COMSOL Design of Membrane Deformation using FSI
Hello! We are currently doing research that models deformation of a membrane, and we are using COMSOL Microfluidics 5.2a. We want to know the feasibility of our design we present, as well as feedback...
View ArticleEddy current simulation not converging when velocity increases
My simulation simulates an array of magnets moving over an aluminum plate at a fixed height and a given velocity, and while it computes and yields results similar to those of a numerical analysis, it...
View ArticleHow to chose right conditions
Hello, i have been trying do that this couple of months and i cant solve this problem by my own. I dont know , how and which conditions i need to choose to get all worked up. My main topic is to...
View ArticleThe compression simulation, and the material "exploded" during simulation, why?
Hello everyone, I am just using Comsol to simulate the process of compressing PMMA with the indented shape. I followed the similar example from the Comsol examples, and set the PMMA as a viscoelastic...
View ArticleOut of memory during out-of-core LU factorization
Hi I have a CFD model with 1056,2892 degrees of freedom and a server with 128GB memory. I assume this memory size is enough for computing the matrix I have now. But I keep getting a error: Failed to...
View ArticleUndefined value found
Hi, i can solve my semiconductor model with a relatively coarse mesh. However the found solution is not good enough. It shows some differences to a reference (PC1D) semiconductor model. That is why i...
View ArticleParameter estimation
Hello, I want to determine one parameter k1, which is used over the entire domain. However, objective function values should be compared only at a boundary. According to the Optimization user manual, I...
View ArticleDamped Eigen frequency Analysis
Hei, I am working on calculating Q factor from eigenfrequecny analysis using structural mechanics. I know that Q factor= abs(imag)/2*abs(real) but my problem is when I add damping in the form of...
View ArticleAcoustics - Large models convergence
Hi, I'm driving crazy about this subject. I think don't know many things about this model, but regardless how mesh, solver configuration (multigrid, iterative, direct, etc.) or any other thing I change...
View ArticleSheet metal bending - spring back effect
Hi I am trying to make an elastoplastic 2D simulation of sheet metal bending to observe different spring back in various materials. I want to use V-bending proccess since we have a fixture to do the...
View ArticleAnalysis of mixed convection flows within a square cavity
Hi , I am new to the topic of solving mixed convection problems in COMSOL multiphysics. I want to validate Fig. 8 of the paper(attached). Stream function and temperature contours for uniform bottom...
View ArticleLonger simulation study
Hello everyone, I'm facing an usual problem with a comsol time dependent simulation study. In the study settings, upon changing the upper limit of the time range by a decade, the simulation doesn't...
View ArticleHow to resolve warnings about relative error in comsol?
I have a model that consists of two squares that are one on the other separated by 10 mm. The bottom square measures 60 mm, is pine wood with tangential behavior (with a poisson coefficient of 0.3) and...
View ArticleSchiller Neuman SLIP Velocity Mixture Model V3.5a
Hi folks. I have trying to use the Schiller Neuman Slip velocity model for a few days but no success. I am successful in using the Hadamard-Rybczynski but I need to use the Schiller Model for...
View ArticleJava Runtime Environment error
Getting following error, A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000003da3efbc6c, pid=6909, tid=46912497239488 # # JRE version: 6.0_20-b02 # Java VM:...
View Articlehow to run a time dependent state from the solution of a stationary state?
hi peeps so instead of putting 'stationary' and 'time dependent' in a row, I run a 'stationary' state in the first place, when it finishes, I add a 'time dependent' (taking solution from 'stationary'...
View ArticleIntegrate one Study in another
I am trying to solve a study with a fluid flow problem and an electrochemistry problem. Both studies can be solved by themselves but if I want to solve them together or use the Velocity field of the...
View ArticleSimulation of composite laminates
Hi all, Do you have any idea of modeling (simulation) of laminates , e.g. bi-layer composites having layers with different elastic modulus avoiding the so called 'free edge effect' (a stress...
View Articlesolving two partial differential equations nonlinear in comsol?
Hi, I want to solve two pde nonlinear with two variables (please find in the attachment file) with the constants. For solve, i tried to use the heat equation and PDE (c) in two step: step 1: solve...
View Articleparametric sweep study depending on a parametric sweep study
Hello, I am having a big issue here in my simulation. I have two studies: Study 1: I did a parametric sweep stationary study with a first physics model (laminar flow) for different geometries with only...
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