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Plot the results of multiple time steps in one graph
Hi, I would like to plot the 2D contour plots of different time steps in one graph, is it possible? For example, in a time-dependent FSI model, at t=0.1s, I plot colour contour with an expression:...
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Surface Integration withing a definite area
Hello, I am new in Comsol and trying to calculate the total magnetic flux within a certain area. That area is a portion of a larger plane, but I am willing to find the value within that area only....
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Need help with a question !
Hi ! Please help me out with this question with the detailed explanation ! Its a bit of urgent.
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Complex conductivity in RF transient model and absorption boundaries
I have been studying a Gaussian beam incidents on an absorbing material. The result is reasonable before the wave hits the material, but starting to give strange results afterwards. Especially, when...
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Transport in diluted species
Hi, In my simulation there is a hollow sphere and time dependent mass transfer takes place from this sphere to the surrounding fluid. At the outer surface I am specifying the flux condition. At the...
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How to connect FEM resistance model to the Electric Currents Interface?
Thought about Termianl and External I vs. U but can't set the features correctly.
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Boundary Load Change Having No Effect.
Hi there, I am new to COMSOL and still learning it's functionality. I am trying to apply a strain on the 4 fan edges (boundaries 13,14,18,20,29,30,43,44) of my structure and view it's resulting von...
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elastic-perfectly plastic diffusion problem
Dear all, I am simulating the diffusion induced stresses in a sphere. I did the simulation for elastic case (multiphysics structural module with pde) . Now as a next step i see the stresses are high...
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varying of beam deformation Vs pressure appilied
Hello, I would like to say that i have choosen solid mechanics physics, stationary study but when i vary the pressure on deforming surface of my cantilever beam that surface deforms but when i vary the...
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Strange behaviour when solving stick slip problem
Hi, I'm modeling a simple stick slip problem using a block on a beam. The beam has a prescribed sawtooth displacement which results in the block sticking to the beam at low accelerations and slipping...
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how to constrain displacement of the rotation axis?
Hi I simulate torsional micromirror using electrostatic actuation. The electrostatic force make a rotation and vertical displacement of the micromirror. I want to constrain the vertical displacement...
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Point Evaluation
Hi there, I am trying to evaluate the von Mises stress at a specific point from a parametric sweep. I am able to evaluate just my standard "study 1/solution 1" but when i change it to my parametric...
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Solving differential equations (Diffusion and Reaction) using the Mathematics...
Hi all I'm trying to learn a bit of mathematical modeling of chemical reactions whilst combining it with the Mathematics physics of COMSOL. I am however, in a bit of trouble and I hope you can help me...
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Laminar flow through a cube with a hole at bottom
Dear Comsol users, I am relatively new to comsol, but have been working for quite sometime. I was just wondering why is it so difficult (not converging even after 100 iterations) to solve a laminar...
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transform coordinate system
Dear Comsollers I am aware of the coordinate system available under definitions that allow us to define conditions in different coordinate system. My question is whether it is possible to use...
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Force on object in magnetic field
Hi, I'm trying to calculate the force on a block of stainless steel, as a result of a magnetic field. The plot of the magnetic flux density looks good. But when i calculate the forces on the block...
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Applying no-standard boundary loads in structural mechanics
Dear COMSOL community, I would like to perform a stress analysis on a Synchronous Reluctance Machine in order to investigate the stress and displacement on the iron bridges. The difference in my study...
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Minimum element quality statistic documentation
Hi you all I'm looking for documentation of Minimum element quality. I found this quote: "Minimum element quality statistic is a telling one. Usually, a value greater than 0.1 is all we need." in...
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Velocity Oscillation near No-Slip Boundary
Dear All, I found a problem in my 2D comsol simulation when I am solving N-S equations in cylindrical coordinate. I use the creeping flow and neglect inertial. And I use P1+P1 discretization. My...
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Meshing helix geometry
Dear Ma'am/Sir, I am trying to mesh helix geometry since last 1 month, but everyday i encounter new errors. So, till date i have seen 15-20 type of meshing errors. I tried different meshing techniques...
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