plot average values from "sub-domains"
"Beginner level" Hey I would like to plot average values (ie. concentration) obtained from "sub-regions" inside a domain as a function of the position of these "sub-regions" in my geometry (here the y...
View ArticleConstant temperature through tubes ; "No" heat exchange
Hello Model can be found: www.dropbox.com/sh/mvgwp1qbc0dcwa6/YhJhuLItkj My model of a shell and tube heat exchanger has a constant temperature-profile. It's possible that steady state inside the model...
View ArticleProblem when trying to simulate solar cell
Hello everyone, I am new to Comsol and am trying to simulate a simple silicon solar cell using the semiconductor module. I can setup the PN junction and find IV curves with no problem. However, when I...
View Articledeformed geometry for the next step
I build a 2D beam for analysis and add some force to it, it deformed then. I want to use the deformed shape for further simulation, how can I achieve it? should I export the shape ?
View ArticleExport data as .mat file
Is there any way of exporting data as a .mat file? I am trying to export the electric field data of a sytem into matlab. So far, I have been exporting as a spreadsheet, and it organizes the data in...
View ArticleHarmonic analyses in Shell module
hi, I simulated my plate with harmonic load, I get the result but the probleme that the displacement is not changed with frequency, I don't no why it is because the plate is very thin or because in...
View Article2D-axial-symmetric Elasticity - Differences between weak form and wizard...
Hello, I tried to model the deformation of a circular ring (cylindrical, axial symmetric, small deformations) by using the weak form interface. I compared my solution with a solution I generated by...
View ArticleHow to export deformed structure from COMSOL?
I simulated a MEMS module based structure in COMSOL. I obtained the deformed structure after doing the simulation. I want to export the deformed structure so that it can be used for further analysis in...
View Articlecoil group domain with impedance boundaries condition?
Hi Is it possible to use the coil group domain together with impedance boundary conditions on the coil boundaries? It seems impossible since the coil domains are removed from the model. thanks David
View ArticleMatlab LiveLink - Get Max VanMises Stress
Hi, i'm working on an optimisation using a genetic algorithm (matlab) for model generation and comsol multiphysics for solving the fe model (Solid Mechanic with prescribed displacement). I know how to...
View Article3D Surface Plots
Good Day, When post-processing in a 2D model one can use Plot Parameters/Surface to create a 3D surface plot. (Height Data tab) Working in 3D one can create a slice through a structure and present the...
View ArticleSAR in Human Head
Hi, I am interests in using the SAR in Human Head module for calculating SAR in a different tissue in the body. I am looking for any tutorial, behind the basic documentation, that describes how to...
View Articlehuman head skull stimulation by current source electrods
Hi I am new to Comsol. I have tried to build a simple model resembling human head including three layers of skull, csf and brain using the provided conductivities. I then built a tri-pole electrode...
View Articlematerial property setting?
Hi, I want to customized set the material's property in a 2D model. the material property is a function of position (coordinate-dependent). e.g. the conductivity in a 2D model changed through...
View ArticleFrequency domain modal analysis of a cantilevered beam
Hello all, I am trying to run frequency domain modal analysis of a cantilevered beam. I have built the model in Comsol 4.1 and have assigned desired material properties. Have applied fixed constraint...
View ArticleMeasuring Self-Capacitance
I would like to determine the self capacitance of a single electrode on a PCB. I have successfully built the model and solved for the capacitance, but I'm not sure of my answer. The process I used is...
View ArticleCircuit parameters from coil group domain
Hi I'm running a simple 2d coil group in frequency domain (at a single frequency) with 1A current. The model runs OK but if I try to get coil parameters (inductance resistance etc. I get an error...
View ArticleCluster Computing Convergence Plot
Is it possible to view a convergence plot when solving a problem on a HPCS2008 cluster? I know in the log file generated by the cluster that completion percentages are generated. If it is not possible...
View ArticleA few questions regarding the "Scatterer On Substrate" model
Hello everyone, I had a few questions about the "Scatterer On Substrate" model. My understanding is that the general strategy is to solve for the field in the absence of the scatterer, then put the...
View ArticleCalculating Volume Surrounded by known Surface
Hi, How am I going to calculate volume with known surface? For example, I have a hollow hemisphere with specific wall thickness. After I applied pressure at the inner surface, the hemisphere will...
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