How to add inertial lift force, dean forces in particle tracing module?
Hi, I'm working on a curved microfluidic channel and trying to use it to separate two particles. However, when I use the particle tracing module, I could not find where to add the interial lift force...
View ArticleHow to add inertial lift force and Dean force
Hi everybody, I m doing simulation for inertial focusing. I need to see the effect of inertial lift force and dean force on particle. I m just wanted to know where these forces can be defined. I tried...
View ArticleProblem in 1D EHD simulation
Dear all, I have built a 1D EHD in COMSOL. But it does not work. There always exists an error. Can anybody give me any suggestion? Please help me! My *.mph file is in the attachment. The error is as...
View ArticleRelative error
Hello I need your help in Marangoni´s example (Marangoni Convection.pdf), follow the file exactly to the letter but it throws me an error when click on the study toolbar "Compute". The system...
View ArticleModeling gradual solidification
Hi, I'm trying to model the gradual solidification of cast-iron while modeling regions that are still solid, where stresses and thermal expansion still apply, and liquid regions, where the liquid can...
View ArticleThermal contact resistance
Hello, I'm trying to model a thermal sensor in contact with a solid. To do this, I need to embed a heat source in one material and then see the heat flow into a second material. I also need to account...
View ArticleOutlet boundary condition in comsol
Hi everybody I have set up a model in comsol 5.2 which consists of a capillary. On the outlet of the capillary, I want to impose a zero gradient for all variables except pressure? how can I do this?...
View ArticleForced timestep size for transient simulation
Hi! I would like to know, whether it is possible at all to force COMSOL to use large timesteps? I do not care about accuracy right now, I want to test a setup and have direct control over the temporal...
View ArticleAdvection and rotation of tensor property in fluid flow
Hi, I would like to use the mathematics module to define a tensor property which is advected and rotated by the flow of a fluid (Fluid flow, single-phase creeping flow). Physically, I wish to model the...
View ArticleMixing two fluids with static mixer
I'm attempting to model two fluids mixing through a static mixer. I'm using two Laminar Flow physics for each fluid and the Transport of Concentrated Species to get an idea for when it's fully mixed by...
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 ArticleRichard's equation
Hi, i want to simulate an injection problem. I have a fluid injected in a dry soil. The easiest way for me is to solve the Rachard's equation. The Problem is that I cant find the "Richar's Equation" at...
View ArticleUnable to model shockwaves in comsol
Hi all, I have been attempting to model high speed flow over a cone, however for some reason I cannot get a shockwave to form. The attached image shows the pressure contours at an inlet speed of 2000...
View Articleinverted mesh element -Two phase flow Moving Mesh
Hi all, I have a two phase model which I run it through Two phase flow moving mesh interface. I get inverted mesh element warning all the time. The first tip in the case of getting such warning is to...
View ArticleFailed to find consistent initial values
Dear all: I am trying to couple two phase flow and structure mechanics together. In case of generating the huge gap between the initial condition and boundary load ( also inlet), I have already include...
View ArticlePlotting relative concentrations of two two particle species of different sizes
Hi, I am modelling my microfluidic device and so far i have configured all the relevant physics needed to study the behavior. I have attained the electric field, voltage distribution plots etc....
View ArticleMixing two different fluids in fluid flow
Hi I have been working on a flow analyzer that has two inlet and an outlet. I have two fluids, one is very dense and the other is a very dilute substance, both of them are completely different and they...
View ArticleAppropriate Model For Atomic Beam Simulation
Hi, I am trying to figure out how to model the behaviour of an atomic beam being emitted from a reservoir into a vacuum system. I have the basic model created in the Free Molecular Flow module, and I...
View ArticleWhich interface choose for fluid flow with heat transfer
Good day! I would like to ask for an advice. I wish to solve the following problem: I have a plate of a solid material with low thermal conductivity. There is a pipe with cold water inside the plate....
View Articleinfinite element domain and air conductivity
Hi everyone, I’ve got two questions concerning the AC/DC module. I’ve worked with it for a while to simulate an AC multiturn coil in a frequency-domain study. It's located inside a water halfspace and...
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