inflating balloon
Hi I have a non spherical balloon fed by an inlet with constant pressure. How can I find the final dimensions of the balloon? thanks David
View ArticleProblem with transport of diluted species mass conservation
Dear Comsol Community, My model is a 2d axisymmetric geometry, composed by one fluid layer and many porous layers. I'm modeling both laminar flow and transport of diluted species. This chemical species...
View ArticleBoundary Condition: Open Boundary
Hello, I have a confusion with a Boundary Condition (BC), the "open boundary" under Laminar Flow module. If I give "No Viscous Stress" BC, the solver fails to find a solution whereas setting value of...
View ArticleUndefined value found error.
Hai , Can anyone help me to resolve this error while solving solid structural mechanics problem, What is NaN/Inf ? Error Message : Undefined value found. - Detail: Undefined value found in the equation...
View Articlemathematical modeling of iDEP
Hello Dear Alisha I am trying to model iDEP via comsol. I have used creeping flow and electric current modules in a stationary solver to model electroosmotic flow in an insulator based DEP micro...
View ArticleGeometry, Meshing, CFD Fluid Flow, Extrusion, Open Curves, and Solids
Hello, First, I am completely new to such simulation, have never used Pro/E, Solid Works, etc. Next, I am modeling turbulent fluid flow through a jet boat droop snoot and nozzle with proprietary...
View Article"Segregated solver steps do not involve all components."
Hi everyone, I hope if this has been answered before that someone can direct me to the thread. I am trying to solve a very simple system (attached) using electrostatics and solid mechanics. The...
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 ArticleConjugate heat transfer, Control Volume
Hi everybody, I'm trying to model heat transfer by convection using the conjugate heat transfer node. For doing this I need to model a control volume to represent the domain of the surrounding air. As...
View ArticleConverting Parametric Surface to Volume
Hello, I have data set of x y z data in excel. I used "interpolation" in the"global definition" and the" parametric surface" to create a surface geometry. I did this process to create two surfaces. Now...
View Articlecone-jet mode in electrostatic field
Hi, Here is my problem. I want to simulate a electrohydrodynamic (EHD) phenomenone , a nozzle with full water (or electrolyte) in a electrostatic field, the the water is polarized and deformed the...
View ArticleHow to stimulate flow with consideration of human cells.
Hi there, My friend and I are working on the generation of microfluidic device. And we have to generate the flow simulation considering the living cells (stationary in the device) inside the...
View Articlecomsol multiphysics
Dear Ivar My name is Konstantinos Karalis and I am a PhD student at the National Technical University of Athens. I am trying to solve the operation of an electric arc furnace combining the AC/DC, Heat...
View Articletransport of diluted species and laminar flow
Hi all! I want to simulate a cylinder moving in the water, and it can generate some species on the bottom of the cylinder. So the move of the cylinder will influence the transportation of the diluted...
View ArticleCatalytic Converter Simulation
Hi, I want to simuate the flow inside a catalytic converter in comsol. The diffuser and the nozzle are to be run with a Turbulence model and the honeycomb requires a Darcy's law flow field. How can I...
View ArticleFluid flow in variable zeta potential
Hello, I'm trying to simulate the velocity profile of fluid in a long and narrow column. For wall boundary condition I'm using "Electroosmotic velocity". I want to have variable zeta potential on the...
View ArticlePower Law Fluid Model
Hello all, I'm currently interested in using the Power Law Fluid Model for one of my simulations, however my PI does not have the resources currently to buy the "add-on" for version 4.3a. Is there a...
View ArticleFailed to find a solution. There are 1 void equations
Hello, I'm running a flow in a pipe and I'm using the Conjugate heat transfer physics. My model converges and gives me results when the fluid in the pipe is water. As soon as I change the fluid to...
View ArticleSimulation of heat pipe
Hi, I encountered the following errors at the "corner nodes" of my geometry while trying to compute. My boundary conditions are correct.The model runs fine with heat equation off.But when I include...
View ArticleParticle tracing module. Latent heat
Hello, I would like to simulate velocity, trajectory, temperature and melting small particle of silica (<500 um).I use particle tracing module and non-isothermal flow module. Particle temperature...
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