How to create the material characteristic (conductivity) as a function of...
Can somebody help us? We cannot create characteristic in COMSOL. In our model we want to use the electric field as input parameter and as output we want to obtain conductivity. Please answer as soon as...
View Articlegrating reflection & transmission spectrum
Hi, I am trying to simulate a grating structure a get the reflection & transmission spectrum of that , I have tried S-parameter but no field propagate in the structure .Is S-parameter the correct...
View ArticleSimulation filament formation Laminar two phase flow (level set)
Dear all, I wonder if someone can help me. I would like to make a simulation using the Laminar two phase flow method (level set) coupled to an electrostatic simulation (ec module). Basically the idea...
View ArticlePDEs expressed in Weak Form Coupled to ODEs
Hello, I am currently using COMSOL 4.3a. I am solving a problem constituted by a set of coupled PDEs (depending on time and space), defined in a domain. To solve this, I used the Weak Form. In...
View ArticleOne way coupling- A reasonable approximation?
In the tutorial for FSI in a network of blood vessels, it has been narrated at the end in the results and discussion section for Figure 5. " The displacements are in the order of 10um, which suggest...
View ArticleCurrent not flowing across boundaries
I'm new to COMSOL and having some trouble getting current to flow across material boundaries in my model using the Joule Heating physics. I have a semiconductor wire with metal contacts on each end and...
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 Articlestreamline problem
Hey, i am having some problems creating the steamlines for my Helmholtz coil. I followed the steps for the one of the model on comsol website for Helmholtz coil except other than revolve to create the...
View ArticleApplying time derivative as a dirchlet boundary condition
Hi, I need to apply the time derivative of a displacement created in a piezomaterial as the velocity for a fluid boundary..... Could someone please let me know as to how this can be handled in...
View Articlewireless power transfer by pcb coil
Dear All, I want to model and simulate a wireless power transfer module. Its application is in microchip implant. The model has two 3D microstrip(PCB with substrate) coil. One for transmitter and the...
View ArticleThe ouput voltage of piezoelectric with displacement
Hello All, I am new with comsol software, now I am trying to solve the basic problem with piezoelectric device. I try to set 'electric potential ' with voltage value as 0, and set 'boundary load' to...
View ArticleAir dehumidification via liquid desiccant
Hi I want to built a model to simulate air dehumidification via liquid desiccant. In this model wet air is blown toward a tube that desiccant liquid is flowed in it. The tube is made of membrane that...
View ArticleWhat is convergence?
I'd just like to know what convergence is - in the context of COMSOL.
View ArticleJava Runtime Environment error
Getting following error, A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000003da3efbc6c, pid=6909, tid=46912497239488 # # JRE version: 6.0_20-b02 # Java VM:...
View ArticleRF MEMS swich
HI all, I am new to this software tool.I need some practice on RF MEMS. so if any one have example on RF MEMS switch, please attach here or send to my mail id billalaxman@aol.com
View ArticleMultiple-size particle tracing
Hello everyone I have a short question on the particle tracing module. Does anyone know that whether it is possible to simulat particles of different sizes in the same model. How to implement this...
View ArticleCOMSOL License Error -15, 570
Dear COMSOL team, We purchased a 64 bit COMSOL 4.3 verson of software along with a server license. After installing the software on a Linux (Debian 6 Squeeze) based system. We are encountring the...
View Articleparticle size and geometric constraint of channel
Hi, I designed a microfluidic channel with gaps at 10 um. Of course, particles with diameter at 1 um can go through this gap, but particles with diameter of 15 um still can go through this gap, which...
View ArticleRunning FSI examples, "undefined value found"
Hi!, i am trying to run an fluid-structure example with use of the MEMS module, byt anytime i get the error "undefined value found..." for the variable mod1.v_solid. So i even downloaded the 2d fsi...
View ArticleHow to apply polarized E-field?
My question is simply "how to apply polarized E-field to z-axis?" I mean the incident wave should be polarized Ex or Ey. p.s how can i fix below problem? Failed to find a solution. Singular matrix. For...
View Article