Membrane Contactor (Liquid-Liquid)
Hello! I am fairly new to COMSOL and would like to ask if any of you had dealt with modeling on membrane contactor (liquid-liquid is preferable or any phases)??I would like to know where should I start...
View ArticleComsol crashes when exporting filter as mesh part
Hi, I am currently struggling when trying to export a filter group as a mesh part. When importing the filter data set, Comsol crashes without giving any warnings. This is only the case when using the...
View ArticleHow to set upper or lower limit for dependent variables
I want to set a upper limit value for the dependent varible c to promise c<=2. but I type in the input box '2 c', error occurs : 'Unknown model parameter. - Parameter: c'. How to solve the problem?
View ArticleSimulating large deformations of a bending beam in a fluid
Hello, I want to simulate large deformations of a bending beam in a fluid. I use Solid Mechanics, Creeping Flow and Moving Mesh (ALE) but I get mesh related errors due to distortion of mesh. I’ve...
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Moving Boundary Smoothing
HiI am working on a comsol model. The model includes solid mechanics with deformed meshes module, Mesh Smoothing type =>Laplace. I have one moving boundary. The movement of the boundary is governed...
View ArticleIrregular Time Stepping
I am currently modeling the induction heating of a low carbon billet at 40kHz, over a time of 200 seconds. I am having some trouble with the solver, which is unstable and is outputting values at...
View ArticleConverting a 2D time-dependent PDE into the Weak Form in Comsol
Hello,How to transform the equation attached into the weak form in comosl? I'm struggling in representing the highlighed parts. Am I doing something wrong when breaking down the equation?...
View Articlepressure contour problem
Hi I am working on simulation of variable conductance heat pipe. I use from evaporation in porous media with large rate model. I get temperature, velocity and concentration contour.These contours are...
View ArticleMaterials not effecting electric field
HiI'm trying to take a look at a needle full of liquid that has a high voltage electric current applied to it. The steel needle is enclosed in a steel bulkhead, which is at a high voltage, and is a few...
View ArticleTransport of Diluted Species with Laminar Flow
I am trying to model a simple TDS using a laminar flow with two inlets and one outlet. I have successfully set up the laminar flow with 2 inlets and 1 outlet but after adding the TDS physics to the...
View ArticleView scaling along one axis
Hello,I have a relatively high aspect ratio device and am trying to plot the cross sectional area through the center, however the size difference is making getting any relevant images difficult. So my...
View ArticleDeformation of one domain into another
I'm trying to model the flow of an ice deposit on top of a fixed rocky unit using solid mechanics creep (attached). The base of the ice is fixed to the rock and material above the base moves outward,...
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Frequency-Scan Phase Delay Measurement for Contact Resistance between Materials
I am attempting to use COMSOL to simulate the temperature response at a surface (1-D model) at a range of frequencies (1 Hz to 10 kHz) under the influence of a sinusoidal heat source. I am then using...
View Articlepressure in laminar flow
I am running a CFD simulation using the laminar flow module. The module uses Navier Stokes equation in ahich the fluid velocity is the dynamical variable. The equations it is solving are clearly stated...
View ArticleIonic Polymeric Metal Composites Simulation
Hello,I would like to know how to simulate an IPMC beam. Ionic Polymeric Metal Composites beam consists of 3 layers: top and bottom layers are metal electrodes and, in the middle, there is an ionic...
View ArticleVolume Force for Malaria infected blood material
I am trying to model blood flow with Malaria infected blood (laminar flow, stationary navier-stokes equation), and need to define the volume force to introduce Malaria to the simulation. However, I am...
View ArticleHow does one create point sources?
Hello,This may seem like a silly question. I am new to comsol and am attempting to create a very simple model for educational purposes. I wish to create 4 point sources in a square configuration and...
View ArticleHow to couple immersed beam with surrounding fluid in 3D
Dear all,I want to simulate the fluid-structure interaction between an immersed steel frame and the surrounding fluid in 3D. The steel frame is modeled by beam element. Comsol would not allow this FSI...
View ArticleExcluding edges from solution
Hi, I'm trying to create a geometry where I use a set of lines to apply a constant Dirichlet boundary condition. Currently, I'm doing this by creating a set of lines and making a union with these and a...
View ArticleElectrostatics vs. electric currents?
Hello, I am trying to simulate the electric field inside of a nanochannel filled the water using 2D geometry. The field results from three parallel electrodes (one with applied potential and another...
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