Java 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 ArticleBasic GaN TFT Simulation, Mesh error
Hi everyone, I am new in Comsol, so probably my issue will sound funny to you, however I could not solve that problem and want your help. I want to simulate a basic thin film transistor (TFT) in 3D in...
View ArticleJoule Heating and Thermal Expansion
Hello, I'm trying to solve the problem of Joule Heating and Thermal Expansion by applying current via terminal. Somehow I'm getting the following error."Failed to find a solution. Singular matrix....
View ArticleOne boundary with two boundary conditions (Neumann and Dirichlet)
Please help me to understand about this issue. I have a system of two PDE equations with two variables (u1, u2) need to be solved in General Form. On a boundary 1, for example, I set up a Neumann...
View Articlebaffled duct - PML 3D PROBLEM
Hello every one, I’d like to excite a cylindrical waveguide (rigid in one face and flanged in the other one) with a monopole located in M(x,y,z) and compute the pressure inside the duct. Also, compute...
View ArticleLight Propagation in Tissue
i just want to simulate the propagation of monochromatic light (800nm) in a 3 Layer tissue model 3D. Does anyone know a working Comsol solution? Problem: to many elements with this wavelength. Setup: 3...
View ArticleImplementing a two-temperature-model (electronic/lattice) for fast...
Hi I am trying to solve a similar problem and I am using PDE (c) interface. Anyway, how did you try to solve it? Thanks!
View ArticleUsing only part of saved solution Comsol v4.4
Hi all, I am studying the acoustic response of a spherical shell. I am doing an acoustic-solid interaction study (frequency domain). I would like to study the acoustic field generated by an oscillating...
View ArticleTemperature echelon imposed for heat conduction
Hi all, I have a temperature condition imposed on space between [y1; y2]: T= constant ; and all others are adiabatic boundaries for the heat conduction problem. Contours of total heat flux magnitude...
View ArticleHeat Flow - Stationary vs Time Dependent study
Good Evening, The mph files for both are added below. My model is shown in attachment (3). It consists of a copper strip on a piece of GaAs which rests on a heat sink made of copper. A 20 V Voltage...
View ArticleMesh memory for large model in parallel computing
Hello everyone, I have a problem with solving a large model in parallel computing with comsol. I have a distributed-parallel processing system with 6 nodes, each has 16 cores. And i have 128 Gb of...
View Articleworkstation for comsol
Hello, i plan on buying a new workstation for COMSOL 5.0. Area of research would be mostly acoustics in general with a wide range of different studies and up to sth like 10M DOFs. Its only possible to...
View Articlecalculating bulk temperature and nusslet number
Hi, If we have a vertical slit that a flow is coming in from the bottom and the walls are heated .how can we calculate the bulk temperture in the slit in comsol? more spesipically if we want to...
View ArticleModelling laser ablation in COMSOL
Hi, I have a fairly simple question about COMSOL. I have made a model in which a block is heated by a pulsing laser heat source. I am using an iterative approach to solve it by solving for each pulse...
View ArticleTransport of diluted species and electrostatics
Dear Community, I am trying to combine the physics of the poisson equation (electrostatics) with the nernst-planck (transport of diluted species) in Comsol 4.1 for like 6 weeks now, and all I get is...
View ArticleHeat dissipation in a plasmonic nanostructure using pulsed laser
I am trying to generate a model where I can look at the heat dissipation in a plasmonic structure when irradiated by a ns pulsed laser. I have managed to make a model where I can solve the emf...
View ArticleRestore a Model to a Previously Simulated Version After Reopening
Hello, I have a question regarding restoring a Comsol simulation to a previous version. I successfully ran a Comsol simulation, but I must have made a change to the conditions and then saved it. When I...
View ArticleCurrent Source and violation of Maxwell-Ampère’s law
Hi, I have setup a model using both Electric Currents and distributed ODE and PDE interfaces using a simple 2D square geometry. One boundary of the geometry is set as ground and another used to apply...
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Advanced photonic bandgap (triangular lattice)
Hello, I'm trying to expand the photonic bandgap model (www.comsol.com/model/bandgap-a...ysis-of-a-photonic-crystal-798) to a slightly different structure, but since I'm new to photonic crystals, I'm...
View ArticleCurrent Source and Violation of Current Conservation
Hi I'm using the electric currents interface. My model uses the "current source" feature and the solution COMSOL gives clearly violates current conservation. Has anyone else experienced this? And does...
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