Discussion Forum

Hi, I'm new to COMSOL. I'm trying to get a plot of the pressure distribution on a cut-plane of a cube. I have applied a boundary load of 4 MPa to the upper surface of the cube and fixed constraint to the bottom surface of the cube. Now, as a check, when plotting solid.pm at the upper surface, the pressure is not uniform and is around 3MPa at the centre. So, I think I'm not plotting the right function as I specifically told the program to apply a uniform pressure of 4MPa at the surface. What expression should I put to plot the pressure and how can I make it appear in the available plot list? I've tried also solid.pm and solid.cp, which are the only expressions available in the list, but they too give a wrong result. I've tried adding the pressure as a variable in the definitions, so that it should appear in the list of available plots in the result, but I don't know what to insert in the Expression space in Variables node. Any help is very much appreciated. Thanks, Leonardo.