Save the Date - COMSOL Conference 2013 Boston, Oct 9-11
Hello, We are excited to announce that the COMSOL Conference 2013 Boston will be held on October 9-11th. With over 50 events to choose from, including training and presentations, this is the premier...
View Articlejust start with a known solution for first time step
Hi, there is a simple solution, or? I perform a time-dependent study. But the input variable for the time is not long enough, so I want to repeat this pattern several times. Unfortunately it does not...
View ArticleEmbedding a Circle on the Curved Face of a Cylinder.
Hello, I am a new user. I am trying to create a model where there is a flux coming into the curved side of a Cylinder. The flux enters from a circular area connected to the curved edge of the cylinder,...
View ArticleError-Automatic remeshing
Hi, I encountered a problem about "Automatic remeshing" with "deformed geomerty" and Time-Dependent Solver When I ran the program, Comsol always displayed a Error: Unsupported operation on this type of...
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 ArticleTwo interdependent studies - but I cannot use results from frequency domain...
Dear all, How can I use the result from a parametric (parameter 'b') sweep-frequency domain study (e.g. emw.Ez(b) ) in another function defined under Definitions (e.g. f(emw.Ez(b)) ) which is used as...
View ArticleNon - Isotherma pipe flow
I am not able to find the "Non - Isothermal Pipe flow" module in my COMSOL 4.3a version. Can you help me out how to find it?? If not, I request you to help me with any method for simulating a pipe flow...
View ArticleElectrostatics and Electric Circuit
I am relatively new to COMSOL. I am trying to simulate a two part problem. 1. An electric pole is placed underwater 2. A circuit is built around it to measure the voltage drop across a resistor The...
View ArticleDG 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 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 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 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 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 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 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 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 ArticleStore solution and use as a boundary condition for the next run
Hi Does anybody knows how to apply the results obtained at the outlet of first run back to the inlet as an inlet bounrady condition? Actually the objective is to study a flow in a long clyinder by...
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