Pipe Flow-multifluid distillation
Problem consists of 1 inlet pipe with high viscosity fluid. Through distillation process oulet pipes conists of fluids of different viscosities and densities. Has anyone handled this type of problem?...
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Hi, I have to simulate a problem : A highly viscous liquid is moving with a certain velocity and we are passing a cooling gas, over the surface of the liquid,to see the cooling effect and observe the...
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Hello, the velocity gradient tensor for a 2D-axisymmetric problem presents, for the phiphi component, the following expression chns.graduDGphiphi = if(abs(r)<0.0010*h,d(u,r),u/r) does anyone know...
View ArticleSurface evaporation, condensation
Hi, I want to model surface evaporation from a water flow at 40 Celsius and observe the consequent condensation on a cold surface. Can you help me with the model that I should use? I could not find...
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Hi there, I am doing COMSOL simulation to see the behavior of a particle flow through a microchannel. There is a area of the channel where particle size is greater than the cross section. So the...
View ArticleConvergence behaviour in a stationary solver
Dear Comsol gurus, I have been dealing with a CFD/transport of diluted species (TDS) simulation for a while and I was hoping you could bring some light to the subject. I am simulating a flow in a micro...
View ArticleFluid flow channel in cantilever beam
Hello, My model is the following: a cantilever beam has one longitudinal channel containing a fluid flow. My goal is to find the effects of the fluid flow (viscosity, velocity, size of the channel) on...
View Articleold model cannot be reconstructed....
I am attempting to build on a model using Darcy's law to model solute transport under saturated conditions. The original model was built in COMSOL 3.5a, and I get an error message "Old model cannot be...
View ArticlePeristaltic Pump Model
Veryst's peristaltic pump model is practically identical to what I need to create (designing a muffin batter pump and would really like to model it)! Unfortunately I'm a student so I can't just hire...
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 ArticleAssigning material properties to an interior volume
I want to assign the empty volume within a closed container to be a fluid and assign material propertied to this fluid. I imported a closed 3D model that is made up of a number of solid parts contained...
View ArticleDifficulties with #985 Peristaltic Pump Model
Hi All (bear with me; I'm new) Working my way through the peristaltic pump tutorial and all has been a-okay thus far but once I get to the plot of the total volume (bottom of pg. 14) when I try to...
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 ArticleFlow dependence on coordinate system?
I am working on modeling fluid structure interaction, and I have found that the flow changes whenever I move my model to a different location on the coordinate system. I literally selected everything...
View Articleheat exchanger
Hi Im trying to model a heat exchanger under Conjugate Heat Transfer module but i got an error. I attached the file. Would you please look at it and let me know where is my problem? Regards
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I have a 2D rectangular geometry that has porosity and permeability values dependent on x-coordinate. Polynomial expressions are used to define the local porosity and permeability. However, COMSOL does...
View ArticleSegregated Solver
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View ArticleWhile Loops and Converge Criteria for pseudo steady state model
Hello, I am attempting to create a series of simulations whose aim it is to examine the influence of my model's physics on the models geometry. What I have is a vascular geometry , which has a certain...
View ArticlePipe Flow-multifluid distillation
Problem consists of 1 inlet pipe with high viscosity fluid. Through distillation process oulet pipes conists of fluids of different viscosities and densities. Has anyone handled this type of problem?...
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