Cut-off wavelength of step index fiber
Hello all,I am trying to calculate the cut-off wavelength of SMF-28 in COMSOL. Could anybody suggest how to do it?Thank you,
View ArticleDefining a surface variable on a domain?
Hello, I'm attempting to define the reaction rate of a bulk species involved in an adsorption reaction in Transport of Diluted Species. I am also using Chemistry and Surface Reactions. I would like to...
View Article2D simulation on ZY plane
Hello, I would like to simulate piezoleectric stack of AlN with electrodes on top and and bottom. So, the d33 component of the AlN is what I am observing. However I want to simulate in 2D (not...
View ArticleTime Dependent Study over Months/Years
I am currently simulating the effects of thermal stress on an underground power cable and I was wondering if anyone would know how I could set the time of the study to be over months/years instead of...
View ArticleCOMSOL5.4a won't start on fresh Windows 10 installation
Hi, friends, When I installed comsol5.4 on my newly installed Windows10 operating system, I ran into the problem: 2020-03-28T12:47:31.486+08:00 Using locale: zh_CN 2020-03-28T12:47:31.982+08:00...
View ArticleStress or strain on a boundary
Hello,I'm trying to find out what the effect of 'holes' in a hydrogel is on the modulus of that gel. For this reason, I simulated the gel in 2D as a square block. On this block, I want to apply a shear...
View ArticleMicro fluidic sensor
hi sir,is it possible to measure the liquid pressure in micro fluidic channel by designing a pressure sensor using comsol?
View ArticleHorn Antenna Simulation - HELP
Hello Everyone.I'm an engineering student and I'm new in the COMSOL world. I am trying to simulate the behavior of a Horn Antenna. I set up my geometry, materials and physics quite a while ago and it's...
View ArticleUnbounded domain
Hello,Physics in which im working is Heat Transfer in Solids and Fluids. I successfully imported 3D geometry of my problem into Comsol. I added materials to every domain, and added power losses to some...
View ArticleManual modification of the RF Module equation
Good night:Is there any way to modify the Electric displacement model manually? I am using the RF Module to analyze periodic structures, however, according to the literature, the relative...
View ArticleHow to set fracture parameters in the module of Structural Mechanics？
Hello, My name is crystal. How to set fracture parameters in the module of Structural Mechanics？I want to do the research about the stress distribution around the borehole, thanks.
View ArticleWhat is meant by the error "DAE is structurally inconsistent"?
I am trying to model a 2 D nonequilibrium plasma with an external Circuit. The same model works fine in 1D but when I try to make a 2D axisymmetric model, i get the error "DAE is structurally...
View ArticleUsing remesh deformed configuration as geometry
Hello,I'm modeling a thermally actuated microvalve. I'm first running a study on only the actuation part, so the valve moving due to thermal actuation without fluid. I want to use the deformed mesh of...
View ArticleCannot resolve for " center of coil" error .
I am designing solenoid for charged particle tracing but I couldn't resolve for the error "cannot determine centre of the coil" under magnetic fields node.
View ArticleCan you control fluid flow with a boundary condition?
Hello, First of all, thank you so much for the time you spent reading/answering my question. [Laminar flow module] I have a pipe with a diameter D,' and I reduce the diameter of the pipe to 'd' for...
View Articleabout Multi-turn coil
in reality，when I wind a coil,If the coil inner diameter, wire diameter and coil height are constant,the outer diameter of the coil is constant.however,in COMSOL If I want to simulate a multi-turn...
View ArticleReusing derived expressions
Hi, Is it possible to reuse the output of derived values in the expression of other derived values, to make the calculation more efficient?I have a model with magnetic fields, in which I excite...
View Articlehow to apply a recoil pressure in CFD?
I am dealing with laser welding simulation. I use a phase field method to track the vapor/melt interface. I can link the heat source to the interface with delta function, but:how can I apply a recoil...
View ArticleMixing Time Scale in Mixer Application
Dear All I'm using Mixer Application, after analyzing the project it shows us the mixing time scale Does anybody know that what is the "Mixing Time Scale"? I mean what exactly tell us and how we should...
View ArticleThermal expansion mass balance.
Hi,I am working on model which involves phase change. I can model that successfully, but I noticed mass is varying as the temperature varies. (makes sense as volume is constant but density varies with...
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