Two-phase flow physics
Hi there, I have experience dealing with CFD problems with the finite volume method. I use my own code, starccm+ and openFOAM very often. I am trying to make some animations with a multiphase flow for...
View Articleelectrohydrodynamic problem
Hi all, I'm currently simulating the electromechanical effects of water droplets under both AC and DC voltages. The water droplet is placed between an energized and grounded electrode on an insulating...
View ArticleGeneration of thicker boundary layer mesh
Hello guys I wanna make some think boundary layer meshes. In my simulation, the boundary layer thickness delta is so big in that Re_x = 9.8 and delta = 5.0x/sqrt(Re_x). So I think the boundary layer...
View Articlewhat does the "exclude algebraic" error estimation option do?
I'm working on a time dependent convection-diffusion simulation. The Peclet number is 10^3 to 10^4. The maximum Reynolds number is ~100. The solution tends to diverge at a point where the input...
View ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View ArticleFluid flow with a moving solid object/hole
Hello, I would like to model the airflow in a room occupied with people, and to allow the people (cylinders) to move around in the room. Is this possible in COMSOL? For a silly example in 2D: I have a...
View Articlehow to assign conductivity to fluid flow in a microchannel preconcentration...
I am modeling a solution phase preconcentration in microchannel. My system has two inlets and one outlet. From inlet1, buffer (10mM) containing a negatively charged dye is supplied and from inlet2 same...
View Articlewater hammer
hello to everyone well I'm a student and hydraulic master2 I presonte memory of my study is to fain ^ ^ analysis of a battering ram in a pipe under COMSOL aep ^ 10 next joure. I have download COMSOL...
View Articleproblem hammer water
hello to everyone well I'm a student and hydraulic master2 I presonte memory of my study is to fain ^ ^ analysis of a battering ram in a pipe under COMSOL aep ^ 10 next joure. I have download COMSOL...
View ArticleFree and porous media flow 3D simulation - convergence issues
hey all, I was using the free and porous media flow module (fp) to understand flow distribution patterns in my system. in the 2-D form it was working pretty neat. When I scaled it up to a 3D problem,...
View ArticleHow to get a solution for EDL
Hi. I'm trying to solve the electric double layer structure using Nersnt-Planck eqn and Poisson eqn rather than Poisson-Boltzmann eqn. My domain is pallel plate of which height is nanometric, typically...
View Articlewhat does the "exclude algebraic" error estimation option do?
I'm working on a time dependent convection-diffusion simulation. The Peclet number is 10^3 to 10^4. The maximum Reynolds number is ~100. The solution tends to diverge at a point where the input...
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 ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View ArticleDe-icing of wing
Hi, I'm doing simulation of deicing of wing due to heating up sections of the leading edge of the wing. However, when I go through all the boundary set up and run the solution. I get an error:...
View Article2D Poiseuille flow, wrong solutions?
Hello all COMSOL users! I was solving a simple 2D Poiseuille flow problem on a rectangle domain. I use the "creeping flow" physical model with the "incompressible" option. And I just set the boundary...
View ArticlePlease help
Dear Sir, I am Rahul Prakash, a final year undergraduate in Chemical Engg Dept, Indian Institute of Technology, Bombay. As a part of my final year project, I'm trying to simulate the two-way...
View ArticleLiquid Encapsulated Capacitor
I think I should first start with "I am extremely new to COMSOL" :) That being said, I started working with it a little and now I can finally design a capacitor and have COMSOL calculate the...
View ArticleInitial negative concentrations
HI All, I am trying to simulate a A+B-->C chemical reaction. I dont know why my reactants (A and B) concentration is going negative. How do I fix this? I have attached my model as well as pic of the...
View ArticleInlet outlet mass flux is not identical
Hi all, I am trying to measure the bulk temperature, but initial testing on the conservation of mass failed as it gave me different results between the inlet and the outlet mass flux. This result makes...
View Article