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Consumption of species
Hello everyone, I have a question because I'm not quite sure how to model it. I have a reactor (square) which contains a chemical component A. A can react to B with the help of a catalyst. I want to...
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Snow medium/material
Is snow material available in COMSOL library? If not, how can I generate the same.
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"Contact Pressure" vs. "Pressure"?
When I compute "contact pressure" and "pressure" on the contact boundary and export the data, I get different answers (attached). Does anyone know how does COMSOL caluclates "contact pressure"...
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Explicit Solid Mechanics
Hi I have a solid mechanics problem comprising a hyperelastic material (Mooney-Rivlin(2 params) that is placed under compression resulting in large deformation. The construction is such that contact...
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Temperature-dependent heat source
I have two power settings (domain heat source) on a radio model, P_transmit (~2W) and P_receive (~0.2W), and I am trying to implement what by every intuition should be a very simple switching statement...
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How to calculate Electric field at arbitrary point
Hello Everyone... I have designed a model in which light is scattered by a gold nano particles. Now i want to calculate the value of scattered electric field at any arbitrary point. Can anyone tell me...
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Piezoelectric material in Water Simulation
Hi all, I am trying to build a 3-D PZT 5H cube and put it in water and simulate it to get the impedance vs. frequency. I could build the PZT cube, but found trouble to put it in water. I am adding a...
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Dirichlet boundary condition
Dear friends， Does anybody know how to set Dirichlet boundary condition in the Comsol Multipphysics 4.2a ?
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mesh error - "Mesh of linking face must be a structured quad mesh"
I set up a very simple plate vibration model. The plate is surrounded by PML except a small part with a rib on one side. Please see the attached model file. I want to use free Tetrahedral to mesh the...
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Difference between Variable and Parameter
Hi everyone, what exactly is IN COMSOL the difference between a variable and a parameter? I know that Parameters are always global and I can choose whether I want a parameter to be global or not. But...
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finding coordinates of max/min values inside domain
Hi, I'm trying to find the coordinates of the max/min stress values in a specific domain. I can find the values of the actual max/min but I'm having a hard time finding the actual coordinates. I can...
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Strain Gauge on Curved Geometry
Hi all, I was wondering whether COMSOL would be a good choice to model the behaviour (electrical, mechanical) of metallic strain gauges printed on out-of-plane (curved) structures. The feature size of...
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Plasma chemistry assumption
Hello everybody I am modelling a plasma actuator used for aerospace application (boundary layer separation control, airfoil leading edge flow separation control). I am having a trouble in finding any...
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Calculation of far field scattering pattern
Hello everyone.... I have a doubt regarding calculation of scattering pattern in far field domain. I have simulated a model which gives the scattering pattern of nano sphere. But i want to calculate...
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Current due to induced charged in frequency study
Hi, I'm trying to find the currents (and resistive heating) in a metal object (e.g. a sphere) placed between a capacitor's plates, which has an AC current running through. The environment should be...
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Displacement in [mm]
Hello, I would like to determine the displacement of a point of a leaf spring. Unfortunately, the result is highly different from the actual construction, I proceeded as follows: - 3D Model - Solid...
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Non linear conductivity in AC
Hello, I need to simulate the behavior of a dielectric material in AC to obtain the electric field distribution. Normally I would use the Electrostatics study, but this material has a nonlinear...
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meshing
i want mesh it with 15x150 quadrilaterals can any body help me out for uniform meshing
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Problem meshing a high aspect ratio geometry
Hello, I am working on a model of electric field inside a detector for an experiment I am working on. The model is contained in a cylinder ~1 m tall and the smallest parts in the detector are 2 wire...
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Drift Diffusion and Heavy species transport coupling
Hello I am modelling an AC-DBD plasma actuator (model is attached). I have modeled my time-dependent ac circuit and have proceeded to include the drift diffusion model and heavy species transport...
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