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Joule heating on thin films
Hi everyone! I am struggling since quiet some time with a problem in joule heating in thin films. I have a resistor on a microscope glass slide and I am able to simulate Joule heating on the glass...
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Electric field lines
Hello, I wanted to visualize how the electric field lines develop between oppositely charged electrodes of various shapes. I had chosen electric current or electrostatics as my physics interface. Also...
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Results - Density current
Hello, I'm current working in a 2D simulation of a conceptual motor and I need some help interpreting the results. I defined a copper conductor as the boundary of a cylinder of iron. The copper...
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Import from SolidWorks
Hi, I was following the tutorial for the cooling of an injection mold (www.youtube.com/watch?v=JyXhGKN3iX0), and I want to ask is there any way to import the curve for the cooling channels directly...
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Interpolating 3-D data
Hi all I am trying to use some 3-D data i.e. temperature profile across and x and y surface. The data is stored in and excel file. I want to interpolate the data to form a function as T = f(x,y) and...
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Stress Strain Curve at different temperatures giving problem
Hello friends, I am trying to implement engineering stress-strain data obtained at various temperatures. Based on "temperature dependent plasticity" example model and "elastoplastic " example model i...
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Planar Capacitor Sensor: Simulating two dielectric layers in Series
Hello All, I have a little dilemma. 1) I have built a model of a 'Comb shaped' capacitor sensor and simulated using COMSOL which worked great, I simulated changes in water level in a PVC container the...
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Displacement Field
Hey: I would like to know what is the difference between Displacement field and Displacement gradient. I developed a poroelastic model to simulate a reservoir in the soil.
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Electric field lines, Current density lines
Dear All, I have trivial issue. I have model which consists of metal nanoparticles on substrate (RF module). After simulation, I want to plot electric field lines (Ex and Ey component) and current...
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Hiding geometry/domains
Hello, i'm pretty new to comsol. I modeled an IR-Thermopile sensor with the heat transfer with surface-to-surface radiation. In order to realize some convection, the sensor is clouded by air. Question:...
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Magnetic shielding
Hello, Can someone tell me if I make a magnetic shielding by selecting the boundary's and specify a thickness (ds) and permeability on some wires it would be the same as if I just created a shield in...
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Magnetic shielded room made from Al in real magnetic field
I need some help, I want to model a 3d shielded room 12mm thick (2mx2mx3m) placed in real magnetic field (geomagnetic, frequency range 0-300Hz). When I select the AC/DC model, magnetic field, frequency...
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coil above ferrite bars
Hi all I want to simulate the structure of two coils of first coil is placed on ferrite bars and second coil is simple coil which both are separated by distance of 10 cm . I tried to construct the...
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problem meshing thin layers
Dear All, I have trouble meshing my geometry(attached). My geometry consists of very thin layers(0.1mm). After reading some discussions i tried many options like giving small element...
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Calculating the Electric Field by applying a potential
Hello Everybody, I want to simulate the following problem: I have a geometry (for simplicity assume it is e.g. a box) which is hollow (there is a vacuum inside), and the boundaries consist of some...
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anisotropic material
Dear All, I would like to build an RF wave guide that consists of three regions the left and right are made of air and the middle is made of an anisotropic material where epsilon (permittivity) is...
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Large deformation of a 2-D square
Hello All I am trying to apply a large shear strain on a square domain. The geometry is very simple, just a square where on the upper and lower edges, opposite velocities are applied. In order to...
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How to make a vacuum chamber in a capacitor?
Hi, I am trying to model a MEMS capacitor built on the silicon substrate. The thin top plate(membrane) of the capacitor is also made of silicon. The gap between the plates is vacuum sealed. So with...
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Magnetic field density more than saturation
Hi all, I'm modeling a power inductor in comsol 4.3. I'm shocked when I saw a magnetic field density of 40Tesla in a soft Iron (with loss). I was wondering if anyone knoes the reason.
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S parameter and shielding effectiveness of RF wave incident on perforated plate
Hello: I am brand new with comsol. I would like to simulate the transmission and/or attenuation(shielding effectiveness) of the electric field passing through a perforated (circular holes) metallic...
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