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How to rotate a 2D Plot?
I built a model with a 3D geometry. Unfortunately the created 2D plot (postprocessing), which is based on a cut plane, is rotated by 90°. Is it possible to rotate the 2D plot back by 90° or to exchange...
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Properties of magnetic flux in some transformer sheets
Hello everyone, i´m trying to observe the magnetic flux density in a smal gap of some transformer sheets. So far building the model and getting results that are in consent with my experimental setup...
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Surface growth and moving mesh (ale) ?
Hi, I am building a CVD growth model using the heavy species transport, much similar to the silane growth model. My geometry includes a small trench (um scale), where I deposit the material. Is it...
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"Error: Duplicate variable name."
I am using solid mechanics, electrostatics and moving mesh and I want to perform an Eigenfrequency Study. The solver crashes with an error message:"Error: Duplicate variable name." But I didn't find...
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How to pass result from one module in to another module.
HI All I am working in two modules, Structural mechanics and Electrostatics. I want to pass the result of the Structural mechanics module as input in to the Electrostatic module. For example: I want to...
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stability of geometry creation
Suppose that the geometry is not simple enough to be represented by regular geometry primitives. Then, there are two chooses: 1- use of parametric surfaces (possible as external function) 2- use of...
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Calculating contact area
Is there any way to calculate the contact area of a contact pair within COMSOL (ie without having to post-process data in MATLAB, which I have yet to try)? I have tried surface integration and other...
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Using geometry values in physics boundary conditions
Hi all, I have tried to look around but have not figured out a way to do this. I would like to use a geometry value (i.e. the surface area of an ellipsoid) to define the flux boundary condition through...
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Heat conduction in solids - temperature dependent heat transfer coefficient
Hi, I would like to solve a simple heat conduction in solids problem with a temperature-dependent heat transfer coefficient at one of the boundaries h(T) = 1000*(300/T)^1.3 However, the result computed...
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Unphysical solution with ellipsoid/sphere vs. hemisphere
Having a problem with COMSOL providing unphysical solutions when I use a sphere or ellipsoid "hovering" above the bottom of a domain as opposed to a hemisphere. I have a box, and within the box is a...
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S-Parameter in Complex format in COMSOL
I have not yet been able to find how COMSOL represent complex format of S-parameters. Can anybody please provide the correct format with reference? I am wondering if it is like S11=Re(S11)+j*Im(S11) or...
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2D electrostatic Force
Hi, I am modeling a slice of a simple comb capacitor in 2D. I would like to determine the force acting on the fingers. I can calculate the electric field, but when I try to determine the force through...
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Is the problem positive definite? Floquet periodic boundary conditions or PML...
Hello, I am doing some elastic wave simulations using solid mechanics module and piezoelectric module. And sometimes the DOF of my models are quite large so that I have to choose the solver manually to...
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How to rotate a 2D Plot?
I built a model with a 3D geometry. Unfortunately the created 2D plot (postprocessing), which is based on a cut plane, is rotated by 90°. Is it possible to rotate the 2D plot back by 90° or to exchange...
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voltage at different coordinates
Hello every one. it is possible in COMSOL to fine the voltage at (x,y,z) coordinates? thank you
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Undefined value found.
I am using poroelasticity module to simulate soil behavior of porous materials, the error information is as follows: Undefined value found. - Detail: Undefined value found in the stiffness matrix....
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Adding temperature varying with time
I want to enter temperature for calculating heat flux (temperature varies with time). Is there any method of entering the values? How can I use functions like interpolation, Rectangular etc,,,
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Gas in Thermal Stress
I am trying to characterize a flaw in a structure (a hole filled with air) for a thermal stress simulation. From a structural point of view, the gas has a Young molulus of zero which cause the...
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COMSOL Error Message
Hi I've been problems with COMSOL in Plasma Module The following feature has encountered a problem:"The source selection for the operator intpot1 must be nonempty. Error in multiphysics compilation. -...
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Why COMSOL still requires the Young's modulus and Poisson ratio when defining...
Hi all, I want to play with Comsol for 3D simulations of linear elastic material. The materials are anisotropic so that I define elasticity matrices for them. But Comsol still requires me to give...
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