magnetic field intensity distribution
Hi, i have a pipe that consists of some stainless steel wires with a magnet out of the pipe and magnetic nanoparticles flow through the pipe. How can i simulate this system and the magnetic field...
View ArticleNo change in laminar flow simulation results even after changing material...
Hi, I have been doing very straight-forward and simple laminar flow simulations in a chamber. I have observed that flow simulation results don't change if I add and use another fluid with different...
View Articlemems based capacitive type humidity sensor
Hello I am working on capacitive type humidity sensor in which I've to model diffusion of humidity in polymide layer that will change the permittivity of polymide hence changing the capacitance between...
View ArticleInput for inlet of Charged Particle Tracing
Dear Comsol gurus, I'd like to know if there is a technique to read out a file with exact initial positions and velocities for the charged particle tracing. I don't mind using Matlab via the Livelink,...
View ArticleModeling a closed vessel pre-stressed by its internal fluid
Hi, I am trying to model the dynamic deformation of a vessel which contains incompressible fluid (fully encapsulated) under external load. At the initial state, the fluid has internal pressure such...
View ArticleError - 3D LID Driven Cavity Flow
Hello Forum, i try a computation for the "3D lid-driven cavity flow" model. I got a Comsol Error: Failed to find a solution. Divergence of the linear iterations. Returned solution is not converged. I...
View ArticleCUDA and COMSOL
Dear all, I have a new NVIDIA Quadro GPU and I would like to use it to accelerate my simulations, is it possible to use it somehow? I looked for some informations and it seems to me that CUDA it's...
View ArticleProblem to converge a Reaction engineering, Diluted species transport and...
I want to degrade one component in a 3D geometry along with diluted species transport and laminar flow in it. My simulation runs okay in stationary study (i used step function here). But when i want to...
View Articlecan you explain how to put the friction??
Hello, I'd like to learn how the friction in 3D Non-Newtonian mode is given the comsol. please, let me know if you know that.
View Article2way FSI simulation - deformation of pipe due to sinusoidal flow ...
Hello, I'm going to model a simple artery , here is the model definition: =========== Model data =========== A cylindrical artery with 10mm radius, 1mm thickness and 80mm length is considered with...
View Articleosmotic pressure
Hi all, we're two Politecnico di Milano's students using Comsol software (4.2a version) for our master thesis. On the Comsol webpage we've found an article of S. A. Conrad "Finite Element Analysis of...
View Articlewhy it is different between Axial 2D and 3D in Non-Newtonian Flow.
Hellow, i have used this for about 2 weeks. but i have some problems. so i need some help. i drawn a model of the cylinder which is same both them. and they are same values, boudary conditions... but...
View ArticleHow to define a mixture of two miscible liquids at the inlet?
Hello, I have a question about how to define a mixture of two miscible liquids (for instance water and ethanol) at the inlet. My 2D geometry is as follows: I have two parallel rectangles (representing...
View ArticleA 'net' like material - allows water to go trough but not particles?
Is there a possibility to define such a material? I want to do particle tracing a in fluid, but some of my walls require to allow water to go trough but to not particles ( or according to size..)
View ArticleModeling packed bed reactor
Hi I am a beginner of COMSOL. I would like to design packed-bed reactor. The reactor diameter is 1 mm, and the particle size is about 1 micro meter. The porosity of packed bed is about 60%. If I want...
View ArticleSolution for Time-dependent Solver - not working properly
Hi All, I seem to be having a difficult time solving a time dependent solution for any of my darcy flow porous media models. The problem I am encountering is that all the time solutions that are stored...
View ArticleModeling packed bed reactor
Hi I am a beginner of COMSOL. I would like to design packed-bed reactor. The reactor diameter is 1 mm, and the particle size is about 1 micro meter. The porosity of packed bed is about 60%. If I want...
View ArticleFree rotation of object in shear flow
I'm trying to simulate a 2D object (propeller shaped) in a shear flow. I managed to let the propeller turn and move the liquid, but I want to have the opposite: the fluid should rotate the propeller....
View Articlebuilding a multicomponent gas mixture in comsol
Hello All, I was wondering if someone could help me with building a multi-component gas mixture in COMSOL 4.2. I have my biogas composition of 66% CH4, 33% CO2 and 2% H2S and I need to define...
View ArticleError - 3D LID Driven Cavity Flow
Hello Forum, i try a computation for the "3D lid-driven cavity flow" model. I got a Comsol Error: Failed to find a solution. Divergence of the linear iterations. Returned solution is not converged. I...
View Article