3D bubble model

ekh95 · March 27, 2009, 17:25

I am working on creating a thermal bubble to simulate an inkjet. So far, 2D model worked OK. However, I couldn't generate a bubble for 3D models. Is Flow3D capable for this purpose? All examples I have are axisymmetric 2D cases. Is there any tip about this?

E.

H.C · March 28, 2009, 00:28

what did u mean by u couldn't get a 3d thermal bubble?

ekh95 · March 31, 2009, 20:56

Now, I can model a thermal bubble in 3 D structures. For a bubble jet, I am still curious about what are the proper boundary conditions for the interface between the nozzle mesh and the bottom of the mesh (symmetry ??) which defines a drop path and the drop exit of the mesh (pressure or continuity)?

E.

melissa · April 1, 2009, 11:32

If there is going to be no affects to the flow from the boundary then symmetry would be fine along the path and I would suggest using a pressure for the exit since it is more realistic.

ekh95 · April 29, 2009, 19:09

In the bubble model, there is an accommodation coefficient. How can I get it for water vapor on wafer surface? Two models which I saw used 0.05 for this. Is it typical?

E.

March 27, 2009, 17:25	3D bubble model	#1
ekh95 New Member Join Date: Mar 2009 Posts: 9 Rep Power: 17	I am working on creating a thermal bubble to simulate an inkjet. So far, 2D model worked OK. However, I couldn't generate a bubble for 3D models. Is Flow3D capable for this purpose? All examples I have are axisymmetric 2D cases. Is there any tip about this? E.

April 29, 2009, 19:09	accommodation coefficient	#5
ekh95 New Member Join Date: Mar 2009 Posts: 9 Rep Power: 17	In the bubble model, there is an accommodation coefficient. How can I get it for water vapor on wafer surface? Two models which I saw used 0.05 for this. Is it typical? E.

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March 28, 2009, 00:28		#2
H.C Member Join Date: Mar 2009 Posts: 40 Rep Power: 17	what did u mean by u couldn't get a 3d thermal bubble?

March 31, 2009, 20:56		#3
ekh95 New Member Join Date: Mar 2009 Posts: 9 Rep Power: 17	Now, I can model a thermal bubble in 3 D structures. For a bubble jet, I am still curious about what are the proper boundary conditions for the interface between the nozzle mesh and the bottom of the mesh (symmetry ??) which defines a drop path and the drop exit of the mesh (pressure or continuity)? E.

April 1, 2009, 11:32		#4
melissa Member MC Join Date: Mar 2009 Posts: 56 Rep Power: 17	If there is going to be no affects to the flow from the boundary then symmetry would be fine along the path and I would suggest using a pressure for the exit since it is more realistic.