Electric energy calculation problem between two parallel plates.
Dear All I want to calculate the electric energy between two parallel plates. One plate is fixed and another plate is moving along the Z-direction(moving 'up and down'). Therefore, the electric energy...
View ArticleCircular variable dependency detected
Hi, I am trying to solve a problem of a 3D acoustic perforated panel under un incident plane wave. When running the simulation, i get this error:"the following feature has encountered a proble:...
View ArticleSolar Cell model design in comsol
Hi, I want to simulate the solar cell using comsol.But i am confused about the module and can not understand how can i apply the solar source on it. Can any one help me regarding this topic. Thanks...
View Articlecalculate the electric field near a pylon
Hi everyone, I just started using COMSOL and I could use some help. I would like to compute the electric field near a pylon caused by 6 conductors. I set up the 6 conductors with a potential:...
View Articlequestion about resonator of quartz AT
Hi, I have simulated a TSM resonator to make up of AT-cut quartz crystal (using piezoelectric devices). In my model, I have to incorporate an adaptation layer of the same material as the piezoelectric...
View ArticleContact angle in COMSOL
Hi, COMSOL allows to set a constant contact angle for multiphase flow simulations. What is the limit at which this assumption is valid? Moreover, is it possible to set a dynamic contact angle in...
View Articlerescaling plots
Hello all, I've already created my surface plot, and proposal is that observing water fluctuation in floodplain, so the wide of floodplain is 420 meter (x-direction) and water fluctuation is less that...
View ArticleCapacitance graph
Hi! I am analysing capacitance over few layers and I wonder why those spikes appear in attached file? Is this some kind of numerical/computing problem? I think it should be flatline ... problem could...
View Articlecapacitance of a parallel plate capacitor
These are the steps for my capacitor simulation 1. set two solid blocks (dimensions (25x1x20) ) 1 distance away from each other. 2. set a solid box (65x43x60) to surround the plates of the capacitor....
View ArticleGeometry Parametric sweep
Hello, I want to run a geometry parametric sweep. Consider the following geometry sweep parameters: H range(20[mm],10[mm],60[mm]) Z range(0[mm],10[mm],20[mm]+H) The idea is that Z maximum value is...
View ArticleCapacitance measurement
Hi all, I try to make a simple simulation. I want to calculate the capacitance between two plates and the variation with the variation of epsilon's sphere, but it doesn't work. Where I'm wrong?...
View ArticleStresses in Cylindrical Coordinate
In my model, a part has a cylindrical shape. I want to get the stresses on the circular surface using cylindrical coordinate I have changed the coordinate system to cylindrical system. However, I am...
View ArticleImproving precision of derivatives
Hello, I have a pretty simple 1D simulation. I can solve it with COMSOL just fine, and the results are good, however when I take derivatives (even just the first derivative), I notice there can be...
View ArticleQuickly, please: can I set a time delay for a simulation start?
COMSOL'ers: I know there is a way to set a timer up to 24 hours on a Batch Sweep; however, is there a way to do so for any other standard solving steps? A parametric sweep, for example? The...
View Articlechanging "ThinThermallyResistiveLayer" selection set with respect to time
I am using MATLAB live link to make a heat transfer model. The geometry that I am using contains several cubes which are in contact with each other. I want to apply "ThinThermallyResistiveLayer" to...
View ArticleSubdomain integration for effecive area calculation in PCF
Hi, I am doing a project based on parametric analysis of Photonic crystal fiber. For calculating effective area, I selected the option subdomain integration. I have given Ex*conj(Ex) to calculate...
View ArticleHow to find the volume of the model?
Hello all, I have built a 3-d geometry in Comsol. I want to find out the volume of this model. I know that I have to integrate the domain. But I do not know how to see the results. Can anyone help?...
View ArticlePML with structural mechanics
I am trying to use a PML with my model. The model uses solids and shells in the structural mechanics. The PML is around a solid block on five sides. However when I attempt to solve I get the error...
View Articleintegration points
Hi I need to extract the value of a parameter with in an element. I studied in one of the forum that I can do that by using gauss integration points while exporting the data. But How and where I can...
View ArticlePoroelastic waves - acoustic module - material definition
Hi, I would like to model a poroelastic material with the acoustic module. However, can you tell me how I can link my parameters to material proporties. My parameters are : - porosity - tortuosity -...
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