Two boundaries in contact - one takes value from another
Hi, Does anyone know how can one boundary, say B, which is in contact with another boundary (say A) takes the output values from A? To generalize, we input something to and the results appear on A....
View ArticleNusselt Number Calculation
I am trying to calculate the average Nusselt # over a flat plate vs. Reynolds #. Thus I need to take the average of the derivative of temperature in the y direction at the plate for the various...
View ArticleMeshing of boundary layers wont work
I am trying to mesh (and, eventually, compute) a model of a rectangular duct connected to a circular hole, where the duct and the lower part of the hole are filled with water, the upper part of the...
View ArticleMeshing issues - boundary layers
I am trying to model fluid flow up through the inner lumen of a tube, then laterally through pores in the tube wall, and then up through a ring-like channel boardered by said inner tube and another...
View ArticleHow to assign a 2D random function as porous matrix property (porosity)
Good morning, I really need your help, because I can't find anything in the help files. I have a model using the the Brinkman Equations module for 2 dimensional porous media flow. I want the porosity...
View Article"Internal error in boundary respecting." and "Out of memory during assembly."
Dear All I have two errors in my microfluidic models about "Internal error in boundary respecting." and "Out of memory during assembly.". At first I tried to simulate the flow of the overall 3D...
View ArticleNatural Convection with buoyancy force in air box
Hello Yoav, I am struggling on modeling natural convection in a air box and I saw that you gave the most detailed helpful answer to this type of problem on COMSOL discussion Forum. I will be so...
View ArticlePossible to export the streamline coordinates?
Hi, I am only using the laminar flow conditions, I have plotted the streamline after the simulation, is there anyway to get the streamline coordinate from the simulation? I like to export it if it is...
View ArticleTrying to set up a model for testing shock survivability
Hello all. I am designing a silicon suspended structure that will withstand more than 30,000 G shock. I am having trouble setting up the problem. I was looking for some examples that might be similar...
View Articlemodelling elatic-water interface in Solid Mechanics model
Dear all, I am trying to model a cylindrical phantom which is placed in water under acoustic radiation force. The acoustic radiation force is loaded as a 'body load' which works fine. However my...
View ArticleCoupling 1D Pipeflow to 2D axisymmetric Porous Media
I am working on coupling 1D pipeflow to 2D axisymmetric porous media. The coupling is peformed by averaging the 2D boundary to the 1D point and integrating the 1D point to the 2D boundary. The coupling...
View ArticleMHD
Hello. Does anyone advise me where to be found magnetohydrodynamic model in comsole? Thank you.
View ArticleModeling endovascular ablation
Hi, I am trying to model endovascular ablation. I checked the video tutorial on tumor ablation, and used some tips from it, but in my case, I also have a laminar (blood) flow within the vessel. My...
View Articlelaminar flow in tube
Hi iam new to COMSOL i want to design flow in tube and valve to obstruct in the end. By changing the valve positining i want to simulate the strain distribution on the surface of cylinder(tube) can...
View ArticleProblem with heat transfert in lava
Hello everyone, I posted a topic here because I encounter a problem with Comsol. Indeed, I try to modelize a lava flow, but I have a problem to fix the temperature of middle flow as you can see on this...
View ArticleContinuity equation and momentum equation
Hi.. i'm new in comsol.. i'm doing 2 d simualation of wind passes through the hill by comsol multiphysics 4.2. May i know, did i need to specify momentum and continuity equation (ux+vy=0 and...
View Articlehow to plot velocity profile within a pipe elbow
Hi, Can anyone please guide me as to how to do I plot the velocity profile across the geometry which consists of two pipes and a 90 degree bend in between them. I have attached my model for reference...
View ArticleTwo boundaries in contact - one takes value from another
Hi, Does anyone know how can one boundary, say B, which is in contact with another boundary (say A) takes the output values from A? To generalize, we input something to and the results appear on A....
View Article1 physics or 3 physics (turbulent laminair flow)?
Dear all, I need to simulate a situation in which I have two different streams of air seperated by a thick solid. One stream is clearly a laminar flow the other is clearly a turbulent flow. Now is my...
View Articledifference between d(P,x) and PTx
I use the thin film flow module (with reynolds equation) to create a journal bearing model. My question is : what's the difference between d(P,x) and PTx ? Because d(P,x) is the differentiation of P...
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