GEOMETRY
How to modify the block geometry, for example, by transforming the square face into round face?
View ArticleCap Faces of complex geometry
Hello everyone! I´m sorry to bother you guys, but I simply can`t figure out how to solve two problems in COMSOL (4.4) and hope anyone could help. I was given a ~20 MB step. geometry consisting 3...
View Articlephotothermal or laser heating simulation in Comsol
Hi, I am new to Comsol. I am trying to simulate the temperature rising of the plasmonic structure during the laser illumination. Assuming the Electromagnetic wave plus the heat transfer will do the...
View ArticleERROR: Complex number encountered in real expression(when calculate the DEP...
Hello everyone: I use Particle tracing module for fluid to calculate the DEP force exerted on the nano-sized particles. When calculate the DEP I encountered a problem as follows: Complex number...
View ArticleOscillating the boundary wall in sine waveform
Hello, I am trying to simulate laminar fluid flow in sawtooth profile boundary, My questions are, How to oscillate the boundary in sine wave form in time dependent?? The moving wall velocity formula is...
View ArticleLoad distribution
Hi guy, currently I doing the load distribution on the piezoelectric material. May I know can I use the 3D model result -> 3D Plot group -> Surface ->Piezoelectric device (solid Mechanics)...
View ArticleMoving mesh simulation
Hi I am trying to do a simulation of railgun using comsol. Railgun is like an EM launcher setup where an object(armature) is accelerated between two parallel conductors by EM force. There is a tutorial...
View ArticleHow to get coefficient names?
Hi all, I am new in COMSOL. I set a "Coefficient Form PDE (c)" and I need the name of the absorption coefficient of the PDE, in order to use it in an expression. I tried with "c.a11", but this variable...
View Article3D symmetry
Hello, I am dealing with a 3D geometry in which I have a cone with a hexagonal base. I cut it into 6 axisymmetric equilateral triangles. I wish to give symmetry boundary conditions on the sides of the...
View ArticleMagnetic Insulation not applying correctly
Hi everyone, I'm working on a figure-8 coil model that is widely used in medical treatment for neural diseases. I have successfully modeled the kind of coil I wanted and created a boundary volume...
View ArticleDiffusion and absorption simulation
Hello I want to calculate the rate of absorption and diffusion of water from humid air into a solid material. However, I can only find information in COMSOL about diffusion spreading inside one...
View ArticleMesh distribution and piezoelectric device antisymmetry Function
Hi guy, May I know the function of mesh -> Free tetrahadral -> distribution? If I applied a compression force on an object surface, is it function to determine the distribution of the applied...
View ArticleAnalysis of stress in fluid structure interface module---
Hello I have a doubt. I was working in Fluid structure interface module to analyze the drug delivery system. I have computed the flow analysis and I need to analyze the structure for its stress. But I...
View ArticleMEMS - Micro bridge heating - Cant see temperature difference
Hi, i'm trying to simulate a micro bridge heated by laser. The bridge seems to be moving but when i when i'm viewing the temperature differences, all the bridge seems to be at the same temperature......
View Articleadd mechanical damping, not convergence
When I compute a piezoelectric transducer in a water domain, the solution works well and convergence. However, when I add mechanical damping to the piezoelectric material and keep others all the same,...
View ArticleSilicon parameters
Hi.. I am working on silicon simulation in FDTD software. I have to build a waveguide for THz waves (0.1 - 1.2 THz) with silicon od carrier concentration = 10^18 cm^-3. What is the static permittivity...
View ArticleCompute study for only the 2D cross section of a 3D geometry?
Hi all, I have made a 3D model in COMSOL vs 5.2a of a microfluidics channel and am attempting to model the DEP response of cells in the channel to the presence of an electric field created by...
View Article2D results as initial conditions to a 3D model
Hi, I'm doing a simulation of moisture and heat distribution on a soil profile. On the first step I've made a 2D simulation of my soil that is a rectangle. Now I have a heat exchanger buried in my soil...
View ArticleMEMS Stresses and Strains
Hello, I am relatively new to COMSOL and am trying to model a simple deformation of a MEMS bilayer. My geometry consists of a polyimide support (micro-meter dimensions) and a gold layer on top. I am...
View ArticleReusing a deformed geometry for a new study
My goal is to model a loading on a wire that has some slack. So, ideally, the wire should deform under some predefined displacement initial condition and then be subjected to a load. I am trying to...
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