Solid mechanics and element settings
Hi! I am analysing stresses and displacements of simple 2D steel plate with Comsol 4.2. I need to get results calculated by triangle linear plane stress elements for comparison. How can I change...
View ArticleHow to calculate the displacement of crack
I need to find the displacement (u) of a crack on a 2D centre crack plate under a load. I need to find how large the crack has gotten under the load How can I do this?
View Articlemef in time dependent
Hello to everyone. I have one question regarding the possibility to carry out a Time Dependent Study in mef. There is one good example of Integrated Square-Shaped Spiral Inductor...
View ArticleHeat loss in hydraulic hose
Hi, I'm working on an project where it's in my interest to find the heat loss to the surroundings, from the hydraulic fluid inside a hose. I have access to Comsol Multiphysics 4.3 through my work and...
View ArticleScaling of motional mass
Hello everyone, Thanks to this forum I have found out how to calculate the motional mass for different vibrational structures. The calculation of (MPF_mod1.u^2)/(TotalMass) and for v and w gives a nice...
View ArticleProblems with boundary layer meshing
I am trying to mesh a k-epsilon model and cannot generate a boundary layer mesh. My model has a very narrow region and I expect that that is the problem area. The error I get most often is: Could not...
View ArticleSPIRAL HEAT MODEL
HI, Just i want to know howl can i change the height of the COSOL spiral heat model, it's around 6mm, and i want to make it at 60 mm thanks
View ArticleHow to analysis a muffler(decibel & Frequency rate of outlet)? please help!!!!
Hi guys! I have a model muffler of an exhaust that will to analysis. i will to measure Sound intensity(db)& frequency of outlet. i show a picture of my muffler in this picture(I show inlet &...
View ArticleProblems about Periodic Conditions in the tutorial model “Periodic Boundary...
Hi all, Recently I confront one confusion about periodic conditions in the tutorial model - Periodic Boundary Condition. In Periodic Condition, it selects only boundaries 1 and 6 which are parallel...
View ArticleHow to define AC voltage and the direction of AC current in comsol
Hello, guys: I am a new user to Comsol and I am currently doing electromagnetic single phase power transformer model using comsol. The Physics i am using is Electric Currents (ec), Magnetic and Fields...
View ArticleMetal film with subwavelength size hole: Transmmittance and reflectance study
Hi I'm novice in comsol RF simulation. I'm trying to simulate transmittace and reflectance throught metal film with subwavelength size hole. My structure will consists of Air/metal/semiconductor...
View ArticleContinuing Modeling Issues with 2D & 3D piezoelectric SAW model
Hello all, I’m in desperate need of help with my model. The initial model setup is a 2D cross-sectional SAW device where I have silicon, a metallic electrode as my ground, a buffer layer, a...
View ArticleParticles traveling through boundaries
Hello All, I am attempting to use the particle tracing function on a laminar flow in a small channel with obstructions in the channel. I modeled the design after the lunchtime seminar on the particle...
View ArticleEigenfrequency seems right, but displacement units are totally wrong.
Dear Comsol Community, in the model attached I have a 20 micron long beam using the Solid Mechanics module to get the Eigenfrequencies. I calculated them manually using Euler-Beam theory and the first...
View ArticlePreparation of figures for papers/thesis?
If it has been written somewhere, can someone point me to where there is a guide to producing figures from 2D plots? I am using COMSOL 4.2a, and want to use some surface plots alongside legends of the...
View ArticleRF Source
Hi, I want to apply a current or a voltage source to a rectangular surface in a COMSOL RF module problem. Would you please let me know how I can do that? Regards, Elham
View Articlemust i compute the whole programe again?
Hello, I am a beginner of comsol. Most of the time, i made mistakes and got different solution from references. Then i changed Model settings and tried to find the right solution. But usually it take...
View ArticleModelling Metallic Diaphragm
I am a novice COMSOL user using the software for a student project so apologies if my problem below seems simple. I have a 2D axisymetric model of a thin metallic diaphragm (approx 25mm di and 0.025mm...
View ArticleLimiting simulation volume/area or displacement for mechanical model
Hey, while doing a buckling study of an optical fiber I tried including a fixed box around the fiber to constrain the movement of the fiber within this box. Sadly this increases the required simulation...
View ArticleHeavyside-Function and Divison by Zero
Hi I stumble realising a Gaussian-beam like in the tutorial model "Nanorods" (using RF-module). Problem: Part of the wave function has a singularity: constant/z Solution in tutorial: Define a...
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