thermal magnetic motor and or generator
Along time ago I had the thought after reading and studying about patents by Edison and Tesla on the development of a thermal magnetic generator and/or motor Has anyone ever tried to follow through...
View ArticleFlooding with COMSOL
Hello, I want to simulate the inundation of the island due to water rise (as external parameter). Can I do it using COMSOL? If yes, Is It possible to combine it with the model of porous media? regards...
View ArticleSimple supported boundary condition in Comsol
Hi, guys. I'm actually studying cylindrical sound diffusers using Comsol 4.3a and I need to add simply supported boundary conditions. Is there any way to do it? I have noticed there's several...
View ArticleSetting initial values for an iterative solver
Comsol user interface shows some options for setting initial values at the stationary study step at 'Initial values of variables solved for'. These are either zero or a solution - but we want to set...
View Articletrack velocity of inflow fluid
Hi all, I have a tube which has an inlet to allow fluid to flows in. Would like to know, how can i track the velocity of inlet fluid flow when it flows inside the tube? By using particle tracking...
View ArticleAccess to a local stiffness matrix - possible modification of the gloobal...
Dear all, I´d like to kindly ask you if you could tell me, if there exists a way how to ge the access to the global stiffness matrix assembling process in order to make some modifications. I don´t want...
View Articlebeam vibration by a shaker
Hello, eneryone. I am doing a project simulating a simple beam structure vibrated by a shaker. The left end of the beam is fixed with the shaker. If I want to set the beam vibration acceleration at 10...
View ArticleHow to solve the problem of negative concentration
I am a totally new user on comsol. Now I try to simulate the mixing in the microchannel without reactions. I use the laminar flow and Transport of dilluted species. There is a similar example from...
View ArticleMie Scattering problem, Csmcol 4.2a
Dear Fellows, I want to find module about "Mie Scattering", but I can not access to this module.www.comsol.com/showroom/gallery/3459/ Is that module still exist in the gallery or not? Thank you for...
View ArticleComsol 4.2a, RF MODULE, Mie Scattering
Hello Fellows, Can anyone send me .pdf file about Mie Scattering module, or .mph file but for 4.2a version.? I have to learn about scattering and absorption cross section, so i think it can be very...
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Area terms while using Axial Symmetry
Hello everyone, I have what I beleive to be a somewhat simple question. I would like to model simple heat convection out of a cylindrical wire or water pipe. It really doesn't matter what it is, just...
View ArticleOscillating boundary condition
Hi, How can we impose oscillating boundary condition in terms of velocity, on a boundary of a defined geometry. Thanks in advance Saurabh
View ArticleDiffraction on an isolated line
hello everyone, I have a problem. now I want to simulate the diffraction for an isolated line, and I want to observe the intencity of different diffraction orders, both transmitted and reflected....
View ArticleWhy does COMSOL lead to zero solution for a high-order PDE?
Dear all, I'm trying to solve a system of PDE, where the highest order is 4. COMSOL supports finite elements of 5th order. So solving the equation system should be possible by using COMSOL. But the...
View ArticleUnits in global ODEs
I am creating a model that uses global ODEs to provide values for boundary conditions for a domain-based PDE model. The PDE model variables can be fully populated with units but the global ODEs appear...
View Articlewhere can we find the parametric symbols of different variables????
Hello Friends, Am a beginner to Comsol Multiphysics and i find difficulty in knowing the parametric symbols being used in modeling!!! Thank you.
View ArticleWarning in meshing!!!
Hello Everybody, I tried to simulate a 3D problem in electrostatics and found the following warning message under meshing,"face is much smaller than the specified minimum element size". Please help me...
View Articlewhy my model works on Mac OS but not Win 7 64bit
I have a very funny situation in the coupling the fluid flow with moving mesh and transport of diluted species. It works very well with macbook air 2011 version but not with my HP PC workstation 8gb...
View ArticleHow to model adsorption on a solid surface for a 1d stationary model
Hello, I created a 1D, stationary model using the Diluted Species Interface to model the diffusion and reactivity of several species within a diffuse layer adjacent to an electrode surface. Now I am...
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