Import Geometry from MATLAB to COMSOL
Hi, I am new to COMSOL. I have a biological tissue geometry that I got from MRI images into MATLAB. Now I wish to import that geometry from MATLAB into COMSOL to simulate bioheat transfer. I have read...
View ArticleLinking problem when developing GUI with java API
Hello everyone! I am trying to develop a custom GUI in java using COMSOL API. I am following the guidelines in the API Reference, but if I try to paint the result on the GUI, I get a linking exception...
View ArticleHow to applicate a magnetic field on a sensor
Hello, I'am new to COMSOL. I wish to applicate a magnetic field on the metal electrode of a surface acoustic wave sensor, But I did't found the way to do it. Thank you for your help myriem
View ArticleHelp with Dielectrophoresis simulation
Hi, I am very new to COMSOL and DEP (Dielectrophoresis). I have got a simple model through the AC/DC module and I have made the simulation in DC mode instead of AC for simplicity purpose and I have...
View ArticleMultiple input ports in RF problems
Hello to everyone. The RF module Users Guide, at page 72, says (Note at the top of the page) that it is possible to have more than an excited inport, with the drawback that S-parameters are not...
View ArticleNatural Free Convection
Hello, I'm attempting to model the temperature rise above ambient over the period of one day within a sealed concrete trough buried in soil with its top exposed to outside air. I have successfully...
View ArticleMeaningul drag output
This is a working stationary turbulent flow model. I have created an integral solution set around the boundaries of the object id like to determine lift and drag for. All posts i have read involve...
View ArticleMeshing in matlab
Hi, I am having real difficulty to control my mesh in matlab. Basically I don't have any control over it. Its quite a simple model but im finding that if I change the numbers in the code, I get the...
View ArticleNavier-Stokes Simulation using General Form PDE: The Continuity Equation
Greetings all. I am working to solve a standard fluid flow problem (e.g. flow in a pipe as a start) using the General Form PDE interfaces instead of the Fluid Flow built in GUI. I am able to define a...
View ArticleCoordinates in mapped system, expressions (X.Y.Z)
Hi there Im student, and working now on SAW Pressure sensor My PC have 4Gb RAM and I cant use 3D for this modeling. only 2D So, my surface material is ST cut Quartz, Euler Angles is (0;132.75;0),...
View ArticleHow prevent an object from penetrating another object?
The attached file has a simple case that is a precursor to what I really need to model. The simple case consists of a membrane (hyperelastic material model) with a small quartz bead located a short...
View ArticleUsing interpolation tables for temperature dependent structural and themal...
This will eventually be an analysis of the thermal and structural very steep pulses but for now I am keeping it simple. (stationary and moderate time dependent loads) In trying to defining some basic...
View Articlereaction is not happening in tubular reactor
Hello guys, I have designed a tubular reactor in comsol 4.2 but after computing it doesn't show any variation. my reaction rate id not changing my conversion is not changing. only axial flow velocity...
View ArticleVCCS
Dear all, I simulating a 3D electrode model and do not know how to use voltage controlled current source (VCCS) under electric circuits (ec). Can anyone help me where can I find examples using the...
View Articleeigen frequency
I'm able to get frequency in complex no can i able to get it in real no only
View Articleanalysis
I unable two get the same resonant frequency for eigen frequency and frequency domain solver
View ArticleLithium ion battery 1D model: solver error
hi, I am trying to solve the Lithium ion battery model from the model library (li_battery_1d). I am always getting this error message while solving study1 in it .Please help me on this. Repeated error...
View Articleapplying a magnetic field
Hello, I would like to know how to apply a magnetic field on metal electrodes of a Surface acoustic wave resonator using COMSOL 3.5 a. Thak you
View Articlecreating a coordinate system in the matlab console
Hello everyone, is there a specific function for drawing a coordinate system over the Matlab LiveLink in the Matlab console? I'm not yet familiar with all the functions concerning the LiveLink. My aim...
View ArticleDistance between two points
Hi ! Suppose I put two circles at position (0,0) and (0,2). If I rotate the second circle with respect to first(0,0) at a range (0,60,360), it gives a hexagon.Is there any way to confirm the distance...
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