Variable modifications between solution iterations
I'm developing a transient model using the Livelink interface. The model first calculates an initial solution for the first time window, then I would like to modify the state variable values due to...
View ArticleError-System matrix is zero
Failed to find a solution. System matrix is zero. Returned solution is not converged. Can anyone please explain me about this error?
View Articleresidual stress from laser heating
Hello I am trying to determine residual stress on a metallic ribbon (28 micron) because of laser heating. The heat source is a continuous wave laser having gaussian profile. I have already got spatial...
View ArticleElectric field not adjusting with moving mesh
Hi, I have created a model which is effectively a capacitor with a moving plate. I have ground electrodes on the fixed top plate and +/-100V electrodes on the bottom moving plate. I am using ALE with...
View Articlefailed to generate mesh for face
hello, i imported a solid geometry to comsol, but when i generate mesh i get error: failed to generate mesh for face, i tried to make custom mesh for these faces, but did not solve the problem. can...
View ArticleCahn Hilliard type Equation not converging in COMSOL General PDE module
i Have been trying to run this model is COMSOL. I am using the PDE module to solve the problem.I keep geting this error Failed to find consistent intial values. Last time step is not converged....
View ArticleLiveLink for MATLAB Y Axis Label Mirroring Problem in Mac OS X
When plotting a figure with the LiveLink for MATLAB, the Y label appears as a mirror image. I am running COMSOL 4.3a (4.3.1.161) with 64-bit Matlab R2012b (8.0.0.783) in Mac OS X Version 10.8.3. The...
View ArticleFrequency domain study for Joule heating physics
I am trying to do a frequency domain study for the physics "Joule heating and thermal expansion". However, I realized that comsol does not support this study for the physics. When I select frequency...
View ArticleExtrusion_li_battery_1d.mph COMSOL 4.3
Is there anyone have the file "Extrusion_li_battery_1d.mph" in 1D Isothermal Lithium-Ion Battery. What does it mean? If you have, could you send one to me? Thank you pretty much. my email is:...
View ArticlePhotonic crystal fiber
I am trying to model a photonic crystal fiber with liquid crystal filled holes.. I am a starter and it would be really helpful if any one can help me regarding the resources from where i can learn the...
View ArticleRuntime of plasma simulation
Dear Sir, We have some test results as stated below after so many attempts on reducing runtime of plasma module for simulating a chamber with CCP type. a. We tested several cases (such as argon_gec_icp...
View Articleboundary layer meshing ?
Hello, why is the boundary meshing interrupted in the corner of 2 edges? (attached pictures) These are the limits of my plasma reactor. The point where my electrical feedthrough is, ceramic/metal...
View ArticleSymmetry
Hi, I have a question. Could you tell me how I can apply the symmetry part to the part non-symetric ? You can see on the attached picture the situation. Left the symmetry part and right the...
View Article2 Separate Stranded Coils in Multi-Turn Coil Domain
Hi all, I have 2 separate stranded coils to be modeled for transient behavior (Current Pulse input). Since these coils are not of regular shape (linear or Circular), i had to go with numeric coil type...
View ArticleModeling Membrane Permeability in a Coefficient Form PDE Model
Hello, I am trying to model diffusion of water through a cell modeled by a circle placed in the surrounding environment modeled by a square. I first tried out the model using natural boundary...
View ArticleError function in geometry
Hello folks, I wanna to draw "erfc" function as an upper border for my geometry. Any idea ? Thank you in advance!
View Articleelectro-convection
Can Comsol solve an electroconvection problem? To clarify: a polar gas or liquid moves in nonuniform electric field. Thus, we need to solve for electrostatics, and the known field distribution will...
View Articlemodeling evanescent wave
Hi all, How to generate or simulate evanescent wave in COMSOL? can total internal reflection work? There seems to be rare examples in this field and expect for any ideas from you.
View Articlecone-jet mode in electrostatic field
Hi, Here is my problem. I want to simulate a electrohydrodynamic (EHD) phenomenone , a nozzle with full water (or electrolyte) in a electrostatic field, the the water is polarized and deformed the...
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