Fluid structure interaction
Hello I am very new to comsol. I am working on the fluid structure interaction on an elbow pipe. I have the image of the model posted here. I have the fluid as concrete flowing through the pipe. I want...
View ArticlePennes' Bio-heat transfer equation weak form
Hello everyone I need to implement Pennes' Bio-heat transfer in comsol but cannot use the module that comes with comsol. I am thinking that using weak contributions is a good way. Does anyone know how...
View ArticlePotential coupling of two surfaces without contact
Hi everyone, I am a beginner in comsol. I want to know how to achieve potential coupling on two surfaces without contact, which is similar to the effect of short circuit or being connected, and current...
View ArticleHow do you create a Gaussian beam in comsol 5.2a?
I have simulated the example "Optical Scattering Off a Gold Nanosphere". I want to change the incident plane wave into a Gaussian beam, what should I do? Sincerely
View ArticleRepeated error test failures. May have reached a singularity.
I am using comsol 5.4. I am trying to solve a coefficient form PDE along with Electrical Circuit, Electric current and Joule heating. I am getting the following error message. "*Repeated error test...
View ArticleContinuity problem for shell type physics
Dear Comsol community,I am creating a structural model of two plates connected through a frame for which it is important to use only surfaces since the thickness is small and the model needs to have...
View ArticleHow to input drain voltage of n-channel MOSFET into physical model?
I am using Comsol 5.4. I am working on the physical model of Resistive RAM. I have to connect bottom terminal of model to the drain of n-channel MOSFET which I am taking from Electrical circuit module....
View ArticleHow to extract COMSOL data to MATLAB
Hi,I use COMSOL 5.3a for running EMW simulations. So, I want to extract data of surface electric field to MATLAB in x by y matrix, and want to handle these data. However, when I extracted data in the...
View ArticleHow to give Drain Voltage Of N-Channel MOSFET as an input to a Physical Model?
I am using Comsol 5.4. I am working on the physical model of Resistive RAM. I have to connect bottom terminal of model to the drain of n-channel MOSFET which I am taking from Electrical circuit module....
View ArticleMode volume calculation of Photonic Crystal Defect
I was trying to simulate a Photonic crystal defect in COMSOL. My model is a square array of dielectric cylinders in air matrix with a point defect at the center. I want to calculate the Q-factor and...
View ArticleRigid Connector example
Hello everybody! Can anyone kindly explain me how "Rigid Connector" works? Which is the difference between using Rigid Connector or simply creating pairs? Any example? Thank you everybody for the help!...
View ArticleBoundary conditions piston with membrane
Hello everyobdy and thanks to those who will help me! I want to model the following system: a piston wrapped in a toroidal membrane. The external boundary of the toroid must be fixed, while the...
View ArticleE-plane bending and H-plane bending
Hello, I want to bend microstrip patch antenna in 3D to make it a curved patch antenna. How can i do it.
View ArticleSinusoidal force on a plate interacting with the surrounding fluid
Hello We are trying to simulate a Fluid Structure Interaction (FSI) between the piezofan and the surrounding air using COMSOL. We managed to simulate the piezofan using Eigenfrequency for the...
View ArticleCopying Geometry steps to another comsol file.
Hi,Is it possible to copy the geometry part of the component and use it in another new COMSOL file.Regards
View ArticleCreating thermodynamics function of CO2
Good day all,is there a way to intoduce CO2 into COMSOL, in which the properties (ex: density, viscosity, etc) are temperature and pressure dependant?Best regards,Nico
View ArticlePlasmonic Waveguide Analysis.
Dear all,I am a beginner in this software. I am trying to get the numerical solutions of a typical plasmonic waveguide, consisting of a thin film sandwiched between the cladding and a substrate (like a...
View Articlewhy multiple modes in rectangular cavity when it is coupling?
When i am performing a simulation of 1 cm radius cylindrical cavity with comsol multiphysics, the obtained frequency eigen value for TM010 mode is 11.47GHz. But when I am adding the coupling structures...
View ArticleAccessing Structure from Matlab Workspace
Hello,In earlier versions of Comsol-Matlab we could reach to structure from workspace and by just clicking we could be able to see the details of the structure. For Comsol 5.4 how can we do that? Can...
View ArticleHow to convert from electric field to optical force in comsol 5.2a？
I am comsol beginners, and I want to simulate the optical force of the gold nanosphere. But I don't know how to convert from electric field to optical force in comsol. The main thing I don't know is...
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