http://www.FEA-Forums.com/ FEA Forums » Topic: How to boundry condition for air in electrostic analysis en Tue, 07 Feb 2012 23:35:28 +0000 http://www.FEA-Forums.com/topic/134#post-157 Wed, 30 Dec 2009 21:18:39 +0000 wizardz 157@http://www.FEA-Forums.com/ <p>I have some problem in electrostatic coupled-field analsys.</p> <p>I have a MEMS capacitive actuator which incorporates irregulator shapes of air. I use 2D simulation now. </p> <p>Is it always necessary to set the edge to air to UX,UY to zero?</p> <p>I sometimes observed very weird large deformation of air. If I do not define the edge of air to UX,UX zero, the deformed shape sometimes show that the inside node will leave away from the air material.</p> <p>Thanks! </p>