Weak Constraints from COMSOL 3.5 to 4.2a
Hi I have seen many posts regarding this but none had any definite answer. I am trying to follow a tutorial which involving Stoke's flow, and have the following problems: 1. "Go to Properties of mmglf...
View ArticleQuestion about your paper on liquid metal deformation
Dear Ivar , I am currently working on the subject "Liquid metal deformation by means of magnetic pressure". I have done the theoretical approach and experimental validation and to conclude this...
View Articlehow to get true dimensions for using interpolation function in the other model?
Hi, I want to ask about using boundary conditions as a result. I found many discussions in the forum and I applied to my model. I segmented my model three parts and I want to use results on the other...
View ArticleHow to find the length or surface area of the interface in level-set method...
Hi, I need to know the surface of the interface. I am using the level-set method to track the interface of two fluids and I need to know surface area of the interface at each time step. Is it possible...
View ArticleFailed to find consistent initial values.
Hi. I coose frekvenci transient study and get thise error. Failed to find consistent initial values. Last time step is not converged. THANK
View ArticleConvergence issues with level-set conservative form
Hello Everyone, I am trying level-set conservative form for droplet generation in flow focusing device. I have tried the following: (a) non-conservative form: it converges well but mass conservation is...
View ArticleDeposition rate using particle tracing module
Hi I have modeled a reactor using the "fluid flow" and "particle tracing module". A substrate wafer is placed across the flow channel. I have implemented the boundary condition so that whenever a...
View ArticleEmpty parameter list
Hi everyone, I'm beginner to COMSOL and I'm modeling hyperthermia cancer treatment with magnetic nano particles. I'm using bioheat transfer for the body cells, mixture model for modeling nano particle...
View ArticleReacting Flow in Porous Media
I am working on simulating a flow through a channel which is adjacent to a porous media which functions as an electrode to oxidize the electroactive species in the electrolyte (think fuel cell or flow...
View ArticleSimulating a rheometer
Hi Everyone, I'm a bit new to Comsol so sorry if this is a dumb question. I'm trying to simulate a rheometer in my lab. It's basically a cone in a petri dish. For simplicity I'm using 2-D and have...
View ArticleTracking Residual
I need to track the residual in my simulation in order to represent how closely the governing equations are being represented. I know comsol keeps track of residual since ive had several errors...
View ArticleHow to simulate the water boiling by Level-Set method
There is a good example simulating water boiling by phase field. I am trying to use the Level-Set method. However, I was frustrated by many times of failure. My problem is how to deal with the...
View ArticleQuestion about model ID:9408
Dear Friends, I was checking model id 9408, it's vibrating beam in fluid flow, my questions: 1- I like to have Sine vibration for beam, I replaced point load in this model that it'a Gaussian pulse with...
View ArticleLaminar outflow boundary condition does not converge!
Hello everyone, I am new to this programm and want to simulate the first part of a streamed circular duct. It serves as an hydrodynamical entry length to develop the velocity flow profile. In the...
View ArticleCan I access each cell's residual
Hi, I was wondering if it is possible to access the flow residuals from a UDF? I need to be able to access the momentum and continuity residual for every cell in the computational mesh. Thanks, Farid
View ArticleForced convection - horizontal flow against a plane sheet with a blunt edge
Hi folks, that's my first time I'm working with COMSOL MULTIPHYSICS and I'm trying to simulate a horizontal flow against a plane sheet with a blunt edge. I use convective and conductive (cc) and...
View ArticleIsothermal contour normal vectors
Hi All, Background: I am mapping the temperature gradients at the solidification front of a laser generated melt pool. However the gradients need to be measured in the direction normal to the...
View ArticleSimulation of Stirling Engine
Hello everybody I'm currently trying to simulate the fluid flow in a stirling engine (beta) which I've built from the following video:www.youtube.com/watch?v=X2qssmxA82U You should try building it;-)...
View Article3D simulation of drop coalesnce
I am try to solve the two drop coalescence by applying the two phase flow and phase field method in comsol. 2D it solve the problem very accurately. but 3D is not. kindly suggest any modification need...
View Article3D electrocoalescence with multiple inlets
Hi I have based my simulation on the electrocoalescence example except I have two phases coming in at the inlet. As such I have defined an explicit boundary selection for each inlet phase and have two...
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