Boundary condition setting problem for electrode
Hi! I am using transport of diluted species to simulate particle movement in discharge but have some problems with the boundary condition setting for the electrode: the electron move towards the...
View ArticleDEP particle tracing for fluid flow COMSOL 4.3 simulation
Hi, I've tried to simulate dielectrophoresis by using the particle tracing for fluid flow module of COMSOL 4.3, but I' ve encountered some problems with the dielectrophoresis force. I am trying to...
View ArticleWelcome to a new forum!
Welcome to The COMSOL Discussion Forum. The goal of the COMSOL Community section is to improve the community experience through increased communication, fellowship, and inclusiveness. It is a place for...
View ArticlePoisson Nernst Planck and Navier Stokes equation
Hi everyone, I am trying to simulate the electro-osmotic flow in a nano-channel using the Poisson-Nernst-Planck and Navier-Stokes equations coupling them from the Electrostatics,Transport of dilute...
View ArticleHow to Couple Free and Porous Media Flow with Heat Transfer In Solids
Hi Everyone, I am new to COMSOL and I am trying to simulate a solar panel cooling system. I am trying to simulate in 2D the heat transfer between a thin rectangular layer (the photovoltaic cell),...
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 ArticleVarious Problems for Two Phase Flow coupling with Electrostatic
Hi! I am working on Two Phase Flow coupling with Electrostatic using transient (phase initialization and time dependent) solver to simulate electrospray phenomenon, I have encounter some problems and...
View Articlecone-jet mode in electrostatic field
Hi, Here is my problem. I want to simulate a electrohydrodynamic (EHD) phenomenone , a nozzle with full water (or electrolyte) in a electrostatic field, the the water is polarized and deformed the...
View ArticleInconsistent uni-directional constraint with Conjugate Heat transfer
I am trying to model a simple high temperature hydrogen heat exchanger with the conjugate heat transfer module. While I have been sucessfull in modeling individual tubes of the hydrogen alone, I cannot...
View Articledefine velocity boundary condition at membrane surface
Hi, I need to define velocity boundary condition at the surface of membrane that is permeable. do you have any suggestion? Thank you.
View ArticleHow to calculate the normal heat flux on a boundary
Hi everyone. I´m a beginner with COMSOL and I don’t understand how it calculates the normal heat flux on a boundary. In order to evaluate how to derive values in the Results section, I have followed...
View ArticleWater flow in a PVC pipe to measure impact of water pressure on it
Hello, I'm the beginner of Comsol Multiphysics. I wants to pass water though a PVC pipe. I have used a straight pipe using Turbulent Flow, k-ε. In geometry there are two domain one for water, another...
View ArticleConvergence problems
Hi there, Could any one give a hand? I have no idea what is happening with the solver or the model. I am trying to model a laminar flow without any other physics. The default plots during solving...
View ArticleResult of the solution not equivalent to the initial boundary setting
Dear Sir Nagi Elabbasi, A pleasant day to you Sir. I would like to consult this problem that I'm having at the moment thinking that you can help me with this matter. Presently, I am doing a 3D...
View ArticleError in Two Phase Flow
I am using the Level Set Method in Comsol. When I am using the Time dependent solvers I get the following error- Failed to find consistent initial values. Last time step is not converged. The same...
View Articlecoupled application
This is kumar,can anybody help me to implement the coupled application about electromagnetic flow meter to solved the flow rate analysis- for analysis this device i have a some clarification also, 1....
View ArticleInternal error in piecewise expression evaluation
Merry Christmas everybody, I was simulating a laminar flow in a heated circular duct with a non-newtonian Fluid. In order to describe the dynamic viscosity I used the non-newtonian power law with the...
View ArticleSimulation of a heated mixer
Hi everyone, In a school project, we are trying to simulate liquid mixed and heaten. We have simulated the heating, which works. However, when we're trying to simulate the mixing, it always fails. To...
View Articleheat transfer in fluids time dependent error
Hi My problem combines laminar flow and heat transfer in fluids. It runs OK in stationary mode. It runs OK also in either time dependent flow or heat transfer . If I try heat transfer+flow in time...
View ArticleFluid flow - solid body rotation coupling problem
Dear all, I am working on a 2D model of a turbine subjected to air and to do this I guess I need to use laminar flow and ale. Also solid mechanics to define a free to rotate connection. What I want to...
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