heat balance with pipe flow module
Hello, I've tried pipe flow module at workshop, but I was unable to balance the heat flow through node. Is it possible? We wanted to simulate heat exchanger in the underground facility and we need to...
View Articlediffusion convection issues
Hi, I want to simulate the concentration variation of nano-particle in a micro-fluid channel under magnetic field, and to show nano-particle will build up in the region near the magnet. I have built a...
View ArticleSessile droplet
I want to put a sessile droplet inside a channel. How to create a droplet of a specific material ? and how do I choose the model ? As a reference I was wondering about the model in one the Paper - A...
View ArticleNavier-Stokes Simulation using Coefficient Form PDE
Hi: I need to simulate fluid flow in a triangular duct, but I need to run it on a high reynold number. The problem is that when I run the model using the default "Laminar Flow" physics tab, I need a...
View ArticleSmoke extraction from a building
Hello comunity!! I'm in a trial version of COMSOL to evaluate its acquisition. I want to simulate the smoke extraction from the building when there is a fire. I plan to start by simulating a room where...
View ArticleGravity flow from an atmospheric tank
Hello community!! I'm in a license trial of COMSOL to verify its capabilities to our simulation requirements. We have an open roof tank at the top of a hill; it is filled by a pipeline with constant...
View ArticleIs it possible to solve "Static Mixer" in coupled mode?
Hello everyone, I'd like to solve the "static mixer" example with coupled physics. In the other words, I want to solve both "particle tracking" and "fluid" physics simultaneously. In the current...
View ArticleBachelorthesis: Simulation of venting process of a liquid He pipeline.
Hello, I will do my thesis next semester, where I will use Comsol to simulate an emergency case at a helium pipe. Problem: The simulation will be about a double-walled helium pipeline. In the inner...
View ArticleHelp Needed - Lift and Drag for a Flat Plate, Normal to Flow
I am trying to determine the lift and drag coefficients for a 2-D flat plat ( 0.1 m chord x 0.0166667 m height ) oriented perpendicular to an air flow with Re of 10^4 using the Spallart-Almaras...
View ArticleLift- and drag coefficient on rotating cylinder in a uniform stream
Hi all, I'm trying to plot the lift and drag force on a rotating cylinder in a uniform stream (2D) for low Re=100. I've been successfull with calculating/plot the coefficient for the non-rotating...
View ArticleThermal Micropump
Hi all, I am trying to build a model of a PDMS micropump that pumps a liquid stored inside its reservoir due to heat. When the air inside it expands due to heat, the liquid will be pumped out. The heat...
View ArticleConvergence issues with level-set conservative form
Hello Everyone, I am trying level-set conservative form for droplet generation in flow focusing device. I have tried the following: (a) non-conservative form: it converges well but mass conservation is...
View ArticleWeak contribution to levelset interface
Dear all, I would like to add a weak contribution (for surface tension) to a moving levelset interface for the following application: I want to model a fluid with a free surface, on which there should...
View ArticleLocation of Mesh Stiffness setting in COMSOL v.4.3b
Dear All I am performing some FSI simulations and was looking for the "mesh stiffness" control options in COMSOL but was not able to locate it (google search led me nowhere). I need to ensure that the...
View ArticleCOMSOL simulation for heat and mass transfer across membrane for membrane...
Hi, For your information, I am developing a COMSOL simulation for the direct contact membrane distillation (DCMD) process. It is actually a process which involve the heat and mass transfer from the...
View ArticleHeat transfer, Solid Mechanics and Laminar Flow
Hi all, What are the required physics to be used when designing a micropump that works using heat? When the surface is being heated up, the liquid expands and pumps out. It should be noticed that the...
View ArticleChanging the material's Phase (state)
Hi, I am working on laser machining of metals and I am trying to model the process by COMSOL. What I have done is thermal modelling which shows the temperature distribution in the sample. I am...
View ArticleLaminar Flow Entrance Region/Issues
I am attempting to model a long square flow channel with laminar flow of air. I was wondering though if anyone knows exactly how COMSOL computes the entrance region for laminar flow, or where I can...
View ArticleSelecting Edges and Displacing Geometry. Also, Equations to Generate Geometry.
Hello, I am new to COMSOL, only have a 28 day free trial, and I need to model fluid flow. This question is really two part. One, I would like to build a nozzle that has two different diameters but with...
View ArticleBinding Outflow Concentration and Velocity to a Second Inflow
I'm curious if there is a way tell COMSOL to use the outflow concentrations and velocities of one channel/pipe for the inflow concentrations of a second channel/pipe. On the attached model, I want the...
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