Wear Model - Solving a contact problem with irregular geometry
Dear COMSOL, I wonder if you could help me in solving this contact model in COMSOL 4.3. I am implementing wear by solving a quasistatic contact model using the Structural Mechanics module, extracting...
View ArticleModelling Cavitation Bubble Radius Oscillation using Equation Based Modelling
Hello, I am trying to model the radius, R(t), oscillation of a cavitation bubble in liquid (compressible) subjected to alternating pressure at ultrasonic frequency. I would like to model the radius...
View ArticleWaveguide Dispersion Curve
The MATLAB coding for solving second order differential equation(D(λ)=- (λ /c)*(d^2n/d λ^2)) of wave guide dispersion is heavily needed. I have values of effective index n, c is constant and variable...
View Articlescattering nanoparticle cross section
Hello Sorry my English is not perfect. I have to make a simulation of a gold nanoparticle (R = 20nm) hit by a plane wave. I have to get a chart: x-axis - wavelength (200nm-800nm) or frequency y-axis...
View ArticleMatrix has zero on diagonal
Hi experts, I mat a problem when simulate a AC/DC model. it came out as below: Failed to find a solution for the initial parameter. Segregated group1 Matrix has zero on diagonal. Returned solution is...
View ArticleCFD - Surface roughness
Hey guys I really need your help on this one! I was wondering if any of you could tell me about the default settings of surface roughness's in COMSOL? All I've found about it in the documentation is...
View Articleadding wavelength to waveguide
Hi please help me,i am new in comsol I want to add wavelength to waveguide. i know the wavelength that i use. but i dont know in which field i enter the wavelength. Thanks
View ArticleCauchy Stress
hi I´m modeling a plate. In the results branch I configurated a 2D plot to show "the Second Piola-Kirchhoff stress, xx component" using the expresion "plate.Sxx". I want to know if it's possible to...
View Articlemodeling of bone
Hello! I wanted to know if it is compulsory to use an equation based model if we are 2 study some stress and force properties on a 3-d model say bone.Given appropriate parameters and material details...
View ArticleCan someone provide some guidance on SERS simulation?
I am an undergrad and my research topic is about SERS substrates. Now I wanna use COMSOL to check whether the enhancement factor is in accordance with my experiment result. However, lacking of EF...
View ArticleProblem with Units
hello I´m using gravitational forces, but I want to use kilogram forces Someone knows how to use kilogram forces in COMSOL. For example "pound forces" are "lbf" and "pound mass" are "lb", kilogram mass...
View ArticleHorn
Dear All, I am interested in doing acoustic simulation of horn, my input will be 2-d horn geometry , input acoustic pressure, frequency. and now I am interested in finding out the sound pressure...
View ArticleHow to know all the variables existing in MPH file via Matlab
Hi, I have a basic problem which may be simple for most users. I just want to do some further postprocessing for MPH results via Matlab. But, I don't know how to know all the variables existing in MPH...
View ArticleHow to set conditions for the internal boundaries?
How to set conditions for the internal boundaries?
View Articlemode analysis for hollow core photonic crystal fiber
Hi, Is there anyone has experience doing mode analysis for the hollow core photoni crystal fiber? I tried to build the model but cannot find the confined mode although I am pretty sure the parameters I...
View Articlemislabeling of periodic boundary conditions with changing geometry
Hi Problem: I have a unit cell of a periodic lattice structure. The unit cell has Floquet periodic boundary conditions [PBC], and I am doing a parametric sweep of the geometry features of the basis...
View ArticlePersonalized heat source
Good morning everybody, I am a novice in use of COMSOL, I want to simulate the propagation of heat through a material, sounds easy but my heat source is a surface defined by a matrix (every pixel is a...
View ArticleHow to include anisotropy in the solid mechanics module
I am working on a model, simulating an anisotropic material that shrinks and warps due to changes in temperature. I wonder how can I include an initial temperature (thermal strain) in the structural...
View Articlesimulation of the microgripper
i am doing the simulation of microgripper. In which i can vary the frequency and voltage but the results get same in every time.
View ArticleHeat removal boundary condition
I have to simulate induction heating phenomena of a cylinder in 2D with a Cooling arrangement inside the same cube that ( cooling tube arrangement are not visible in 2D ) through a coil so the heat...
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