Comsol 5.5 cannot be launched after installation
After i install it, there is no react when I click it. Only the update is working.
View ArticleEvaluate Impedance of a coil
Hello All, I am trying to include impedance calculations in my model.To keep it simple, let's consider my model to be AC/DC analysis with a single conductor coil. To realize it I followed the example...
View ArticlePiecewise constant function over a boundary
Hello,I have a 2D axisymmetrc model and I'm trying to define an input pressure on the edge as a piecewise constant function of the r-coordinate.Here's what I want to have for each segment:...
View ArticleVariable time step for pulse features
Dear All,I am trying to model a dc discharge in nitrogen with plasma module.The time dependent solver works fine to a point with time steps of 10^-8s. However, at a cetain instance in time, there is a...
View ArticleModeling no separation in Comsol
Hi,I am a new user of comsol. I am trying to model sliding in Comsol with no separation. I have tried to approaches to tackle this. 1. With adhesion contact and 2. General extrusion and prescribed...
View ArticleWarning exists during Form Union
Hello everyone,I met a problem by forming an union: when I try to form a union, half of the geometry is removed (2D model, r<0 is removed, axis symmetric), what should I do for this ?
View ArticleOptical self heating?
Hello everybody,is it possible to model optical self heating in COMSOL? Currently I'm trying to simulate a silicon photonic ring resonator/modulator using the wave optics module. The resonance of such...
View ArticleCan you give me some advice about the simulation of biofuel cells?
I'm a postgraduate student majoring in enzymatic biofuel cells. I wanna to construct a membraneless biofuel cells model consisting of anode, cathode and electrolyte. The fuels for anode and cathode are...
View ArticleGeometry causes abnormal physics settings
Hi everyone, I made a inductive heating coil with a complex geometry composed of multi-geometric shapes. When I set physics，it shows different domains rather than one total domain. The coil geometry is...
View ArticleReversing the axis plot
Hi,I am trying to plot a graph where one of my axis value ranges from 80 to 210. I would like to reverse the numbers and start from 210, in other words reverse the axis. Does any one know how to...
View ArticleGetting the surface from a domain programmatically inside livelink
I am trying to use a coding approach, for varying models etc, to building my simulation. When it comes to exporting results I want to export values of data on a surface.So I have a domain and I want to...
View ArticleAn optical fiber coupling to a waveguide
Hello, I would like to simulate the coupling between an optical fiber and LiNbO3 waveguide. Is the Beam Envelope Method a useful tool for this problem? In particular, can it manage the discontinuity of...
View ArticleConvergence criteria of the segregated solver are met but not all conditions...
Hi,I have constantly encounter a message like this:Convergence criteria of the segregated solver are met but not all conditions for group Heat transfer are fulfilled.Convergence criteria of the...
View ArticleSeparate Studies in 5.5 Results in Undefined Variable Error
I am running a frequency domain simulation with the wave optics module to measure the resitive losses (ewfd.Qe) for an optical absorber. I then feed that value as a heat source into a time dependent...
View ArticleWhat is the difference between full field and scattered field?
As stated in the title, I was just wondering what the difference between Full Field and Scattered Field in the RF moduale is?
View Articlehow to export the time steps taken by the solver to MATLAB?
I'm using the COMSOL LiveLink with MATLAB. When I solve time dependent problems and I let the solver choose the time steps (i.e. I only specify the start and end time), I can retrieve the solution in...
View ArticleArea Calculation in a results graph
Hi,I want to calculate the ratio of blue area over the red area. How is it possible to get the surface area of this kind of plots from results.Thanks in advance, Reza
View Articlelaser diode design by comsol
I want to design laser diode using 3d or 2d structure. as i cant find a specific example so if anybody working share with me. using semiconductor module.
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AC purturbation on top of a DC voltage
Please see the attached MPH file for drawing.How to excite a slab with an AC perturbation voltage on top of a DC bias voltage in COMSOL? Let's say I have a slab, I want to apply voltage on both ends...
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