DG method with periodic boundary conditions.
I am solving the incompressible Euler equations in 2d in vorticity-streamfunction formulation. The vorticity equation is w_t + grad.(Uw)=0 where U is the velocity and w is the vorticity. To solve the...
View Articlemaximum (or minimum) value in a time domain
Hi, I have a problem I cannot solve and you might help me. In my time-dependent analysis I would like to know the maximum of value of a variable, which has been reached at previous time steps. But I...
View ArticleHow to export data in excel format?
Hey Ivar, I want to export my figure into excel format. and replot it in matlab. Is it possible ? Thank you very much!! Baofeng
View Articleelectromagntic propagation through three layers
hello I am student on electronic and I am trying to simulate with comsol on rf module , in summarize my work is to simulate the sun light propagation through three layers bonded to each other and I had...
View ArticleStructural Mechanics Equation System
I am trying to understand how my structural mechanics model is computing its solution. The model solves and gives me a reasonable solution. However, I don't understand how it is arriving at its answer....
View ArticleFollowing the manual but got the false result
Dear all, It's weird that I followed every step in the manual but got a wrong result for thin layer diffusion model. I'm a COMSOL beginner user; would anyone who knows the reason tell me how to resolve...
View Articleelectrostatic force cause displacement in parallel plate capacitor in COMSOL
Hi, I have been designed a parallel-plate capacitor in COMSOL. Where one plate is connect to voltage of 10V and other one is connected to GND. and a air box is around the parallel plate capacitor. As I...
View Articlenonlinear material in shell interface
Hello, In 4.3 version, how can I use nonlinear material module in shell interface? Unlike the structural mechanics interface, right-click the interface icon doesn't give me the option to choose...
View ArticleMaxwell stress tensor integration
Hi everyone! I'm still trying to compare the electrostatic force calculated by the expression (F=0.5*epsilon*V^2*A/g^2) with the result coming by Maxwell stress tensor in COMSOL. I used the suggestion...
View ArticleTIC Nozzle Simulation
Hi, I am a starter here, and trying to simulate the Nozzle flow by the new feature of this edition, High Mach Number Physics. I already came up with the contour of it and import it into the comsol. I...
View Articlecomsol software
Hai sir, i'm studying final yr electronics and instrumentation dept... i do my project based on 6 axis torque force sensor using comsol software.. so please give your opinion and suggestions....
View ArticleMie scattering in 4.3
Hello, I have already seen some discussion about mid scattering of a gold nanosphere. But I the discussions I have consulted, no one has yet implemented a mie scattering program in Comsol 4.2 or 4.3...
View ArticleTrouble making magnetic flux lines appear
Hey everyone, I am trying to test the flux leakage from a solenoid (in DC) given a variety of core shapes. I am new to Comsol and, after a bit of playing, decided to simplify the problem to the field...
View ArticleBoundary flux for DG time dependant problems
I am trying to solve the time dependant advection equation w_t+ grad.(uw) = 0 with periodic boundary conditions. I am using DG to solve this problem. For periodic boundary condition, I want to specify...
View ArticleAssigning Materials to the solids in model developed
Sir, I was trying to assign material to the solids in the model. I am facing difficulties in assigning materials as the model kept on changing different colours and I am not sure whether my selection...
View Articlepower measurement
I'm using two physics piezoelectric devices and electrical circuit. The voltage produced by pizoelectric cantilever is used as the voltage source to the circuit which has a resistor. how to measure power.
View ArticleE-field enhancement
Hi, I read "Near-fields in Arrays of Triangular Particles: Coupling Effects and Fields Enhancements", I added this file. In this article, I am very interesting "using COMSOL part" because I exactly...
View ArticleNon - Isothermal Flow (nitf)
Sir, I have assigned materials to the domain elements that are required. And, in the step of inspecting the physics part after assigning materials, it is again asking for domain selection. What does...
View Articlemems
hai sir, I doing my projects(structural mechanics) simulation in comsol 4.2a so that i want some basic models and steps to complete my model.
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