Pressure Drop in a Muffler
Hello I need to calculate Pressure Drop in a Muffler (3D), i tried to use the Discharging Tank model that uses the Pipe Flow Module, but it seems i can't use a pipe within a pipe (trying to simulate...
View ArticleFluid across cylinder with heat source
Hi! I am doing a small project about an heat exchanger. First I should study the Reynolds number effect and the vortex shedding. I already have some results about that (I should be able to calculate...
View ArticleFree Surface Modeling
Hi all, I'd like to model a sphere dropping into a tank of fluid. Does anyone have any suggestions about how to do this? The main focus is when the sphere hits the fluid, how the free surface reacts...
View ArticleHow to couple turbulent flow and porous flow?
Hi, I want to calculate the compressible & turbulent flow and heat transfer in porous media. Here I have two questions. 1. How to couple the turbulent flow and porous flow? 2. I want to consider...
View ArticleWater 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 ArticleTrouble coupling heat transfer physics for both fluids and solids
Hey all, So I'm getting stuck with my model where I try to couple three different physics. The three physics are: Electric Currents, Heat transfer in Solids, and Heat transfer in Fluids. Basically what...
View ArticleWeak Constraints from COMSOL 3.5 to 4.2a
Hi I have seen many posts regarding this but none had any definite answer. I am trying to follow a tutorial which involving Stoke's flow, and have the following problems: 1. "Go to Properties of mmglf...
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 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...
View ArticlePressure Drop in a Muffler
Hello I need to calculate Pressure Drop in a Muffler (3D), i tried to use the Discharging Tank model that uses the Pipe Flow Module, but it seems i can't use a pipe within a pipe (trying to simulate...
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