how to plot the velocity profile between any two points in Comsol 4.2
In comsol 3.5, when I want to get the velocity profile from (0,0) to (0,4), I could use postprocessing--> cross section plot parameters --> line plot, then I can input cross section line data....
View ArticleMie scattering in 4.3
Hello, I have already seen some discussion about mid scattering of a gold nanosphere. But I the discussions I have consulted, no one has yet implemented a mie scattering program in Comsol 4.2 or 4.3...
View ArticleHow to use parameters between different physics?
Hello, my name is Wang Jiujiang from University of Macau. I am using COMSOL to simulate a capacitor, after I simulated using DC voltage, I want to add AC voltage. After I add a physics--circuit and...
View ArticleUsing a Probe Value for a Stop Condition
Hello fellow COMSOL users. Can someone refer me to a model or tell me how to solve my problem. In a system undergoing resistive heating I want to use the calculated resistive energy as the stop...
View ArticleVibration of a cantilever beam
Hi, I am trying to model a beam oscillating under external vibration condition. I have kept one end of the beam fixed. I have tried applying different kind of boundary conditions to solve the problem....
View Articledoes a periodic boundary condition for u implement inflow u (boundary1) =...
Dear everyone, I have a question about the implementation of periodic boundary conditions for fluxes, so that the inflow through one boundary equals the outflow through the other. In comsol 3.5, this...
View ArticleSpecifying a rotating boundary condition
I would like to simulate a rotating wall condition. For simplicity, imagine a square box. On the top surface of that box there is a circle. Inside of the box is a viscous fluid. I would like to impose...
View ArticleFrequency sweep in a magnetic field interface
Hello everyone, This should be seemingly siomple problem. I am trying to model the AC magnetic field due to a coil in 3D. I am using a magnetic field interface on a simple cylinder (acting as the coil)...
View ArticleImplementing weak constraints
Hello, I am trying to implement weak constraints on my boundary using a model coupling integration variable. The idea is that flow at the boundary is determined by change in the area at that time. Here...
View ArticleHow to change the capacity of lithium ion battery
hi, I am trying to run the lithium ion battery 1D isothermal model from model library .The capacity of cell used in the model is 17.5Ah. How do I change this capacity. Thank you Syam TP
View ArticleVariable change with time
I have a question about variable change with time. I try to make a mass transfer model. The inflow concentration change with time. If t <= 1000s then C=1mol/m^3 else C=0 I upload the data and make a...
View ArticleFailed to evaluate variable Jacobian
Hi I simulate the rib waveguide with the sio2 substrate and material of the core Er:Ta2o5 i define the lambda=1550nm in global definition>parameters, and in the step 1:frequency...
View ArticleHigh current output
Hi everyone, I am simulating a heat treatment with the induction heating module and I'm facing a problem concerning the single turn coil. More specific I import as a coil excitation the a power of...
View ArticleCalculating Electrostatic Force without MEMS Module
I've been having difficulty coupling the Electrostatics/Structural Mechanics/Moving Mesh applications. I was previously given advice to look up the MEMS 3D Cantilever Beam model to help me understand...
View Articleimporting txt file to create geometry in comsol 4.0a
hi can i create a geometry by importing coordinate data existing in a text file in comsol4.0a? suppose i am having (x,y) data in a text file and i want to use this data for creating geometry in...
View Articlemode analysis for hollow core photonic crystal fiber
Hi, Is there anyone has experience doing mode analysis for the hollow core photoni crystal fiber? I tried to build the model but cannot find the confined mode although I am pretty sure the parameters I...
View ArticleHow to loop simulations in Comsol 4.2a with Matlab
Dear comsolers, here is an example on how to loop simulations. I'll let you decode it. 'Preprocessing' that I did before the loop: 1. Build a model in Comsol (attached). 2. Save As Model M-File...
View ArticleJoule Heating with Thermal Expansion Simple Setup
Good Afternoon Everyone, I am new to COMSOL but have used other software for simulations (ANSYS), I am currently trying to model an aluminum wire embedded in a polyethylene substrate, just doing a 2D...
View ArticleMetal film with subwavelength size hole: Transmmittance and reflectance study
Hi I'm novice in comsol RF simulation. I'm trying to simulate transmittace and reflectance throught metal film with subwavelength size hole. My structure will consists of Air/metal/semiconductor...
View Articleelectromagntic propagation through three layers
hello I am student on electronic and I am trying to simulate with comsol on rf module , in summarize my work is to simulate the sun light propagation through three layers bonded to each other and I had...
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