You maxCellSize is a multiplier of the domain length. This can be reolved by reducing the maxCellSize by a fraction.i.e. 2.49999 instead of 2.5.

Hi there,

I just looked at your .stl file and also the settings of your meshDict file. You just need to set the sizes accordingly! from the .stl file your dimensions are of the order millimeter and you are configuring cfMesh with 10 meters! for the maximum cell size and 1 meter the min cell size!

Hope this helps...

[harsha_kulkarni]

Originally Posted by einstein_zee

Hi there,

I just looked at your .stl file and also the settings of your meshDict file. You just need to set the sizes accordingly! from the .stl file your dimensions are of the order millimeter and you are configuring cfMesh with 10 meters! for the maximum cell size and 1 meter the min cell size!

Hope this helps...

Do I need to scale the mesh using
scalemesh 0.001

[einstein_zee]

Originally Posted by harsha_kulkarni

Do I need to scale the mesh using
scalemesh 0.001

You can do two things : 1- scale your mesh to meters (multiply everything by 1000) in order to be able to use your current settings in cfMesh. But bear in mind that after meshing again you need to revert it back to millimeters.

2- just change the value of maxCellSize instead of 10 to 0.005 or sth else which makes sense concerning the dimensions of your geometry. Also you need to change minCellSize from 1 to something more meaningful (for exp. 0.001).

I do recommend the second way because it would be easier to setup everything. However, the first one gives you the ability to work with big numbers so that it reduces the probability of mistakes that you might do.