Java runtime error occured when I computing model and COMSOL was shut down.
I am using COMSOL Multiphysics 4.3b.There was no problem when I compute model with respect to 'heat transfer solid' only.But when I compute model with respect to 'heat transfer solid' and 'solid...
View ArticleHow to deal with geometry overlapping
Hello, I have a geometry model which is continuously transposed cable, so all the strands are tranposed connected, first I draw rectangular and a polygon to define its spine, then I use sweep to model...
View ArticleBoundary conditions for porous media in dam break case !
I have a dam break simulation created on comsol as seen in the following video https://youtu.be/02tGVX0PRGoThis dam break is simulated using (Two phase flow - laminar - phase field) Now I want to place...
View ArticleSimple thermistor example
Hello,I am trying to test an example of using a bisection method in matlab with COMSOL. I've attached a paper that I'm following.I need to 1) get a simple thermisor Comsol programme 2) run the...
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Post processing visualization takes a lot of time than the study solution...
I did a 2D Axisymmetric pressure acoustics frequency domain analysis.The solution had completed less than a minute.I wanted to visualize the sound pressure leve on a cut plane from the 3D dataset (made...
View ArticleMagneto-elastic modes in magnetic nano-structures after pulse laser excitation.
Dear all Group members, I have moved to comsol for one of my problems which require multiphyics but I have no idea where to start as I am a novice to this Software. Probem description is below: I...
View ArticleSurface reaction
Hello, I'm simulating this case: a channel in which an exothermic reaction takes place on the surfaces. I'm using " surface reaction " and trasport of diluted species for the mass transfer. I'm new in...
View ArticleComsol crashes only when computing "solid mechanics"
I have a problem using COMSOL Multiphysics.When I computing a "heat transfer in solid " model, there is no problem.However, if I computing a "solid mechanics" model, the COMSOL crashes and "hs_err"...
View ArticleFinding the mode shapes at the outlet
Hello,I am currently modelling a rectangular duct with the acoustics module. I am feeding various modeshapes e.g (1,0) (1,1) etc in the inlet via the port functionality and would ideally like to find...
View ArticleOverhead Power Lines
Hello everyone,I have the next problem that I do not know how to solve, I have a cable made of steel and aluminum wires and I would like to observe the heat distribution of this cable if it is traveled...
View ArticleHow to do a parameter sweep of a 2D axisymmetric resonator with EWFD and...
Hello,I have a 2d axisymmetric model that is just a rectangular ring resonator waveguide.I would like to do a paremeter sweep over waveguide geometry and get the effective index of the TE00 or TM00...
View ArticleCluster computing on two desktop computers running Windows 10
Hi, I have been runing some large-model simulations and would like to utilise serval computers I have in my office, however we don't have a cluster server. I have Comsol installed on every computer. I...
View ArticleChemical reaction
HelloHow to model a reaction where solid converts into another solid and liquid using reaction engineering physics? Reaction engineering thermodynamic system wizard contains only liquid and gas but no...
View ArticleConvert a PDE to the Weak Form
Hi,I have a 2D geometry and time-dependent study with 1D heat transfer in solids, 2D chemical reaction and 2D gas diffusion physics, where I'm using the coefficient form PDEs to model the chemical...
View ArticleVersion Control System & Application Builder
Is there a way to integrate the COMSOL application builder with a version control system to make larger code projects easier maintainable (e.g. GIT or others)?If there is no such integeration, what is...
View ArticlePiecewise Function is giving Unknown variable error.
I am using comsol 5.4. When I define a piecewise function and use it to write expression it is giving an "unknown variable error". (see images). What is going wrong here??(units are all correct)
View ArticleThere is a practical question about the solid-liquid interface and I don't...
Inject a fixed amount of water into an irregular identified container, and want to determine the distribution of water in the container and the position of the liquid surface under the effect of...
View ArticleObject disappearing due to high aspect ratio
Hello everybody, I have been using joule heat module to simulate the quench propagation in 60 cm long superconducting thin film. The thin film with the structure of Au/YBCO/sapphire is made of a 100 nm...
View ArticleTemperature profile around a plasmonic substrate
I am trying to simulate the temperature profile around a plasmonic gold plate in 2D surrounded by water. I am using 2 modules ewfd and ht in solids and fluids. The input field is getting totally...
View ArticleWall Problem in 2Phase Euler-Euler Simulation
Hello,I have a problem with a turbulent 2Phase-flow (bubbles in liquid) Euler-Euler simulation for a vessel which contains rectangular internals. I specified the interface between fluid and internals...
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