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Hello Discussion Forum users!We've updated the look and feel of COMSOL Access. My favorite feature: you can upload your own profile picture to replace the geometric avatar we assign you by default. To...
View ArticleMeshing help
I am new to Comsol. I got a basic training and some goto documenation. However I got a customer cad drawing and would like to do magnetic simulations. Painstakingly the meshing seems to be difficult to...
View ArticleFloating electrostatic potential at Metal Contact
Hello, I'm using Semiconductor Module to solve drift-diffusion equations for a solar cell in 1D domain with two Metal Contacts (both Ohmic) at left (A) and right (B) point of the domain. Traditionally,...
View ArticleLow Field NMR Permanent Magnet
I want to design permanent magnet for low field nmr systems. I'm not a newcomer yet. physically I chose Magnetic field no current (mfnc). I've designed the necessary geoemetry. I defined the outer...
View ArticleHelp with Torpedo
Dear guys I have a torpedo running underwater upstream. I want to simulate the torpedo change the depth. For example: initially, the torpedo is at 100 m below the water surface with v = 1m/s (just an...
View ArticleImproving the accuracy of length
Hi there,I am running a simulation of a mechanical mechanism.I have a problem about the accuracy of the length in COMSOL.The minimal is 0.001mm, which is not small enough for my simulation.Is there any...
View ArticleAcoustic / Ultrasonic related queries
It is related to Acoustic / Ultrasonic. There is sink of SS material of dimensions 445 x 430 x 225 mm which is filled with water. There is a transducer at bottom of sink. Top of sink is open. By giving...
View ArticleTip reaction forces for a clamped-roller beam
Hello all,I am building a model to predict the deflection of an actuated beam; both for a single segment uniform beam and a segmented beam with indepedent actuation in each segment. The model is...
View ArticleAppropriate modeling for tuned mass damper attached to a solid mechanics model
Hi: I want to model a tuned mass damper(a damping system with a mass, stiffness and damping) which is attached to a solid mechanics model, but I can not find the effective way. I tried lms system, but...
View ArticleVenturi pump
Hi,for our project we are currently trying to replicate the perfomance of a venturi pump (that we bought) in a simulation:...
View ArticleSolute concentration distribution: Matlab to Comsol
Dear ColleaguesI had some problems implementing the Matlab results into the Comsol simulation. I'm a beginner of Comsol, so I don't really get the feeling how to link the results between Matlab and...
View ArticleXenon collision cross sections
Hi! I am trying to model a xenon plasma device and therefore I wanted to import the xenon collision cross sections. I found useful data for each excitation level. However, I wanted to combine certain...
View ArticleVelocity Impact Simulation
Hello!I am rather new to COMSOL and I need assistance with conducting velocity impact testing simulation within COMSOL, where I am trying to simulate impact testing from a Split Hopkinson Pressure Bar...
View Articleincompressibility condition for a Darcy's Mod
Hi, I am using Comsol version 5.4 and a Darcy's law. The problem is that I do not find how to change the value of the Qm parameter to make my problem incompressible. Is there a way to do it? Thanks, AM
View ArticleStator permanent magnets orientation
Good afternoon,Im doing my thesis in COMSOL, 2D, and i have a doubt about how to orientate PM that are put in the stator. Im working with a double salient machine, based on an article, and the same...
View Articlesolid to liquid time dependent phase transformation
i am trying to solve solid to liquid time dependent phase transformation, it is a part of bigger problem of induction brazing simulation, i have gone through continous casting example but that is...
View ArticleNon-Linear solver convergence error in multi-physics problem
Hiii, I am going to introduced my model physics and setup first and error in solving this is discussed towards the end. I have made a bubble-blood-vessel 3-D model. This contains blood vessel (10 um...
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Single Port Coplanar Waveguide Resonator for measuring reflection
Hi all,I am trying to simulate a coplanar waveguide resonator and obtain the resonant frequency and Q-factor using RF module in COMSOL. I used the lumped port boundary condition and with two ports...
View Articlemaximum operator gives wrong values
HiI used maximum operator to find the maximum of a quantity over a specific surface but I don't get a correct value. Although for other quantities I get correct value.Any suggestion?
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