using comsol multphysics to add structural mechanics
i'd like to add the Stress and strain tensor equations and others into the comsol multiphysics plane strain (this is hopes of including gauss's law -which i can already do- to make the piezoelectric...
View ArticleBoundary conditions of one domain embedded in another domain
Hello I have two domains, one is rectangle(domain 1) and another is ellipsoid void (domain 2) embedded in rectangular domain in 2D axisymmetric. I am doing transport of diluted species. My ICs are that...
View Articleidentifying domains automatically
Hi, I have a complicated geometry containing several hundred domains and I would like to be able to identify each domain given a point in it. Does anyone know how to do this? In Comsol 3.5 I would have...
View ArticleVersion 4.3a
I just download the version 4.3a which previous version is 4.3 Now I having difficulty on open the file took about a hour to loaded. the problem is extended to saving the file. I wait for very long to...
View ArticleJoule Heating + Skin effect
Hi to all, I want to simulate the group effect of skin effect and Joule heating in a conductor. So I built a simple model of a conducting block and used Magnetic and Electric Fields (mef) and Heat...
View ArticleCan I use beam module in structural mechanics to analyze plastic problems in...
Hellow, Can I use beam module in structural mechanics to analyze plastic problems in a beam? I have tried to use the variable Young's modulus to simulate nolinear stretch, but I don't know how to...
View ArticleRadition pattern
Dear Fellows, I simulated dipole antenna and calculate the normalized electric field in the gap of the antenna (near field). Now I want to plot the radiation pattern. Can you tell me where I can find...
View Article"Use space coordinates as arguments" check bock - Interpolation Functions
Dear support-team, recently I updated my Comsol from 4.2a to 4.3a. In my models I use the interpolation functions. In the 4.2a version there was a check box "Use space coordinates as arguments" which...
View ArticleMathematical Particle tracing - resintence force
Hi! I'm trying to compute some trajectories using Comsol Math. Particle Tracing in the Newtonian formulation for some force which is of the form: F=F1+F2 where F1 is proportional with the...
View ArticleMathematical Particle tracing - resintence force
Hi! I'm trying to compute some trajectories using Comsol Math. Particle Tracing in the Newtonian formulation for some force which is of the form: F=F1+F2 where F1 is proportional with the...
View ArticleDeformation of liquid droplet
I am new to COMSOL, so I am referencing a work on deformation of liquid droplet impacting a solid surface. I tried to recreate the same model as that work. But I ran into several problems. As I tracked...
View ArticleHelp...Which Iterative solver settings for 3D RF module with periodic...
Hi All, Can somebody help me with my solver settings confusion. I'm trying to setup a 3D RF module simulation with around 250.000 elements only with periodic boundary condition. I read that I should...
View ArticleElectric Field in an object place in an EM field
Hi, I am quite new to COMSOL and with some help from tutorials I have built this 3D model where a cylinder is placed in the electric field radiated by a dipole antenna. To calculate the Electric field...
View Articlefailed to evalute variable Jacobian"
Hi: I am designing a structure which is gold stripe that is put above Silicon. I am trying to plot the Electric field (y-component) of the resulted mode. The problem is that I did not get the mode. I...
View ArticleDirect comparison to strain gage
I'm modeling a simple fixed-free beam to compare with a piezo strain gage with a foil strain gage that I have on an actual beam (aluminum, 20cm x 2cm x 2mm). I'm trying to decide which strain I should...
View Articlethermal expansion leads to overlapping domains
Hello! I have a model composed of three layers, three different materials, of very different coefficients of thermal expansion. The top layer has cracks built into the geometry. The first two study...
View ArticleTransmitted evanescent compoent after passing through the periodic grating...
Hi everyone, I am folloing the tutorial model about plasmonic_wire_grating. By setting those ports, I can get the transmission and reflection for different diffraction orders T_+1, T_-1 , as the same...
View ArticleHow to measure level/depth of perturbation
Hi, I'm trying to simulate a droplet of water hitting the surface of the water reservoir and causing perpetuation/ripples on the surface. I'm using the "Two phase flow-level set" physics module. I want...
View ArticleA Fabry-Perot Resonator simulation
It's a 3D simulation, there are two Bragg mirrors on each side of the cavity, the geometry is in the attach file[3d geometry].[ Bragg mirror is just alternative silicon and air with thickness of λ/4n...
View ArticleVoltage source in AC
Hi. i'm studing an inductor to analyze inductance and resistence od the model. I use electrical circuit and i work with AC frequency of about 20kHz and i have some questions: 1)Vsrc in voltage source...
View Article