Metal melting simulation.
Hi everyone, I'm trying to simulate the melting of metal (Cu) using the Heat transfer module. I have already done phase changes from solid to liquid (melting point) like as Continuous Casting model....
View Article3D induction heating meodelling
Hello, I'm a beginner on Comsol and I'm trying to produce a 3d induction heating model. I did a 2d previously and I was able to run it without problems. But on the 3d I have the following error message...
View ArticleHow to implement definite integral on Boundary integration variables
Dear All, I am trying to integrate the nr unit vector along a sphere on 2D axial symmetric model. My aim is to find force acting on the sphere and when I type to the boundary integration variable,...
View ArticleNeed help setting up a model
I'm having a hard time figuring out how I would do this: I need to model a static load being applied to a deep foundation (steel pile, concrete pile, etc.) in 3D, but I'm having some problems. For...
View ArticleHow to fix the error "Out of memory in stationary solver."
hi ! I'm Lam, I construct a model.when i play function 'compute' in STUDY and see error "Out of memory in stationary solver." please show me how to fix it. thank you for comment.
View ArticleInstability using PDE module
Hi all, As beginner with COMSOL I'm having a problem with the stability of my COMSOL results. In the PDE module I try to solve four coupled differential equations regarding a MHD flow in an annular...
View Articlewhy do I get such figures?
Hi Friends, I have a 1D model to figure out three dependent variables of gas discharge using the PDEs module. However, it turn out to be a series of linear curves, which does not conform to the actual...
View Article4.3 to 4.2a backwards compatibility??
Hi, i'm just back from the Boston conference and had carried out a bit of work on a model in 4.3 at the demo stations. I'm using 4.2a on my machine and the model won't open, just getting the message;...
View ArticleVacuum properties
Hi, While doing eigenfrequency analysis on rf module of a cylinder, if the geometry consists of only a cylinder, the cylinder is assumed to be standing is vacuum. Can I change the surrounding medium to...
View Articleoutlet as inlet (interpolation function)
Good morning, I'm trying simulare a laminar flow and the transport of a diluted specie (c) in a 3D model. I would like create a loop in which the concentration at the outlet at the previous step became...
View ArticleOldroyd-B model fails to converge
Hello there, I'm working on a simulation of viscoelastic flows in a square duct. Since our measurements are performed in the center plane of the channel, we can basically consider that a 2-dimensional...
View Articleinverse initializing model
Hi my Dear Friends, I have a constant amount of liquid between a sphere and a flat plate in axisymmetric geometry. I want to insert some specific volume of liquid in comsol and find the height that it...
View Articlewrong number of function arguments
Hello, I keep getting the same error for my analytical function "Wrong number of function arguments Number of arguments expected: 3" But as far as I can tell, I have defined 3 arguments in my...
View ArticleHelp for Modal analysis of a nonuniform beam using COMSOL
Hello,everyone. I want to do modal analysis of composite blade using COMSOL. The blade will be represented as a series of beam element. My question is how to use COMSOL to build nonuniform beam,...
View ArticleCan someone help me understand this error?
I need help understanding the cause of the following error: "Failed to compute elastoplastic strain variables" I have received this error numerous times in a few different structural models where I am...
View ArticleMass transfer in membrane
I have succesfully developed a 2d model for the simulation of diffusion+reaction through a membrane. Now I want to do the same thing with a 3d model. I developed a model but it doesn't work and I...
View ArticleHow to fix the error "Attempt to evaluate negative power of zero"
Hello all I construct a model 2D tubular Solid Oxide Fuel Cell, while simulation showing error under velocity and pressure section "Attempt to evaluate negative power of zero" so how to fix this error....
View ArticleError in Sweep - Invalid Property Value
Hello community, I have a problem with a file that was running fine without parametric sweep. I tried to implement the parameter sweep, but it seems I run into troubles. Here is the error message :...
View ArticleTo find leakage inductance of a toroidal transformer
Hello, I am trying to find the leakage inductance of toroidal transformer using a 3D model. I made a 3D model using the equivalent Copper conductors as a single winding (not each windings...
View ArticleElectric field between two electrodes
Hi, First of all let me tell you that I am a new user of comsol. Indeed, after some research, I trully believe in the significant impact that this software might have on my work. However, I am a...
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