COMSOL Error for Initial Values(RF Module)
I am defining a model with different concentrations of oil and water and trying to measure the heat distribution by using the microwaves. But I obtained the error mentioning Initial values: THE...
View ArticlePDE solving or defining force in terms of displacement
Hi, I hope you are doing well, I am a new user of Comsol. At this moment, I am trying to model a cantilever beam with an applied force on its edge as a function of displacement. So, what I need is...
View Articleabout heater simulation in the room
Hello! I am use comsol 4.3a , and use the non-isothermal flow physics to simulate the heater in the room. And the room has a door , and I want to set the door is open, and it is connect to the...
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 ArticleSquirrel cage induction motor - external circuit?
Hi! I am trying to model a 2D short circuit squirrel cage induction motor in COMSOL v4.3a using the rotating machinery module. My goal is to get a nice distributed electromagnetic field in the motor....
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...
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