| Author | Message | ||
     Fernando Buezas (fernandob) Member Username: fernandob Post Number: 5 Registered: 02-2007 |
Dear Nelson: can I use the "point value" command in 3D problems? I have tried to use it but I believe that flexpde ignores it | ||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 817 Registered: 06-2003 |
Because 3D domain construction is segregated into 2D projection plane and extrusion layers, there is no semantics for specifying the Z position of a POINT VALUE. So the construct is not useful in 3D. But point values don't work very well anyway. Many PDE systems allow localized "spike" solutions, and the POINT VALUE usually just superimposes a spike on top of the solution you would have got without it. You are better off with a more distributed control, like a small box or plate. |