MATLAB Livelink
Hi I am running a MATLAB script from COMSOL with MATLAB, and it eats up all memory in C drive. so it never returns any result before it crashes. Any idea why this happen? something wrong with the...
View ArticleHow to reduce numerical diffusion problem when simulating micromixing
Hello Comsol friends, I have a short question - my simulations of micromixing exhibit rather fast mixin compared to the measured results, especially at high Peclet numbers (~ order of Pe~ 10 000). I've...
View ArticleSimulating gradient of a magnetic field, induced by 1 turn copper wire
Hello, I come from Germany and I study Biomedical Engineering. I am very new to COMSOL and using right now a 14 day trial version on my home pc. I was looking last days through several models of...
View Articlehow to track the values of the user defined variables
I am working on simulation of the ignition of composite materials. And I want to track the values of the variables I defined in the simulation. Is there any way I can do that ?
View Articlecluster computing mpi
Hello, I am trying to run my models from comsol on our University's super computer, and having difficulty with the $PBS_NODEFILE command. Can the PBS_NODEFILE also be used to run generic MPI programs?...
View Articlecoil winding direction
How do I determine the direction of the magnetic induction in multi turn coils. Thank.
View ArticleHeat Transfer in Soils
Hi, I am a comsol user and I want to have a 2d axisymmetric model. In my model, I have a soil sample that I put a steel bar in the soil. I want to heat the steel bar with a constant temperature 500(k)...
View ArticleMie scattering in 4.3
Hello, I have already seen some discussion about mid scattering of a gold nanosphere. But I the discussions I have consulted, no one has yet implemented a mie scattering program in Comsol 4.2 or 4.3...
View ArticleInaccuracies in the formulas of the Materials Browser
Let's work with Structural Mechanics Module> Thermal stress. The temperature at which there is no change in size of your model, called Tref. L (T) - the size of your model at a temperature T. To...
View ArticleUsing the Optimization Module for geometry examination
Geometry optiization 4.3a Simple 1D sold state battery problem (in COMSOL) Done with assistance from COMSOL M = length of anode 320 nm L = length of solid electrolyte 1500 nm objective function =...
View ArticleModeling a Dielectric as a Real Capacitor
Hello everyone, I am having trouble modeling something. I would like to look at the conduction/conductance/resistivity of a insulating/conductive composite. It could be thought to be like a...
View Articleerror:1038 File created by a later version of COMSOL
Hi I work with version 3.5a. I want to open a file but i encourage an error:1038 File created by a later version of COMSOL How can i open it, i think it is with version 3.5 Thanks in advance
View ArticleSimulating a Magneto-caloric effect in Comsol
I have a problem in which i have a permanent magnet. In regards to theory of Magneto-caloric effect, if i pass the magnetic field to the gadolinium(rare earth, lanthanide group in periodic table),...
View ArticleIntegration of MATLAB functions with more than one variable
Hi, I want to realize an integration in COMSOL 4.3a using self-written MATLAB functions. If I use a test function with one input and one output argument everything works as expected (plotting function,...
View Articleshear wave propagation simulation
Hi, I am trying to simulate a shear wave propagation in a homogeneous, isotropic, and linearly elastic material. I constructed a cube for simulation and applied fixed boundary condition to one side of...
View Articlehow to simulate the bending of two metal cylinders when they have different...
Hi, guys. Recently I want to simulate the interaction between two cylinders which are made of metal when they have different voltages on them. I think it is in the emi model. But I can't done it...
View Articleexporting 3D simulation's output data from model 1 and importing as input...
Hi, I am trying to simulate on micro-mixer with 3D structure. I am having trouble with importing the model 1 output data to the model 2 input profile correctly. I tried using the interpolation function...
View ArticleInductively coupled plasma-High vacuum-Laminar flow-Free Molecular Flow-times...
hello! *** first question: I try to simulate the device using the PLASMA MODULE (inductively coupled plasma) and LAMINAR FLOW in a vacuum (10 millitorr). The problem is that when I run the solver, had...
View ArticleI want to simulate the deformation of two cylinders when they have different...
Hi, guys, I want to simulate the deformation of two cylinders when they have different potential. Is the model right? In the calucation, I find the model has difficulties to converge.
View ArticleUnknown function or operator
I defined an integration operator intop2 under Model 1 --> Definitions. But when I try to plot the results under Results --> 1 D Plot Group 1 --> Global 4, it says "Unknown function or...
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