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Simulating a magneto-electric media
Hi, has anyone used COMSOL to simulate the magneto-electric media. If yes, please do contact me, i need some discussion. Thanks
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Define or change domain number/name
Hello, I´m using Livelink with Matalb to do a simple study. In my code I generate 3 diferent geometrys with a while and when I try to define materials it gives an error because the domain number are...
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Simulation of magnets to get magnetic flux density
Hello! I am new to COMSOL. I have done the geometry of two magnets in the file attach. Then I start a stationary study. How to get the result of the magnetic flux density? If possible, how to make the...
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Ray optics-light scattering
Hello All, I am trying to find the way to calculate the scattering cross section or diffuse coefficient for glass surface with hexagonally packed micro lenses. In other words, I just need estimate the...
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How to calculate Moment of inertia.
Hi! I need to find the moment of inertia of a cantilever beam. Anyone knows a way to calculate it? Which study we should do? Here I attached my model.
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Meshing
Dear Comsol Users, how I can make meshing for tow parts, they are cylinders, but one of both is too big In comparison with other one. the first Cylinder R: 16 mm Hight: 10000 mm the other one R: 30000...
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comsol connection with matlab
Hi i have geometric as attached , i measure the max. electrical field from prob . i save the geometric as m. matlab file . the problem is how can i have the result of max electrical field from matlab...
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Basic steps in designing PCF in 4.3
Hi , I have to design hexagonal PCF structure with 7 airhole rings with d=.75micrometer and pitch=1.45 micrometer for analyzing it characters like birifergence,dispersion,confinement loss, non...
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Relative permittivity of Gold at a frequency of 104 MHz
Hi, I need the value of the relative permittivity of Gold at a frequency of 104 MHz. I found values at optical wavelengths. Thanks. Best regards, Nadia
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AFM SCANNER
Hi All, I am very new to COMSOL. Could someone kindly tell me which module in COMSOL is suitable for simulating an Atomic force Microscope (AFM) scanner? For those not familiar with AFM, the scanner...
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drawing the cross section of an induction motor
hello... i want to draw the cross section of the induction motor with all the slots in stator and rotor. i have attached an image of the structure. please help me drawing this. i am not being able to...
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parallel strip capacitors with small current injection
Dear All, I have a 3D geometry for a simulation of a capacitive tool, made of thin parallel metal strips. I have laid out parallel thin metal strip layers in space, with some insulator in between. I...
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live connection comsol with matlab
Hi i have comsol 5.2 version , in my computer i have matlab 2014a and 2015b . i dont know in default the comsol has connection with matlab 2014a but i want to change the connection to 2015b but i don't...
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Stiffness/Residual Vector Error - NaN/Inf findings
Hi, I am especially writing this, because there is no specific explanation I found online. I checked the BCs and other variables, but could not find any mistakes. I am working on a semiconductor device...
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Using values from the "Equation view" section as input in a Coupled Multi...
Dear All, I am doing a Multiphysics modelling on the formation of an ultrasonic standing wave field that is used to separate suspended particles in a continuous medium (a colloid). As you can see from...
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Anisotropic thermal conductivity with falloff question.
Hi all, I'm trying to define a base material with isotropic thermal conductivity, but with a penetration zone along one axis where the k value falls off from the outer surface toward the center....
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A Bug in Particle Tracing Module??
Dear all, I wanted to use the mathematical particle tracing interface in a 2D-axisymmetric geometry, the particles are obtained from a text file and loaded into the simulation using 'Release from data...
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Relative permittivity from text file
Dear all, I would like to use the relative permittivity fit for silver provided by the FDTD Solutions software by Lumerical. I exported this fit as two ASCII text files consisting of two columns...
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normal to edge in 3D geometry
Hi, I have curved edge on one of 3D box surfaces. I want to move this curve in normal direction, I have defined using deformed geometry prescribed mesh velocity, and also tried prescribed mesh...
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axial symmetry in general form PDE
Hi, I have built a 2D axisymmetry model with general form PDE to solve mass transport, but I cannot set the axial symmetry boundary since there is no such option, even for the zero flux the symmetrical...
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