My model is a 2D axi-symmetric numerical model, with a needle electrode in the middle and a quartz capillary at the periphery, helium is ejected to the outside from the annular gap formed by the previous two. What conditions should be set for the boundary（red logo）of the needle electrode and the capillary at z=0, can anyone tell me?
Hao Song
Anirudh Rana Thank you for your help, but I can't use zero flux boundary conditions on these two boundaries, the selection list suggests that these two boundaries are not suitable for the application. I‘m a new one and I have no idea about the reason, do you have any more detailed suggestions?
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