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Scattering boundary conditons for non-normal incident (using weak-contribution)
Hi all, I'm wondering, if it possible to use the scattering boundary conditions in the RF module to make a boundary transparent for a plane wave with a known wave-vector (which is different from the...
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PML does not work during wavelength sweep
I was simulating the scattering from a nanodisk by normal incidence. With a spherical PML, the scattering field should be basically symmetric below and above the disk plane. It is indeed so when I...
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Velocity of solution
Hi, Since it depends what speed calculations? I created two identical geometry. One in 2D it is counted in minutes. Second in 3D it is counted for 30 minutes to 1 hour. It is possible to calculate the...
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electrostatic 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...
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Difference between two modules in comsol
What is the difference between module " Structural mechanics--->Poroelasticity(poro)" and module "Fluid flow---->Porous Media and Surface Flow"? Anybody knows? I was gonna implement solid liquid...
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Licensed number of users already reached.
Dear sir, I am from IIT Madras and I am using an institute license. While opening the heat transfer module in COMSOL, it is saying "Licensed number of users already reached.". Can I know what the...
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Frequency domain with two input variables
Dear all If I add a external force on one end of a silicon beam while let the other end fixed, is it possible to put a constant voltage across this beam in frequency domain simulation? It seems...
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give specific values for every mesh point of a boundary as boundary condition
hey everybody, is it possibly to give different values for all points of the mesh on the boundary, respectively? for example, just a vector containing as many values as i have boundary mesh points, or...
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initial value set-up
Hi, I have a 2D simulation running from T=0 to T=100. First, I run the simulation from T=0 to T= 50. Then I want to use the solution at T=50 plus some value changes in specific domain as the initial...
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Magnetic field
Hello I created a simple model where the magnetic field and electric wire. 1 Why not spread outside the magnetic induction coil? 2 Why is not moving conductor in a magnetic field? What I made a...
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computing accurate fluxes with periodic boundary conditions?
Hi everybody, does anyone know if I can compute the fluxes accurately, as described in the user guide on page 308 ff. and file 0973 from the knowdledge database etc, when using periodic boundary...
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Non - 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...
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Assigning Materials
While assigning materials to some solids in my model, I am getting a red cross below the material name in Model Builder. What does that mean? What changes should I do to use those materials for the...
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ALE question
Hi, I'm interested in the transient effects of a moving charged object on a grounded one (see image). I have first modelled this using a parametric sweep on the object's x position. But of course, this...
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just 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...
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Embedding 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,...
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Scattering boundary conditons for non-normal incident (using weak-contribution)
Hi all, I'm wondering, if it possible to use the scattering boundary conditions in the RF module to make a boundary transparent for a plane wave with a known wave-vector (which is different from the...
View ArticleClik here to view.
PML does not work during wavelength sweep
I was simulating the scattering from a nanodisk by normal incidence. With a spherical PML, the scattering field should be basically symmetric below and above the disk plane. It is indeed so when I...
View ArticleClik here to view.
Velocity of solution
Hi, Since it depends what speed calculations? I created two identical geometry. One in 2D it is counted in minutes. Second in 3D it is counted for 30 minutes to 1 hour. It is possible to calculate the...
View Article