Combining a 3D magnetic field with a 2D fluid flow
Hello, I have a 3 dimensional array of magnets that creates a complex 3D magnetic field. I would like to take a 2D slice of this magnetic field and apply it to a 2D fluid flow. Is this possible, and if...
View Article3D Electric Double Layer Problem
Hello, I am trying to simulate a 3D EDL in a nano channel tube. I set artificial conditions: negative surface charge density to the tube surface, no flow condition ( dP=0, dV=0) for the inlet and...
View ArticleFluid flow and heat transfer in heat exchanger
Dear All, I am solving a conduction- convection heat transfer problem with 2 dimensional in shell and tube heat exchanger. Problem Description are as: The size of inner radius of tube is 6mm. and outer...
View Articlerigid particle carried by a channel flow
Hi I have to simulate the displacement and rotation of a rigid prticule in a fluid flow and I am not a professional on comsol. So, is there anyone who could help me? or if you have any examples of this...
View Articlesingularity. error
Hi all: I am a beginner in comsol. I have tried to execute my problem . I am using 3.4 version. I have this error error Time 0 : Repeated error test failures.May hae reacherd a singularity. last time...
View ArticleHow to model laminar and turbulent flows separated by a porous medium?
I am trying to simulate a problem involving fluid flow in 2 channels separated by a porous medium. The 2D geometry consists of 3 flat domains on top of each other. The one in the middle is a porous...
View ArticleConvergence at high Velocity
Hello, I am trying to develop a model of nozzle flow into a cavity. I have a model that I am able to run at low velocities (0.1 m/s), but have not been able to get a higher velocity (~50 m/s) version...
View ArticleFluid flow and heat transfer in phase change material
hi I'm using Comsol 3.4 ,I am solving a conduction- convection heat transfer problem and fluid flow I got this error Error: Time 0: Repeated error test failures. May have reached a singularity. Last...
View ArticleLaminar Flow with Maxwell Rheology
Hello, I am trying to build a viscoelastic flow model in comsol. It's basically incompressible stokes-flow, but not with the standard viscous rheology. Rather I want to use a viscoelastic Maxwell...
View ArticleFluid Flow-Particle Tracing-Electrostatics Coupling - Detect particles
Dear COMSOL community, I am new to COMSOL and have been tasked with modelling the trajectory of particles being under the influence of a laminar fluid flow and the electric potential of a charged steel...
View Articlecan you explain what both of them(2D & 3D) is different??
Hi I'm trying to put the friction in BC. 2D is good working but 3D is not. So I wonder what the problem is and what differnt.... I attach these files of 2D and 3D. So if you have time to check them,...
View Articleimporting a 3D gegmented image as a geometry
Hello everyone, I am trying to import a 3D segmented image into the COMSOL as a geometry. Is it possible? Actually, after testing a bunch of softwares and doing some tricky things I finally succeeded...
View ArticleCoupling 1D Pipeflow to 2D axisymmetric Porous Media
I am working on coupling 1D pipeflow to 2D axisymmetric porous media. The coupling is peformed by averaging the 2D boundary to the 1D point and integrating the 1D point to the 2D boundary. The coupling...
View ArticleTurbulent air flow through a continuously variable transmission enclosure
Hi there, I am a student working on my senior ME project. I am hoping to model turbulent air flow through the casing of a CVT enclosure. The pulleys of the CVT will be rotating at the optimal engine...
View ArticleFiltration of nanoparticles in porous membrane
Hi all, I'm simulating the rejection of nanoparticles that pass through a porous membrane. I am using the physics of "Particle tracing for fluid flow" and "Laminar flow" and set up some particles...
View ArticleSyngas Combustion in a Round-Jet Burner with comsol 4.3
Hi everybody i want to reproduce the problem "Syngas Combustion in a Round-Jet Burner" with comsol 4.3, this problem has been solved with comsol 4.4, but ! I don't know how to couple reacting flow with...
View ArticleTemperature variation in transitional flow
Hej everybody, i am modelling rarefied gasflow (transitional regime) trough a long tube (vacuum at the end). I would like to include some temperature derivations in the model. I know that the...
View ArticleMeasured Temprature Profile
Hi all, I am trying to use measured temperature profile as boundary condition. I've seen in some tutorials that there is a possibility to use "Option", then "Function", "Interpolation",,,etc. Perhaps...
View ArticleCoupling of Transport of Diluted Species with Darcy Flow with thing layers
Hello All, I'm working on a model of blood flow through a porous media. The blood flows through two main conduits an arteriole and a venule both of which have a main luminal region as well as a thin...
View ArticleDrying a granular material with heat loss
Dear Ivar, I want to simulate the heat and mass transfer during the drying of a granular material. A heated air is allowed to pass through a layer of the granular materials to transfer the heat from...
View Article