Apply outward radial pressure of same magnitude on a inner 2D ring (new)
Posted Oct 18, 2020, 4:23 PM EDT 6 Replies
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Hi I just would like to ask you a question in Comsol simulation, as I tried many times, but still get the same problem over this weekend. The objective was to obtain the relation between the pressure and the diameter of a 2D ring structure.
Firstly, I create the 2D ring as attached. There are two circles (inner and outer) and each circle is made up of four curves which can be generated by selecting 'circle' under geometry.
Then, I select 'pressure' under the boundary load and apply the pressure of the same magnitude of 5Pa to each inner curve. Then, I always get the same simulation issues as attached.
Then, I attempted to address the problem. Initially, I was thinking there could be an error in the direction of pressure and hence I tried to apply a fixed boundary condition to one edge of curve and apply 5 Pa to another edge as attached. Then, from the simulation result as attached, I realized the positive pressure direction is directing radially outward, so there is no problem in the direction of pressure that I have chosen previously. However, I also realized that the reason that the simulation issue occurred is there was no fixing boundary condition as I discussed with you last meeting.
I will very appreciate if you can give me the correct solution for that
Thanks for your time Best wishes Junwei