Large Deformation Analysis- Convergence Problem
Hi All, I encounter a convergence problem in my COMSOL model. It is greatly appreciated if someone help me to solve this problem. As you can see in the attached model, I am modelling a cartilage using...
View ArticleUndefined value found
Dear COMSOL Community I have a question regarding the example of the Vanadium Redox Flow Battery (www.comsol.com/showroom/documentation/model/14153/). I have tried to simulate it but I get following...
View ArticleLinear induction motor with AC/DC Module
I'm trying to simulate a linear induction motor in comsol using the Magnetic fields physics in the AC DC Module and I am facing a couple of issues. 1. BH_Cuves and non linear solver: I would like to...
View Article2-Step Full Field followed Scattered Field Simulation
I am trying to solve for the scattered electric field from a gold nanoparticle on a semiconducting substrate, using a 2-step process identical to the example file "Scatterer on Substrate." When solving...
View ArticleGeometry variation within Time-Dependent solving.
Hello, I was wondering if it's possible to change geometry according to time ( via internal or external function(MatLab)) ? ie: Making a block depth function of time.
View ArticleWork on COMSOL through MATLAB?
Hi, I would like to run COMSOL through MATLAB but don't understand how? For example when I have saved a COMSOL simulation as M-file and tries to open it in MATLAB it won't open and I am not sure how to...
View ArticleRecoverable error in residual, but solver could not recover.
Recoverable error in residual, but solver could not recover. What is the meaning of this error ?
View ArticleGlobal variables to evaluate in Parametric Sweep
Does anyone know the syntax to evaluate the velocity at a specific point? I'm running a parametric sweep of my model and in my output for the "Globar variables to evaluate" portion I want to store the...
View Article"Internal error in boundary respecting." and "Out of memory during assembly."
Dear All I have two errors in my microfluidic models about "Internal error in boundary respecting." and "Out of memory during assembly.". At first I tried to simulate the flow of the overall 3D...
View ArticleSolving a system of coupled PDE
Hi, I try to solve a system of coupled PDE with Comsol. Unfortunately, I have problems to choose a suitable solver. Details of my question and a model file are attached. I would be very grateful for...
View Articleout of memory during LU factorization ?
I use comsol multiphysics 4.2 to solve a model on my computer(with 2GB RAM), I get the error "out of memory during LU factorization", but when I put the same model into another computer(the same cpu,...
View ArticleIncorporating Lagrange Multipliers
Hello again, Thanks to the help of those on the forum I was able to incorporate weak constraints to get accurate flux calculations in my diffusion models. However, I am trying to understand how exactly...
View ArticleBending Loss Calculation Procedure For Photonic Crystal Fiber
Hi, I am a new user of Comsol Multiphysics version 4.2. My undergrad thesis topic given by my supervisor is about bending loss calculation using comsol.please help me with the guideline how can i make...
View ArticleSolving a 3rd order polynomial
Good day, When using the Distributed Algebraic Equation physics, is there a way to solve a higher order polynomial for a variable and be able to acquire all of its roots/solutions simultaneously and be...
View ArticleCoupling 1D Pipeflow to 2D axisymmetric Porous Media
I am working on coupling 1D pipeflow to 2D axisymmetric porous media. The coupling is peformed by averaging the 2D boundary to the 1D point and integrating the 1D point to the 2D boundary. The coupling...
View ArticleApply load to a deformed mesh/geometry
I have applied load to a hypeelastic material model for a stationary structural analysis and I have gained the deformed result. I am trying to apply the second load to the deformed boundary on the...
View ArticleSuperfilling only inside the trench
I need to modify the COMSOL 4.3 "Superfilling" verification model (provided in the Electrodeposition examples), in such a way as to consider only the inside walls (two vertical and one horizontal in...
View ArticleTime solver dynamics - advice
I'm in "currents and voltages" applying a current density pulse within a copper short going through the glass dielectric of a spherical copper capacitor. This is a biological equivalent, there is no...
View ArticleLarge Deformation Analysis- Convergence Problem
Hi All, I encounter a convergence problem in my COMSOL model. It is greatly appreciated if someone help me to solve this problem. As you can see in the attached model, I am modelling a cartilage using...
View ArticleUndefined value found
Dear COMSOL Community I have a question regarding the example of the Vanadium Redox Flow Battery (www.comsol.com/showroom/documentation/model/14153/). I have tried to simulate it but I get following...
View Article