Nested geometries
Hello. I am trying to create a model in which there is a cylinder containing two ellipsoids, which are contained within each other, one being larger than the other. The larger ellipsoid is s1 and the...
View ArticleImplementing Dirichlet boundary condition using weak constraint
Hello everyone.I am trying to solve the Laplace equation on a square with Dirichlet boundary conditions. I would like to know if it is possible to implement the boundary conditions using the weak...
View Articlecalculation pressure in 2d and 2d-axi
Hi, all I need calculated the laplace pressure in water flow system. I simulate 2d and 2d-axi example However, the pressure values are different, although, both have the same mesh size, equations,...
View ArticleCreating separate subdomains
Hi,I'm fairly new to comsol and am currently having a bit of trouble creating two separate domains within the same geometry for a fluid flow problem. I'm working with a simple two dimensional geometry...
View ArticleNonlinear Frequency Response
I am interested in modelling the effect of geometric non-linearity on the frequency response of a resonator. However, most of the problem seems to be linearised. I am trying to generate a nonlinear...
View ArticleExport plot data to text file while solving.
Can we make COMSOL to export a plot data to a csv file while solving? This would be greatly helpful while running large simulations, to see progress and to salvage some data if the solver crashes.
View ArticleCoil Geometry Analysis Error
Hi, while Solving Coil geometry analysis for an e-core transformer i am getting an error (Numeric coil Coil 1 (coil1) not solved for. Solve it in a Coil Geometry Analysis step).i have defined the...
View ArticleMagnetoelectric device in frequency domain
Hello everyone, I am trying to simulate a magnetoelectric device (with sandwich structure of magnetostricitive and piezoelectric materials) under the AC magnetic field. For that, I have made a...
View ArticleHeat transfer in a fibrous structure exposed to a heat source
A fibrous structure exposed to a heat source is a multi-physics problem. Heat transfer within the structure happens in all three modes: conduction, convection, and radiation. The conduction happens...
View ArticleElectrothermal and thermomechanical simulation of GaN based transistor
Hello everyone !!!I am currently doing my Master thesis project on the topic shown in the title. I dont have much experience on COMSOL software so I would be happy of any help about the simulation...
View ArticleSimulating metal-insulator-solution boundary
The below post is related to an archived discussionHi,I have got the same issue for simulating metal-insulator-solution boundary. I am not sure which boundary condition is proper for this. and if EC or...
View ArticlePN Diode maximum forward current; Thermal breakdown;
Hi all,I'm studying the ESD device performance and characteristics. I have created 2D geometry of a simple PN heterojunction silicon diode. I've succesufully simulated the IV curve of the device in...
View ArticleRandom vibration analysis in 5.3+
Hello,I would like to simulate random vibration on a simple beam structure (similar to the documentation example for "Vibration Analysis of a Deep Beam"). Ideally I would like to define the random...
View ArticleSPICE model import error
Hello,I am trying to model an op amp which changes the amplitude of the output of an LVDT that I have already modeled. The LVDT is modeled using the magnetic field physics and I have tried adding an...
View ArticleCalculating A Parameter Over Time in Results
Hi all,I'm simulating a burning tissue using "Heat Transfer in Porous Media" module and solving problem in time dependent but having some hard time on calculating a parameter. I would like to...
View Articlepdms based capicitive sensor
hi sir,hope you doing well! i am trying to model a microstructered pdms based capicitive sensor in that for finding displacement in x ,y,z component it shows some patches on it and i cannot find...
View ArticleResistive Transducer
Hello, As a part of my project I am supposed to design a Graphene based Resisitve pressure sensor using COMSOL. Are there any models in COMSOL using which I can work. Any help is highly appreciated.
View ArticleComsol 5.2 : Annotation in deformed 2D or 3D plots
Hello,My model made in 5.2a assumes non-dimensionnal equations. As such, in 2D graphs, I use deformations to illustrate the results in dimensionnal space. However, I cannot use add deformations to the...
View ArticleHow to perform Two studies for the Two different Physics Model
Hi,This is in regard to RF MEMS Switch connected on a Microstrip Transmission line.RF MEMS Switch and Microstrip line works perfectly when operated sepearately.But there seems to be issue how the...
View ArticleWave Optics Module - AC/DC Module
Hello,I would like to know if for modeling and calculate the scattering of a nanosphere is compulsory to use the Wave Optics Module on the physics tree or it could be done by using the AC/DC Module...
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