Mode analysis
What are the boundary condition which must be applied for mode analysis, is perfect match layer pml important , what is the thickness of layer. I ask if it related to the operating wavelength,
View Articleinverted mesh element near coordinate
Hi dear IVar I want to see the mechanical changes due to flow of current through two parallel wires in COMSOL. To do this, first I used two "magnetic field" and "solid mechanic" modules. After getting...
View ArticleProbe Plot unsuable in V 5.0
Hallo, since I have installed version 5.0 of Comsol my probe plots are broken. I use a global variable als "Global Variable Probe" in a transient simulation. In previous versions (and as expected) I...
View ArticleNon linear conductivity in AC
Hello, I need to simulate the behavior of a dielectric material in AC to obtain the electric field distribution. Normally I would use the Electrostatics study, but this material has a nonlinear...
View ArticleDrift Diffusion and Heavy species transport coupling
Hello I am modelling an AC-DBD plasma actuator (model is attached). I have modeled my time-dependent ac circuit and have proceeded to include the drift diffusion model and heavy species transport...
View ArticleTime list must not be zero
Hi I'm currently modelling a magnetic bottle for photoelectronspectroscopy. As a part of the model I'm interested in the particle trajectories. When I try to run the time dependent study in the charged...
View ArticleInstanteneous Jump of Temperature
Hi, COMSOL community. I model the heating of solid (time dependent task). The heating is instaneous. I.e. heat spreads through the solid without any sources but in several (point-like) moments...
View ArticleAutomatic element addition to simulate material deposition
I'm creating a model to predict temperature history during building a part from additive manufacturing using Laser as a heat source. In this case, the additive manufacturing process demands for a...
View ArticleAutomatic element addition to simulate material deposition
I'm creating a model to predict temperature history during building a part from additive manufacturing using Laser as a heat source. In this case, the additive manufacturing process demands for a...
View ArticleOrthogonality of eigenmode's spatial profiles
I'm working on a plate vibration problem using eigenvalue analysis. The dependent variables are u, v, w and arx, ary, arz. I export the mode profiles sampled at a grid and for some reason the modes are...
View ArticleAuxilary Sweep starting at 0.0
Hi I have a stationary solid mechanics model that involves large displacements and uses hyper-elastic materials etc. Setting up a "Parametric sweep" node under "Study" I am finding that some...
View ArticleMicro Thermoelectric Generator and circuit.
Hello I have designed a Micro Thermoelectric Generator (μTEG) and now I want to connect it to a simple circuit with only a resistance load (RL) to know the power disipated by this resistance. I think I...
View ArticleAutoclave with two sets of impeller blades to hollow rotating shaft - Error...
hi I developed a simple autoclave (which has two sets of impeller blades to hollow rotating shaft placed at different positions )in 3D, rotational machinery laminar flow as my physics and time...
View ArticleHow to cope with a PDE exhibiting a bifurcation
Generally my question relates to methods of coping with PDEs exhibiting bifurcations. I do it within the example of one rather simple equation. To comprehensively formulate my question I need to start...
View ArticleFluid structure interaction module discussion 2
Hi, Dear all, I guess my previous request too complicated. So i start from a single one to demonstrate fluid structure interaction module, just two single rectangular. surprisingly it still cannot...
View ArticleConfigure automation calculation task in Comsol 4.4
Dear comsol geeks there, my question is generally relative to the configuration of an automation calculation task, and the version I used is Ver 4.4, [Q1]. Can we make some automation task hook in...
View ArticleConversion method
What is the method of converting the 2D design in to 3D design in comsol
View ArticleHow to save and get the plots while solving?
In many cases for the flow problem, the solution is obtained by adopting iterative solver that means we cannot reach the solution at one time such as eigenvalue problem or frequency domain problem....
View Articleclueless error messages
Is there a list anywhere of what to look for, or what to do next (other then send the case in to support) when COMSOL returns an empty solution with the simple message "An error occured". This happens...
View ArticleI want the optimization solver to evaluate the objective at all time steps
Hello, I am using the optimization module in conjunction with the Heat Transfert in Solids and the Solid Mechanics. After computation, I always get the warning message: ' The objective is only...
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