InkJet Modeling

ck5285 · May 6, 2009, 21:15

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?

melissa · May 7, 2009, 11:35

Hi~
Nope! Just quicker.

MC

ck5285 · May 7, 2009, 23:35

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

melissa · May 8, 2009, 18:44

Hi~
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

MC

ck5285 · May 11, 2009, 21:50

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

melissa · May 12, 2009, 12:31

Hi~
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.

MC

ck5285 · May 12, 2009, 21:26

MC
noted and thanks for the inputs.

May 6, 2009, 21:15	InkJet Modeling	#1
ck5285 Senior Member Join Date: Mar 2009 Posts: 129 Rep Power: 17	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?

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May 7, 2009, 11:35		#2
melissa Member MC Join Date: Mar 2009 Posts: 56 Rep Power: 17	Hi~ Nope! Just quicker. MC

May 7, 2009, 23:35		#3
ck5285 Senior Member Join Date: Mar 2009 Posts: 129 Rep Power: 17	MC is there any guideline to understand what application is more suitable for either cartesian vs cylindrical mesh?

May 8, 2009, 18:44		#4
melissa Member MC Join Date: Mar 2009 Posts: 56 Rep Power: 17	Hi~ 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 MC

May 11, 2009, 21:50		#5
ck5285 Senior Member Join Date: Mar 2009 Posts: 129 Rep Power: 17	Melissa do you have any paper/document on mesh type comparison that can share with me?

May 12, 2009, 12:31		#6
melissa Member MC Join Date: Mar 2009 Posts: 56 Rep Power: 17	Hi~ 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. MC

May 12, 2009, 21:26		#7
ck5285 Senior Member Join Date: Mar 2009 Posts: 129 Rep Power: 17	MC noted and thanks for the inputs.