Transport of concentrated species, Membrane gas separation
I've attached simplified model describing transport of the one component through membrane. I've made it simple to make you catch a problem easily. In my advanced model I'm using Laminar Flow physics...
View Articleelectrical potentials
Hi, I´m analyzing the distribution of electrical potentials through different geometries with varying conductivities. An active electrode is firing with 1V under quasi-static conditions. To analyse the...
View ArticleSingle turn boundary domain ACDC module
Hello I am trying to simulate magnetic field around a inductor and I am using single turn coil domain. In the start i am trying to simulate some part of inductor not a complete circular coil. I have...
View ArticleMultiphase Flow LS - Air Bubble in Water Cylinder - Conservative forms fails
Hello everybody and thank you in advance for any kind of help you may give, I am trying to simulate a simple kind of scenario, an air bubble in a water cylinder rising due to buoyancy force. I made my...
View ArticleProblem: "Variables not coupled to any dof" in multiphysic sequence
Hello to all. I have a problem with a multiphysic sequence on Comsol 4.0. In order to simulate the electromagnetic behavior of a rectangular waveguide with a dielectric block inside, that can be warmed...
View ArticleControl Mesh element distribution over the surface
How is it possible to control the mesh element distribution over a surface (boundary) between two 3D domain? I know "Distribution" that is used to control the mesh element distribution over an edge in...
View ArticleIntegration boundary condition that is probably of circular dependency...
I tried to model the ionic exchange in a dye-sensitized solar cell. The concentration of cations in the electrolyte follows a Boltzmann distribution: Nc = N0 * exp(-Q/kT). N0 is a constant. That is, Nc...
View ArticleObject moving with the magnetic force
Hello I simulated an electromeagnetic system in which there is a moving object affected by the magnetic field. results seem correct; however, when I extract an animation, I cannot see the motion of the...
View ArticleDensity dependent on temperature and solute concentration
Hello, I am trying to couple fluid flow (Darcy's Law), temperature (Heat Transfer in Porous Media), and solute transport (Species Transport in Porous Media). I need the density of water to be dependent...
View Article3D simulations and meshing problems
Hello, I am doing some 3D simulations. I have basically some very small structures on a bigger substrate. I have to use the ignore faces operation to remove the common faces between the substrate and...
View ArticleCurrent not being conserved in AC/DC.
Hello all, I am having an issue with current conservation using the AC/DC module and a stationary 3D model. The model is two parallel pieces of copper and a small piece of aluminum between them. I add...
View ArticleChanging the relative repair tolerance seems not to be effective in any way
I need to define a geometry that is very awkward but it's necessary, It's a sphere with a very big radius compared with the thickness of a single layer (1000 times smaller, e.g. s/r = 1e-3, where s =...
View ArticleIs it possible to show cavitation phenomenon in liquid due to ultrasonication?
Is it possible to show cavitation phenomenon in liquid due to ultrasonication?
View ArticleAny sucessful study for fire simulation by comsol?
Hello! Is the comsol suitable for fire simulation? Another question is any sucessful case for high temperature (100c - 900c)environment air flow simulation with inlet and outlet condition. Since When I...
View ArticleCOMSOL 3.5a has already stopped working, please connected to the net for a...
Hi, There is a question puzzled me for a long time. In my model, thermal field, flow field, strain-stress module and ALE module are coupled. I want to make a transcient model which based a steady...
View Articleabout 'Warning : Re-ordering of null vectors failed"
Dear all, I'm trying to simulate the dynamic behaviors of the linear control solenoid valve. The spool motion is determined by the force balances, which are calculated from each field, and a...
View ArticlePhotonic crystal fiber
I am trying to model a photonic crystal fiber with liquid crystal filled holes.. I am a starter and it would be really helpful if any one can help me regarding the resources from where i can learn the...
View Articlerf mems switch design (comsol 4.2a)
HeLLO, i'm working on designing a switch that should work on rf range. I'm able to draw 2d structure in work plane but still not able to fix one side of the cantilver beam. i hve following questions,...
View ArticleEigen frequency analysis
hi, i am dealing with a nanotube sensor...can i use eigen frequency study step to find frequency at which displacement is maximum or should i use some other study step..
View ArticleUsing a Gaussian Pulse
Hi everyone, I'm actuallay working on a modeling of a laser pulse which is heating a front of a material in order to determinate the diffusivity, my current issue is that i would like to model my heat...
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