Selection of physics
What physics needs to be used to analyse the stress/strain experienced by a pipe due to fluid flow?
View ArticleEffective thermal conductivity of alloy
Hi all,I am trying to model a thermal crystal made up of Si-Ge alloy and airholes in comsol 5.4, for which i am using linear elastic materials in solid mechanics module. I have already modeled the band...
View Articletriboelectric pressure sensor. electrical fluid solid mechanic
Hi, I am currently working on the development of triboelectric pressure sensor. I am now facing with the simulation of the flowing of the fluid driviive by pressure, interaction of PDMS and my fluid,...
View ArticleElement's Data
There are a simple duct and just laminar flow, Is it possible to extract the velocity of each element at outlet boundary in Time-dependent study at output times without using "excel", I mean using...
View Articlecrash test for batteries
What is the equation to be used for solid mechanics module for crash test of batteries?
View Article2D FSI Failed to evaluate reaction forces
Hi I'm performing a microfluidic FSI: 4us analysisError: Failed to evaluate reaction forcesCOMSOL version 5.3(See attached geometry and input)This is what comes out from my time dependent analysis of a...
View ArticleSimulate voids in soil
Hi, I want to know if someone have already built a model of propagation of EM waves in soil. If yes how? Thanks for your answers!
View ArticleDeformation of an agar surface
Hello alll,I'm new to comsol and i am wanting to use it to model the deformation of a disk of agar by a small force being applied to the underside of the disk by a piece of plastic. The plastic is a...
View ArticleMaximum concentration in the domain (transport of diluted species in Pouros...
I'm working on simulating a mass transfer in porous media. I am having difficulty setting the maximum concentration in the domain. The stream has a higher concentration that my domain can adsorb.Any...
View ArticleHow to Define Poisson Boltzmann equation in Cylindrical coordinates
Hi, I want to define poisson Boltzmann equation in cylindrical coordinates in comsol, can some one please help me. The equation is dsqrU/dRsqr + (1/R)*dU/dR + dsqr U/dZsqr = (kh)^2 * sinh(U)
View ArticleComputing transmittance and reflectance of glass for different wavelengths
Hello everyone, I'm a beginner user of COMSOL, and I'm stuck on a little problem. I'm using the "Electromagnetic Waves, Frequency Domain" interface to model an incident wave on a smooth surface, in...
View ArticleDifferent S11 values for the same frequency
Hi all,I simulate a pin-fed patch antenna at 3.5 GHz. When I set Frequency to 3.5[GHz], The S11 value is -28.474 dB. But if I enter range(3.3[GHz],0.1[GHz],3.7[GHz]) phrase into the frequencies text...
View ArticleContraction of a cell on a gel
Hi!I created a 2D axisymmetrical model to examine the deformation of a (stem) cell on a (polyacrylamide) gel after contraction.In order to do so, I should define a prestress over a part of the cell...
View ArticlePulsed RF ICP
Hello. I am wondering about COMSOL Multiphysics can solve Pulsed ICP problem. I know there is Pulsed CCP example in application library. But, I couldn't find any information about Pulsed ICP. Who has...
View ArticleCalculate R squared in Comsol
Hi,If I have the measured and the computed curves in the same plot (see attached file), how can I calculate R^2 in Comsol? Thanks.Best regards, Zhidong
View ArticleCap faces feature without CAD
The below post is related to an archived discussion[start here] I've made parts directly in COMSOL (not CAD) but I need to identify the volume inside an enclosed space a domain. It appears that the...
View ArticleHow can I plot the deformed boundary?
Hello,I kinda have a simple question. Maybe an interface issue. (I'm using 4.3b ver.) Whenever I perform a mechanical (mostly about deformation) simulation, the defromed boundary of the geometry is not...
View Article3D RC circuit
We are interested in modeling a 3D RC electrical circuit similar to the one presented in the attached figure (from http://web.physics.ucsb.edu/~lecturedemonstrations/Composer/Pages/64.42.html); maybe...
View ArticleQuery regarding the Sweep function in COMSOL
Sir/Madam, I'm just starting to learn about the software. I was trying to design a parametric solid 3D curve. I used parametric equations to draw the actual curve(which can be seen in picture 1 which...
View Articlehow can I find variables in prefixed equations
Hello.I want to change prefixed equations and use variables to other equations. I have seen some of the articles say not be able to change it. it also says if I really wanted to change it, change...
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