concentration gradients of oxygen diffusing in a microfluidic device
Hi! I am using the transport of diluted species to model the diffusion of oxygen in steady state. The oxygen diffuses as followed: Air--> PDMS-->water-->cells. The cells are consuming oxygen...
View ArticleHow can I simulate lamb wave in COMSOL??
i'm trying to solve the paper of pablo Gomez about Lamb Waves and Dispersion Curves in Plates. I made the first part of this work, but i didn't know how can i do the rest. Especially how could i make a...
View ArticleRotating boundary in fluid flow problem
Hi,I am quite new to Comsol and am trying to model the stationary fluid flow around a rotating circle within a rectangle. I'm a bit unsure of how to speicfiy the rotating boundary condition upon the...
View ArticleBasic questions about ewfd in wave optics.
I noticed several examples about waveguides, such as *step_index_fiber_bend *, do not have incentive port. All the boundary is PEC. How come? Where does the electric field or incident wave come from?...
View ArticleNot full range of data displayed by volume plot
HiI am simulating a model that comprises of an electrode placed inside a domain with homogenuous electrical properties. The physics is simulated using electric current module and steady state study. A...
View ArticleModeling chemical diffusion of alloys (aluminum copper)
Please there is someone who can help me to know the technical of modeling of chemical diffusion of an alloy like aluminum copper or of any other alloy on comsol and I will be greatful.
View Article"periodic" boundary condition in structural mechanics
Hello, I am wondering how one can prescribe the correct boundary conditions to a periodic mechanical structure. For illustration purposes let's have a simple system as shown in the attached picture....
View ArticleBending Stress and Load Application on layer - Solid Mechanics
Hi,I am trying to apply an uniformly distributed load on the Module Top surface with extreme ends of Module fixed to find Bending Stress, But I find only Point Load/ Edge Load / Body Load , not on the...
View ArticleSolid Mechanical anylsis with thermal strain and predefined temperature Field
Hello,I want to do a mechanical 2D-simulation of a section whose temperature field I have determined in an earlier simulation. I cannot couple the heat transfer and the mechanical simulation, due to...
View ArticleIf Condition In Variable Definitions
Hi,I was wondering how to implement this?I want to implement the situation as follows: The original temperature of a wall is 24degC. There is a temperature profile applied on the exterior surface of...
View ArticleHow to apply voltage in extruded 3d geometry in ac/dc module
Hello I am working with an extruded 3d geometry in ac/dc model which has gold electrodes and i am applying 10mv voltage in the gold electrodes.For 2D geometry it is working fine giving the...
View ArticleSimulation plot issue (Uni individual project)
I ran a simulation and shown plots (see images) of the induced electric field in a 3D structre caused by a varying magnetic field. However, as you can see in the pictures there are many blank spots on...
View Articlecoalescence of 2 particles under surface tension of surrounding medium
Dear all,i am a phd student and I am stucked in an important model in my phd thesis. I am trying to model the coalesence of 2 visoelastic polymer particles under the surface tension pressure of the...
View ArticleActivation node with heat transfer
Dear all, I am trying to simulate the heat transfer to the environment from a filament durind deposition with the FDM technique. I made use of the Activation node from the structural mechanics physics...
View Article2 electrode electrolyte conductivity measurement
Hii allI am quite new in Comsol but I want to make a 2 electrode conductivity sensor in Comsol. This sensor consist of two platinum electrodes with a AC voltage of 50 mV rms. These two electrodes have...
View ArticleUsing a parameter for TE Mode numbers
I want to sweep over TE modes in my geometry so I can add up the total power dissipated in my system.When I make a parameter and enter it in the Port settings page (Rectangular Port, TE10), I get an...
View ArticleCross polarization radiation pattern
Hi All,I want to plot the cross polarization radiation pattern of a simple dipole antenna. Could you plesae tell me how I can do it? Or can you please show it in the attached file.Thanks Shaghayegh
View ArticleModelling Electrochemical Chloride Extraction
Hi there,I have been working on a model of ECE for the several months now.I have encountered two main problems with the model: * Calculation of the equilibrium potential, exchange current density and...
View ArticleHow to increase COMSOL precision for temperature control problems?
Hi there,I am modelling a temperature sensor in COMSOL Multiphysics v5.2a. I want to evaluate a boundary condition (BC) to 1 when the temperature is below 39 degC and to 0 when it is higher than 39...
View ArticleExpression error
After running a simulation for a 3D structure with a magnetic field going in the z (vertical) direction, COMSOL returns the following error: Division by zero. - Function: / Failed to evaluate...
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