strouhal
hi,how I can calculate strouhal number for a circular cylinder in the laminar flow?
View ArticleNon-Newtonian models in COMSOL
HI, I am re-posting this as I didn't receive a lot of attention last time. I have only seen Carreau and PowerLaw models for non-Newtonian flows in COMSOL. However, I want to implement a different...
View ArticlePhase Change + Flow
Dear All, I need to simulate a tank filled with Phase Change Material that is heated by circulating hot water through a pipe inside it. I am using COMSOL 4.1. What kind of physics would you recommend...
View ArticleCOMSOL error
Hi, When I do the coupling calculation for laminar flow module and transport and diluted species module (concentration), it always shows an error: Undefined value found. - Detail: Undefined value found...
View ArticleMotion of a Deformable Solid in a Fluid
Hi there, I want to study the motion of a deformable solid in a fluid; the red blood cell's motion in a capillary. I don't know if COMSOL is a good choice for this kind of problem. I would be grateful...
View Articleimposing changing boundary condition based on a point inside the geometry
Hi, I have a 3D model solving Richards equation, (my goal is to catch the behaviour of a floodplain which is inundated periodically) How is it possible to impose a boundary condition( for upper...
View ArticleCoupling two physics
Hello I want to simulate a heater which transfer temperature to a reservoir.which physics is needed for this simulation? also how to couple these physics? Any suggestion, reference, tutorial, or...
View ArticleHow to simulate mixing of two fluids with different density
My question is: How to simulate mixing of two fluids with different density ? I have a geometry with two channels confluents into a third channel. Waters with different density are entering in each...
View ArticlePlease help me to find which stress is supported by the solid phase in the...
Hi there, I questioned yesterday but the discussion is deleted because I reply here using another language. I want to know the difference between of the expression “pf” and “poro.pm” which are both...
View ArticleRegarding boundary size for natural convection
Hi all, I am simulating natural convection. I have tried many boundary sizes, infinite boundaries but they give different results. What size does the boundary have to be in this kind of simulations....
View ArticleWettability and filling of small channels, nano to micro range and
Hey everyone, I'm trying to get an estimate using simulations for a microfluidics (or nanofluidics) problem. The problem is as following, there's a very narrow channel or slot if we run a fluid like...
View Articlerigid particle carried by a channel flow
Hi I have to simulate the displacement and rotation of a rigid prticule in a fluid flow and I am not a professional on comsol. So, is there anyone who could help me? or if you have any examples of this...
View ArticleClogging in pipe and nozzle
Dear All, I am a novice user. I would like to simulate clogging in pipe and nozzle. The cause of clogging is solid particle inside the fluid which deposits along the pipe and the nozzle tip. Do you...
View ArticleMultiple-size particle tracing
Hello everyone I have a short question on the particle tracing module. Does anyone know that whether it is possible to simulat particles of different sizes in the same model. How to implement this...
View ArticleStrange boundary artifacts for two phase level set model
I built a model to investigate the case that viscous fluid from a pipe deforms on a horizontal surface. In the 2D axisymmetric model modified from the level set nozzle inkjet model, viscous fluid from...
View ArticleHello~~ I encounter some problems when modeling corona wind
Hello~ I was modeling ionic wind, and I had some problems on it. I selected AC/DC, and PDE module for simulation. My model is a rectangle 2D domain which represents inner section of pipe. There are two...
View Articleslip length (Navier bc) with iterative solver in Stokes equation
Dear Comsol community, I want to solve the Stokes equation with a Navier bc on one boundary. (slip velocity = sliplength * du/dn, with n the normal on the boundary and u the tangential flow velocity)...
View ArticleCOMSOL for CO2 flooding for EOR
Did anybody do a model to simulate EOR by CO2 injection? Using compositional model. tks
View Articlehow to make a geometry move along in a circle
Im trying to generate a simulation the will give me a pressure profile of cylinder that moves around in a circle (not simply a rotation, but actually traversing the circumference of a circle. I have my...
View Article"Clogging effect" in particle tracing for laminar flow
Dear All, Anyone knows how to simulate the clogging effect of nozzle by using particle tracing or any other modules? Thank you in advance Best Regards, Yannapol S.
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