Cauchy 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 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 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 ArticleCreat geometry
Hi everybody, I would like to know how to create a serpentine heat exchanger inside a block of material (2 D and 3D)? Thanks
View ArticleModeling 3D Induction heating with Frequency-Stationary simulation
Hi, I am trying to simulate induction heating due to a spiral inductor with different core materials. I want to perform a Frequency-Stationary analysis. I have the following problems: 1. The usual...
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...
View ArticleLocal derivatives on an edge
Hello Community, I'm building a 3D model in which edges are randomly oriented. On these edges I'm trying to implement a weak formulation of a pde but I can't figure out how to compute the derivatives...
View ArticleERROR: FAILED TO EVALUATE VARIABLE JACOBIAN, Variable: Freq
Hi, I am getting the following error: Failed to evaluate variable Jacobian. - Variable: freq - Geometry: 1 - Domain: 1 2 3 - Feature: Stationary Solver 2 (sol2/s2); - Error: Failed to evaluate variable...
View ArticleGeometry visualization
Hi all, I have a comlex geometry in 3D, which is not suitable for simplification. I have to model a wire of a coil together witz its insulation. The wire has a dimension of some mm while the insulation...
View Articlecalculating fundamental mode index by wavelength sweep (PCF)
I am simulating photonic crystal fibre (PCF) structures in comsol 3.5a and I want to calculate the solutions (effective index) by sweeping the operating wavelength. is anyone here know how to do that....
View ArticleDefine Young's Modulus as a piecewise function dependent on strain
I'd like to define a new material with a nonlinear Young's modulus as a piecewise function dependent on strain. I've defined the piecewise function under Global Definitions, but I'm confused as to what...
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 ArticleDefromed Mesh
Hi everyone. I designed a 2D rectangular object with a deformed mesh composed by a set of points interpolated between them in order to realize lines. How can I "move" such a structure in COMSOL 3.5a (I...
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