Laminar flow module in Comsol 4.3a
Hi, everyone, I am using laminar flow module in Comsol 4.3a to model Navier-Stokes equation. My question is how I should add the body force term F into the equation? The term F is listed in the...
View ArticleBoundary condition in laminar flow, Failed to consistent initial value
Hi any body; I have an static flow at initial time on the solid surface. After t=0; I should exert an external force to the fluid bulk so in this situation my fluid has a motion. Here because the down...
View Articledefining temperature of inlet fluid?
Hi How do I inject a fluid with a required temperature through an inlet? Obviously it's temperature needs to be different from the initial fluid in the model . thanks Dave
View ArticleHeat Transfer rate with electric Current
Dear All, I want to see the heat transfer characteristics in a steel tube using water (Laminar Flow). Please advise how can i insert electrodes in the water. I mean modelling and calculating Heat...
View Articleheat transfer in fluids with phase change
Hi I have a heating element with defined power in a kettle with water. Any ideas how to model time dependent heat transfer ? Thanks David
View ArticleTime dependent study with Transportation of Diluted Species in COMSOL
Dear All, I am simulating transportation of target molecule to bind with probe molecule in a particular spot in flow system. I can see the increasing of the concentration of complex occurring from...
View ArticleSyngas Combustion in a Round-Jet Burner with comsol 4.3
Hi everybody i want to reproduce the problem "Syngas Combustion in a Round-Jet Burner" with comsol 4.3, this problem has been solved with comsol 4.4, but ! I don't know how to couple reacting flow with...
View ArticleHow to model multi domain system in Comsol 4.4 ??
I want to know how to model multi domain system. I want to model adsorption cycle which consists of evaporator, adsorption bed and condenser. How can I model these domains? Also the cycle is operating...
View ArticleError in geometry buildup when running a comsol model as an m-file within a...
Hello all, I've been working on this for a little whiles and I was wondering if anyone could perhaps shed some light on my issue for me. I have a model which I run on COMSOL with no issue. Yet I wish...
View ArticleSlip-flow modelling
Hi, I am thermal transpiration using the slip-flow module but I am having trouble with the flow continuity. Essentially, I have a series of reservoirs and thin capillaries connecting the reservoirs but...
View ArticleWetted Wall BC
Hi, What are the equations for wetted wall boundary condition in COMSOL ? I can not find it. I want to know what exactly happens when you set the contact angle. Is COMSOL using the Navier Slip Length ?...
View ArticleHow to create blood cells with different cell parameter
Hi... I am student of Biomedical engineering and very new in comsol. In order to complete my final year project, need to study on separation of red blood cells from whole blood by using magnetophoresis...
View ArticleNon-Isothermal flow module issues
Hi, I am trying to model a single channel of a typical pressurized water reactor, considering three physics, the point kinetics model for the calculation of energy generated inside the fuel pellet, the...
View ArticleMelting Front and Free Surface
Dear all, I'm currently attempting to build a model similar to the "Tin Melting Front" in the model library. This model describes the melting of a metal through the Stefan problem and models the...
View Articlehow to choose model between 'Fluid Flow' and 'heat transfer' for a simple...
i am doing a basic simulation for heat transfer through convection. I wish to learn about as on how to choose between various models in "ADD PHYSICS" like heat transfer. fluid flow..
View ArticleComsol Working group (Geodynamics and Earth Science)
Hello everyone, My name is Rémi and i am a PhD student of the Geophysic department at Uppsala University. My project during those five fallowing year will be to study the origin and evolution of the...
View Articlepointwise constraints
I am wondering if someone can explain what pointwise constraints are. When should I use them? The most important thing I want to know is, what does it mean to use pointwise constraints with an equation...
View ArticleTrichlorofluoromethane (Freon 11, CFC 11, R11 ... )
Hi, I'm calculating the propagation (both status, liquid and gas) of Freon11 in porous media. We built a very etherogeneous aquifer system and we have calibrated our Darcy Low physics in a previous...
View ArticleChemistry in Mixture Model Interface
Hi, I have a simple model in which I am simulating sedimentation using the mixture model interface turbulent in a pipe. I am using solids dispersed in liquid. I input the solids volume fraction,...
View ArticleOil filter simulation
Hey All I am currently looking into a simulation/verification model of an oil removal filter. I have a gas with small oil droplets/particles in it. In the real world application the gas is passed...
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