problem with boiling, evaporation and heating
Hello people. I have problem with boiling and evaporation in comsol. I have vertical equipment. This equipment is divided in two parts. In first part is heating and part 2 is boiling+ evaporation. I...
View ArticleMolecular flow, how to calculate pressure inside domain ?
I have a model capillary and vacuum tubes that goes through a all the Knudsen number regimes. I have pumps and the gas pressure can vary 10^-5 Torr to 100 atm. But I am interested in the pressure only...
View ArticleBuoyancy Force
Hello everyone, I know that there was a discussion about buoyancy forces acting on a rigid body but i spent some time for solving this problem and I will appreciate if you help me about my situation....
View ArticleICP torh
Hello, I'm new user of Comsol . Can i modeling atmosphere pressure ICP plasma torch using Comsol? Typical value of pressure 1-2 atm. Typical value of power 10-500 kW Typical working area (geometry): 70...
View ArticleFlow and pressure Acoustics models
Hai is there any example model of flow and pressure Acoustics, to understand how pressure various when there is a constant flow, or heavy flow of liquids. thank you, taraka
View ArticleHow do I calculate volume flow rate with a thin channel approximation?
Hi, I have tried several ways posted in the forum to calculate flow rate in a microfluidic channel simulation. I can not get the right answer so I think I must be missing a detail. The model is...
View Articlefinite volume, volume of fluid, boundary integral method
Hello, I'm trying to model a cavitation air-bubble in water under ultrasound waves. For that I need to use a Boundary integral method to solve the Laplace equation. The finite element method I try to...
View Articleproblem with level set and heat transfer in fluids when used together
I have simulated the merging of two glycerol drops with one drop on a surface and the other one just touching it from the top. At first i used the laminar two phase flow level set physics just to...
View ArticleSpace variant boundary conditions
Hello everyone, I am modelling the combustion chamber of a biomass stove. For now, I aim to simulate just the fluid flows. I am using the non isothermal flow interface to model this(axisymmetric). My...
View ArticleFluid - Streamline - Shear Stress - Velocity - Spreadsheet
Hi everyone (first topic here for me) I would like to know if it is possible to export a streamline with for each point (x;y) associated the shear stress and velocity of that point. The idea is to...
View ArticleHow to determine when a Particle hit/touch a boundary in Particle Tracing Module
I am trying to model particle trajectory using Particle Tracing for Fluid Flow module of COMSOL 4.4. I am using Dielectrophoresis and Electric force. When the particle touch an electrode, I would like...
View ArticleElectrostatic Precipitator... Help!!
Hello I want to simulate an Electrostatic Precipitator. In conditions of laminar flow field and electric filed, it is requierd how many particles are gathered. However, in my simulation, the efficiency...
View ArticleHow to Model a Folating Body
I want to model a floating body on water. (geometry is not important) should i use two phase laminar flow (for water and air)? and fsi(for fluid structue interaction)? what can i do? help plz.
View Articleperistaltic pump
Hello, I have some question about peristaltic pump the model Comsol, "peristaltic_pump.mph (Model Library Path: COMSOL_Multiphysics / Multiphysics / peristaltic_pump) ". (a) The Comsol use this...
View ArticleSkin-depth meshing in a two phase fluid model of a cold crucible melting process
Dear Collegues, I'm actually working on a model of a semi-levitating cold crucible melting process. I want to predict the deformation of a metalic mass due to the interaction of EM, hydrodynamic and...
View ArticleHow to couple shear stress and moving velocity on the same wall?
Hi everyone! I am trying to add a shear stress boundary condition on a growing bubble wall, which should be a moving wall boundary condition. I used to add shear stress on a fix wall by slip wall...
View ArticleSpiral heat exchanger within shell
Hello, I have created a spiral heat exchanger within a shell, the file is attached for reference. I am able to solve for the respective physics separately but when I couple them together I am not able...
View ArticleAccsess value of variable solved for one domain from another domain
Hello, could you please help me: I'm solving a 2-D desorption of hydrogen in a metal-hydride. I created a cross-section view of metal tube 75% full of metal-hydride and have specified a hydrogen mass...
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
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