CFD Online Discussion Forums

CFD Online Discussion Forums (
-   FLOW-3D (
-   -   InkJet Modeling (

ck5285 May 6, 2009 20:15

InkJet Modeling
HI All
I'm want to do modeling that similar to inkjet and noticed most of the inkjet model example from F3D user website are in cylindrical mesh and not cartesian mesh coordinate. so does it make any differences between the mesh type? :confused:

melissa May 7, 2009 10:35

Nope! Just quicker.:)

ck5285 May 7, 2009 22:35

is there any guideline to understand what application is more suitable for either cartesian vs cylindrical mesh?

melissa May 8, 2009 17:44

When using cylindrical it is suggested to use 2-D with an angle less than 90 degrees. The simulation can still be viewed in 3-D by revolving the results. This speeds up the simulation time but is generally only used for flows that are symmetric. If they are symmetric and cylindrical then cylindrical mesh should be used. A cartesian mesh can also be used but it will have to be 3-D and may take longer to run. When comparing drag on a sphere using a cylindrical mesh 45 degrees and a 1/4 cartesian mesh the results were almost identical but it took longer in cartesian. Hope this helps:)

ck5285 May 11, 2009 20:50

do you have any paper/document on mesh type comparison that can share with me?

melissa May 12, 2009 11:31

No. I don't have any papers but it would be good. As a general rule if the problem is axisymmetrical use cylindrical. If you are unsure test it against a cartesian.

ck5285 May 12, 2009 20:26

noted and thanks for the inputs.

All times are GMT -4. The time now is 16:38.