Piezoresistive Coefficent of n-type Silicon- sigma0 function of N or nd?
The below post is related to an archived discussionHi!I am trying to simulate resistivity change in n-type doped Si given some mechanical stress. My Comsol results for resistivity change are 10E-5...
View ArticleElectric Current with square wave
First of all, thank you for taking your time to read this post. Hopefully, you guys can give me some pointer. I have been using the classkit COMSOL 5.5 while following closely with the example...
View ArticleCreation of solar irradiation profile on solar trough receiver surface
Intensity on the receiver tuber is computed by ray tracing study in gemetrical optics. Can you please help me with its distribution presentation? I would like to use the profile for heat transfer model...
View ArticlePlease Help me! Feature: Time-Dependent Solver 1 (sol1/t1) Undefined material...
Feature: Time-Dependent Solver 1 (sol1/t1) Undefined material property 'mur' required by Ampère's Law 1.NOTE: I Checked all material properties are defined properly. And Mur stands for
View ArticleDefining charge on a sphere
Hello everyone! I am a new user to COMSOL. Can anyone please help me with the given problem? I want to define a sphere that is positively charged. I am not quite sure how to do this in a 3D...
View ArticleMaterial Sweep While Changing Study Step
Hello!I'm trying to calculate electric heat with three different cases and, using these results, expect temperature rise. I want to use three Electric Current physics with Stationary solver and Heat...
View ArticleSimulation of Surface Plasmon Polaritons on Kretschmann Configuration
Hi,When simulating SPPs on Comsol so that I can calculate the magnetic reflected field on the plasmon ressonance to determine the Reflectance x Incident angle at the surface (prism/material/air), which...
View ArticleElectric Field Strength Diagram
Hello, I'm still very inexperienced using Comsol. I wanted to visualize the distribution of the electric field between oppositely charged electrodes to know its effect on human blood RBCs during...
View ArticleHow to apply strain to a 3D block in one direction in COMSOL?
I have a 3D block of an elastic material. I stretch it from one surface in one direction and for example I stretch it for 5 mm in Y direction. so my input load is either external stretch or external...
View ArticlePlot result in a cylindrical coordinate
Hello, I want to visualize the stress tensor in the cylindrical coordinate. Currently, I have the output from a 3D solid mechanical model. The expression I choose is solid.sx, solid.sy, solid.sz and...
View Articleelectric field distribution with respect to arc length plot
Hello, I'm still very inexperienced using Comsol. I wanted to plot the relationship between the arc length and the electric field distribution as shown in the figure below. Unfortunately, I am not...
View ArticleIntegrate 2D Axisymmetric and 3D Components
I have 2 separate .mph files that I would like to integrate. One is a thermal analysis on a 3d model and the other is a thermal analysis and magnetic fields analysis on a 2d axisymmetric model. What is...
View ArticleFeedback control during time-dependent simulation
Hello, I would be curious to hear if it is possible to somehow implement feedback in Comsol, particularly in time-dependent/transient pressure acoustics simulations. What that concretely means: I would...
View ArticleCurrent pulse
Hi, I am aiming to model a stimulating electrode in a biological medium. My simulation works for a single value of stimulating current but I would like to investigate a single transient pulse or train...
View ArticleCoil Node: Using different expressions for Coil current (pre-computation)
Dear all,I'm currently looking for a solution for the problem described in the title. The idea is, that a specific coil geometry (e.g. nTurns, nLayers, conductor radius, ...) leads to different coil...
View ArticleHeat transfer in solids with phase transition
Hello,I'm building a heat transfer model with two contacting domains: a copper cube and ice rod. The copper cube is a heat source and one end of the ice rod is contacting the cube and the temperature...
View ArticleUsing a previous solution as an initial condition, with a different geometry
I’m trying to model how a crater in ice viscously relaxes. I expect for the floor of the crater to rise and velocities to be less than a micron/yr. However, this behavior is not seen because the entire...
View ArticleAnisotropy of Silicon in Solid Mechanics
Hello, I am simulating piezoelectric stack of AlN that is sandwiched between two electrodes and the sandwich sits on a Si substrate. I remember doing this in version 4 and now I am using v5.5 but for...
View ArticleChladni Plate Remodelling
I'm recreating the Chladni Plate with more shape as my study, unfortunately I got problem when I'm creating the model, may I know why I can't make it properly. I can't make another shape. Here is the...
View ArticleSimple Mesh Problem
Hello All, I am having a very very simple meshing problem. I have rectangular geometries stacked up with different dimensions. The cross section looks like a staircase. I would like to mesh this in...
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