the frequency domain or the transient modulator??
i want to choose the wavelength between the 300 nanometer and 1500nm. it's well known to us that the range of the wavelength correspond to a pulse with a fixed width. how can i successfully set the...
View ArticleMeshing and convergence problems
Dear Comsolians, I was finally able to draw the problem in 3D in Comsol :), am also a beginner, lol. The way I have modeled the coils is that they do not form a complete closed loop, thus I assigned...
View ArticleVariable 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 Article2 sets of PDE equations with same variable
Dear all, I have a Comsol model in which I have two almost identical sets of general PDE equations. This is because i first solve them with a stationary solver to find stable initial conditions and...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
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 ArticleConstrains and laminates
Hello, id like to simulate a laminate with around 5 isotropic laminated layers. These layers are in the form of a plate with a constant area load. The model is a laminate for photovoltaics with area...
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!
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