Error in modeling a fluid flow and heat transfer in a 3D box
Hello COMSOL Users and Sir Amir Fadil and CFD Experts I am trying to simulate a 3D NITF Problem by heating up the air inside a box and observe the thermal transfer and fluid flow. The material...
View Articlestability of slopes
sir i wish to start a model on slope stability. can you please help me. i want to know how to proceed with the physics part and which properties among these i can show- plasticity, friction, elasticity...
View ArticleBoundary Condition at PML
Hi I am bit confused with the BC for PML. For example I have a resonating disc attached to a substrate. Now The substrate is assumed to be fixed. It's a 2D axisymmetric problem. Substrate is surrounded...
View ArticleComparison of Comsol versus Ansys
Hi, I am doing my master thesis and I need to make comparison of Comsol and Ansys. My master project is focusing on heat transfer interface. Still I am using the Comsol, because for me it is more...
View ArticleError on simulating Lithium-Ion tutorial
Hello, i was trying to do the tutorial of simulating a 2D lithium-Ion battery (www.comsol.com/showroom/gallery/9981/), b ut when i try to execute my simulation i get the following errors: Failed to...
View ArticleHow to implement a recursive function (in time) in COMSOL 3.5a?
I have a multiphysics problem, where I have a coupled, PDEs, and and one of them needs the viscosity to be updated. The updating formula uses both the concentration of a substance (from the transport...
View ArticleBirefringence
Can any one help me to provide the answers of the following questions. 1. Provide a detailed physics on the pitch dependence of birefringence. 2. Please provide a detailed physics behind the increasing...
View Articlehiger order modes
How could i find the higher order modes using comsol 4.2 version. Samiul
View ArticlePacked bed mean field model
Hi, I am trying to solve the time-dependent concentration profile in a packed bed using the mean field theory rather than the whole CFD definition of the problem. The mass giving rise to the...
View Articlethin layers
Dear all, I am analysing the waves induced inside a thin layer using a shaker. I apply a sine wave on one of the edges and the analysis is in the time-domain. I am using Comsol v4.0. Altough I am using...
View ArticleCOMSOL Conference Boston 2013 - One month away from Early Bird Abstract...
Hello, I hope you are as excited about the upcoming conference season as I am! As a reminder, the Early Bird Abstract Submission Deadline for the COMSOL Conference Boston 2013 is June 21st, exactly one...
View ArticleContact penetration
Hi I have a contact model and there are two domains that one moves with a prescribed displacement and presses down the other one. I have a contact pairs, but the results seems like one domain...
View ArticleBuoyancy in Water
Hi I want to model buoyancy effect of a solid in the water, which solid's density is less than water (hypothetically). How can I model it? Which MODEL should I use ? is any special trick or something?...
View ArticleArrow color
Hi, all I plotted principal stress volume. So, I have three color arrows; red blue green I know that they represent the eigenvectors of stress tensor. What I want to know is their eigenvectors' color...
View ArticleModeling a Kerr Effect
Hello. I want to model a material with birefringence that depends on the electric field inside the medium, similar to the Kerr effect where the index depends on the square of the field. This is...
View ArticleHarmonic Load
Hey, I'm new to COMSOL and I have a few questions about it. I'd like to do a Frequency Response Analysis of a structure with a harmonic load ''shaking'' it with a pre-determined force and frequency ,...
View Article"zero length" element
I am trying to model a bolt connection in an assembly. In order to do so I would like to place a node at the center of where the bolt hole should be (all bolt hole cutouts have been eliminated) and...
View ArticleIncorporating Lagrange Multipliers
Hello again, Thanks to the help of those on the forum I was able to incorporate weak constraints to get accurate flux calculations in my diffusion models. However, I am trying to understand how exactly...
View Articlemodeling of airlift reactor
Hi everyone, I have building a model to simulate airlift reactor for vaccine production. I had following the "modeling of airlift reactor" in model library COMSOL but I can't input mass balance to get...
View ArticleCOMSOL APPCRASH and closed
hi I have a problem for the new server computer using COMSOL 4.3 First of all, the performance of server computer is below. OS: windows 2008 server RAM: 512GB CPU: AMD 6238 (x4) GPU: Geforce GTX 550 Ti...
View Article