Creat 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 ArticleProblems with postprocessing in particle tracing
I ran some simulations in the 4.2 version of COMSOL using fluids mechanics the particle tracing postprocessing module. When we updated to the 4.3a version, we began having problems visualizing the...
View ArticleComsol With matlab: non monotonous interpolation grid
Hello all, Im using Comsol 4.3 with matlab. I use the transient time solver. Anytime I set the solver for short time stepping < 1e-4 seconds the calculation crashes and I get the following error: "...
View ArticleElectrostatic Actuation with COMSOL Multiphysics
Hi, I am looking for this webinar from 2011 Electrostatic Actuation with COMSOL Multiphysics promoted by IEEE / comsol (spectrum.ieee.org/webinar/1927822) Any idea where I can find a copy? Thanks for help
View ArticleCan you import data into Comsol 3.5?
Hi, I'd like to import data into Comsol 3.5, for example, the refractive index of a material. The data are in such a format: wavelength(nm) , n 300 , 2.5 301 , 2.49 302 , 2.48 303 , 2.47 etc. I'd like...
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...
View ArticleOne way multiphysics coupling within a transient simulation
Hello Fellow Users, I am solving two physics (fluid flow & species transport) in a transient simulation. The fluid flow is not affected by the concentration distribution. As of now, i have...
View Articlehow to measure max and min electric field of certain surface area ?
I simulated the insulation with a void , ( rectangular and circle) in 2D. any way I want measure the max and min of electric field on the surface of the circle (certain surface) then how can I do THIS?...
View ArticleHow stratify a topographic surface?
Hi, I have to layered a topographic model construct from an XYZ file . I import the file as an interpolation function and then construct the parametric surface. Besides I construct a block (block1) of...
View ArticlePlot an expression along a specific coordinate system
Hi I defined a cylindrical system (r,phi,a) and I'd like to get the results along one of these specific coordinates. Since all the direct results expressions are defined in cartesian coordinates...
View ArticleHow to set properties for material.
I simulated the insulator model in 2D-axial symmetric in AC/DC Module. i use com sol 4.3. i have some doubts related to that. How to set (or) apply a switch threshold value for particular (my model)...
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