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Geometric nonlinearity

Hi, I have used structural mechanics to simulate an indenting sphere on a half space polymer film. I am changing the elastic modulus of the polymer film to go from hard material to soft material. I am...

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Heat Transfer in Soils

Hi, I am a comsol user and I want to have a 2d axisymmetric model. In my model, I have a soil sample that I put a steel bar in the soil. I want to heat the steel bar with a constant temperature 500(k)...

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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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Plotting the gap distance variable

I am trying to do something very simple, but it doesn't seem to be intuitive. I have a contact pair in the structural mechanics module and I want to plot the gap distance variable as a function of...

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Calling variable or convert T(x,y,z) = >T(x,y,t) between models

Hi: Please help! I'm very stuck with a quite straightforward problem. I've got two models: 1) Model 1: 3D Heat Transfer Stationary 2) Model 2: 2D Teat Transfer Time Dependent. How can I call T(x,y,z)...

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eddy current

how to get the imaginary component (phase) in the inductor in the high-frequency alternating magnetic field? Comsol 4.2a Help me please

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Use of Ports to calculate the Transmittance and Reflectance of an array of...

Hi everybody, +Problem: I want to simulate an square array of gold nanorings, in order to get the graphs for the transmittance and the reflectance and find the resonant frequency. +My first approach:...

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Not able to properly use remesh feature in multiphysics stationary simulation

Hi, I have simulated a steel specimen that becomes deformed due to bending. For that, I use the solid mechanics interface in a stationary study. Parametrizing the magnitude of bending also works....

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"No frame is defined for 0D applications"

Hello again. I am trying to simulate an E-core transformer. When I click the study 1 and select the show default solver there is an error occurs "No frame is defined for 0D applications" . What is it...

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"Nonsymmetric matrix found" error and meshing

Hello, 1 - I'm simulating a Newtonian incompressible fluid flow in a porous medium (medium formed by 1000 solid grains). For a mesh of 124816 elements, the computation runs normally and I get results....

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Troubles with reading COMSOL text data files and files with interpolation...

Hello everyone! I have some troubles with creating my own reader for COMSOL text data files and files with interpolation functions. I have read "The COMSOL File Formats" section of...

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CAD data for KEMAR

Hello. I have seen papers with scans of the KEMAR manikin, such as from Mads Jensen when he was at Widex. I am in need of CAD data (e.g. STEP file) for the KEMAR head. Does anyone have such data? Would...

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Electrodeposition of chrome

Hello, We are trying to model a chrome plating process with a non-dissolving (inert) anode. We used the Tertiary, Nernst-Planck module with a moving mesh. We set up the electrodes as "External...

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Error in Jacobian

Can I know what the error means??"Failed to find consistent initial values. Segregated group 1 Failed to evaluate operator Jacobian. Operator: nif, Geometry: 1, Boundary: 12 13 14 15 17 18 19 20 24 25...

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Boundary condition at interface of two different materials in structural...

Hi, I am trying to simulate a structural mechanics problem that utilizes 3D solid stress-strain module. I have a square plate of elastomeric material having a thikness in micro meteres and on top of...

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Changing License

I wish to change the license of my COMSOL software from my institute's "Floating License" to "Trisl Version". Can I know how to do??

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Function as parameter.

Hello It is possible to use a function as a parameter in the geometry. For example, replace the radius of the circle function of time. Thank you.

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Problems with sweep mesh

Hi, I have been trying to sweep mesh a domain (3-D). It will be like a small straight tube of rectangular cross section and having turns at right angles (like a serpentine). I tried to mesh the source...

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Imported SolidWorks part doesn't behave correctly

I'm relatively new to COMSOL but I haven't had much luck finding a solution. I had an assembly in SolidWorks made of 3 parts. I created a new SolidWorks part file which had the 3 parts mated together...

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state space

Hi, when we use mphstate to export state-space model, can we know the physical meaning of each states? Any help is appreciated. Thanks

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