Water droplet falling through air on a structured surface
Hi, Im new to comsol. I was trying to model a water droplet falling onto a solid substrate. The droplet should fall through air and then i should be able to calculate contact angles at various...
View ArticleEmpty parameter list
Hi everyone, I'm beginner to COMSOL and I'm modeling hyperthermia cancer treatment with magnetic nano particles. I'm using bioheat transfer for the body cells, mixture model for modeling nano particle...
View ArticleModel coupling to 2D to 3D geomety (General Extrusion)
hello all, I want to do a model coupling of 2D geometry and 3D. For this i used general extrusion coupling for that. I want to couple outlet ( along y axis) and inlet boundaries of 3D geometry through...
View ArticlePipe Model for heat transfer (Conjugate heat transfer)
Dear All, I solving the conjugate heat transfer problem. The problem definition is: In a shell and tube configuration, the heat transfer fluid is flowing in tube with some velocity and shell side is...
View ArticleDarcy Law using PDE
Hi, I'm trying to implement the Continuity Equation with Darcy law and the Energy equation using a PDE (base package). The Darcy equation in the continuity is u=-(k/mu)*d(p,x) where k is the...
View ArticleUsing Level Set Two Phase Flow (tpf) for any Solid Material Module
I want to model a two phase flow system where the phases will be Fluid and Viscoelastic (or any other Solid material) and also want to tack the interface using Level Set Two phase flow module. can any...
View ArticleFixed amount of confined fluids in presence of electric and magnetic field
Hi everyone, How can I apply electric and magnetic field on a fluid which is deposited on a plate and there is another plate at a some distance d apart from surface of liquid. (air above the fluid)....
View ArticleHow to change coordinate x to y in 1D?
Hi, Does anyone knows how to change the coordinate x to y in 1D model? I need to do an analysis of Darcy Law using the gravity effects (Buoyancy), but I couldn't rotate from x to y coordinate. Any...
View Articleimpose heat flux fluid/fluid Interfaces: laminar (tpf) and heat transfer in...
All, I would like to impose a heat flux on a 2D fluid/fluid interface. I have considered utilizing an equivalent volumetric generation using the delta function and even the tpf.Vfi function to turn on...
View ArticleCross Sectional Integration
Dear Fellows, I've got this problem since long time, and despite searching everywhere, I couldn't find the answer. The problem is a heat transfer with fluid flow coupled. I need to integrate over the...
View ArticleHelp with magnetic hydrodymanic simulation
Task: Simulation of magnetic nozzle effect. There is a plasma source with known gas pressure, ion-electron density and electron temperature. There is a magnetic system around the source. The task is to...
View ArticleDifference in 3D simulation of duct to rotated 2D simulation?!?
Hi everyone! I created a simulation for a circular duct which is heated by a constant heat flux. Does it make a difference to simulate a 3 dimensional geometry or a 2 dimensional geometry (rectangle:...
View Articlefree convection help
Hi! i am Joseph from Spain, and i am trying to model free convection in a closed solar module, which is basically a closed box. I downloaded your 2D headlamp , and i can see it is pretty similar except...
View Articlefree convection problem help closed box
Dear Ziv, I am Joseph from Spain, and just saw a comment you posted 3 years ago about free convection in closed space. Did you finally solve the problem? i know how to do it with external convection,...
View Articletwo phase flow combined with porous media
Hi I have a 3D model of a DMFC channel. The physics associated with this channel are: 1. Secondary current distribution Cathode side: 2. Transport of concentrated species 3. Free and porous media flow...
View ArticleMultiphase Stirred Tank
Hello! I'm trying to simulate a stirred tank of water with air bubbles in 2D Axisymmetric model. But, In the bubbly flow module doesn't exist the condition "sliding wall" Can you help me with this?...
View ArticleLaminar to turbulent flow transition
Hi dear Fhtagn, I would ask you if you have resolved your problem with laminar flow module and how did you find the transition Re ? Thank you, Mehrez
View ArticleCoupling Stationary fluid flow and transient solute transport to AC/DC module
Hello, I'm not the most proficient COMSOL user yet, and I have a 2D problem in v3.5a that would seem to be rather simple but has proven difficult to me thus far. My problem is as follows: I want to...
View Articletwo phase flow through a micro channel
hi i have a discussion about the two phase flow in a micro channel with constant heat flux at one side of wall my aim is to find out the transition point..ie the point where the liquid change its phase...
View Articlehow to set wall to free stream boundary condition
I'm doing simulation of the heat transfer of Fuel Cell, I have an exhaust fan on the outlet and the inlet is the hole between the stacks, due to the thousand hole of it, i would like to draw a air hood...
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