How to transfer quantities to another domain if two domains share a boudary
I have a porous solid and it is connected to the side of a pipe . The pipe will be defined by heat transfer in fluids and laminar flow The porous solid will be defined by heat transfer in porous media...
View ArticleCurrent density distribution on an electrode and cathode growth
Hi Everyone, I would like to look at current density distribution on electrodes in an electrochemical cell. I have the electrochemistry module. I have applied voltage boundary conditions on the top...
View ArticleRestricting the domain Temperature
Hello, I was trying to develop a 2D heat source model for a Manufacturing process.Its observed that due to Pulsed heat source the Maximum temperature in the 2D rectangular domain crosses 30000K, which...
View ArticleSource and destination function in General Extrusion Operator
Hi All I want to define General Extrusin Coupling from a curve to a region. The source is a curve (PRQ) and destination is the region (ABC-PRQ). Can someone help to define Source fuction and...
View ArticleModeling a Spiral Inductor Coil
Hello,Many of the blog posts refer to a toutorial on "Modeling a Spiral Inductor Coil", however, the link is not working,How i can get it?
View Articleheterogeneous reaction - concentration of product decreasing
greetings,i am currently working on a model of the hydrogen evolution reaction using the interfaces transport of diluted species, chemistry, and surface reactions. The reaction mechanism i am modeling...
View ArticleParticle size in Particle tracing module
Hello!I have a problem with the Particle Tracing in Fluid Flow (ver. 5.4). In particular, I want to set the diameters of the particles but changing the values (for example from 10^-9 m to 1m) I have...
View ArticleLarge wavelength to feature size mismatch: Limitation of COMSOL simulations?
Is it possible to simulate the interaction of a ~ 3000 micron beam with an object with 1 micron smallest feature size (currently using Wave Optics module)?I read that there are limitations of...
View ArticleResidence time in Free and Porous Media Flow
I am working on a project that requires me to find the residence time distribution of flow through a porous electrode. Due to the presence of other regions containing only fluid, I made the electrode...
View ArticleInternal error callback
Hi,Please let me know what is mean by internal error callback. Many times this error is coming for already solved models also.With Regards, Devaki
View ArticleFrequency domain vs wavelength domain
In the wave optics module (maybe also in the RF module), there is frequency domain study and wavelength domain study. Since there are simply relations between frequency and wavelength, what is the...
View ArticleErrors in simulating a glow discharge
Hello, Please can someone explain to me what this variable is?I don’t understand where the errors are
View ArticleI would like to solve an equation with the PDE interface in Comsol5.4.I use...
Hello, I would like to solve an equation with the PDE interface in Comsol5.4.I use coefficient form and wonder if the coefficients can be dependent on the same varaible the equation is solving for?So,...
View ArticlePort Boundary
Hello, allDoes the port in wave opticsabsorbs all the incident power ?for example, I have two periodic ports. Port#1 is ON and port#2 is OFF. The electric mode field amplitude of the port#1 is (0,1,0)....
View ArticleEffect of magnetic field and ultrasound
Dear Professor,We are students from the University of Nizwa. We are currently working on a graduation project. The topic of the project talks about ( development of pyrolysis media based on integration...
View Articlethe problem of "the plot is empty"
Hello,I was designing few electrodes with applying few voltage and try to get the potential curve distribution. But aftering performing calculate, there is some thing wrong, the warning is "the plot is...
View ArticleSurface Roughness- B parameter
Hello, I am currently trying to simulate surface roughness on the walls in my microchannel, and have read on several forums that the B parameter in the Turbulent Flow k-epsilon physics in the CFD...
View ArticleJH+HT+TS
Good afternoon. I ask you to suggest what is better to do in this situation I am trying to simulate the heating of a nichrome thread so that the heat that is released during the heating process is used...
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