Defining the material of a laser rod.
How to define the material of a laser rod as Nd:YAG in COMSOL 5.4?
View ArticleCalculation of thermal resistance of AlGaN/GaN devices
Hi, I am trying to calculate the thermal resistance of an AlGaN/GaN based laser device. The sstructure contance n and p waveguides, contacts, cladding and electron blocking layer. The active region is...
View ArticleComposite Sandwich Model
Hello Everyone, What I'm supposed to for modelling sandwich composite modelling? I have been trying to modelling sandwich types below;type-1: (0,90)2/Isotropic Core/(0,90)2 type-2:...
View ArticleTime-Dependent Nernst-Planck Equation
Hi, I wanna simulation the process of concentration gradient driven electrical potential. In this case, I choose the physical field as Nernst Planck Equation or Tertiary Current Distribution (TCD). The...
View ArticleLaminar or Turbulent Flow
Hi all,I am modelling flow through an inlet of a HX as I want to analyse the pressure drop. I am quite sure that the flow will be laminar due to the low mass flow rate of 200 kg/hr, however the...
View ArticleQuasi Static or Include inertial Terms
Hi everyone,I'm creating a breast model in order to study the effect of the gravity force. I've used time stepping with the adaptive time step provided by COMSOL, and increase the gravity progressively...
View ArticleUse the mode shape from eigenfrequency analysis as the initial condition for...
Hello,I want to use Step1:eigenfrequency to obtain the mode shape of the first bending mode; then in the Step2:Stationary, I want to use the Z displacement of the mode shape in step1 as an input to...
View ArticleHow to define solar radiation as a boundary in participating media?
I would like to simulate radiative heat transfer in a semi-transparent material which is exposed to solar radiation. I am coupling two physics: "Heat Transfer in Solids"& "Radiation in...
View ArticleHow to define plasma permittivity in eigenfrequency mode?
I try to plot the band gap of 2D plasma photonic crystal in COMSOL using RF interface, but when i try to define the plasma permittivity which is complex and frequency dependence function...
View ArticlePlamsa module simulation error "Division by Zero"
I downloaded the capcitively coupled plasma simulation file from the following web: https://www.comsol.com/model/gec-ccp-reactor-55011The only change I did was changing the geometry and mesh to suit...
View ArticleOpen 3D matrix from MATLAB in COMSOL
Hello!I have 3D matrix in MATLAB (temperature field). I can save it in . mat format. Can i open this matrix in COMSOL?URL at matrix: https://yadi.sk/d/20vvHulLFtyVCwBest regards, Alexey
View ArticleHow to calculate heat dissipation in each layer by COMSOL?
I have a 2D stucture of a laser and I can see the temperature profile with respect to heat sink. The structure consists of multiple different layer. I need to know how much/ what percentage heat is...
View ArticlePoisson Ratio Of Water
The below post is related to an [archived discussion](/forum/thread/135133/poissons-ratio-of-water) Hi, I'm trying to run the Poroelasticty module (Single-Phase Darcy's Law coupled with Solid...
View Articleneed a 3D modeling of heat and mass transfer comsol example
Comsol has an example of heating chicken patties in convetion oven. inspecting the moisture and temperature distribution of the patties. Now, I am trying to make a 3D spherical chicken patties. at...
View Articlemagnetorheological fluid simulation
Dear All, I currently trying to simulate the effect of magnetorheological fluid on a vibrating cantilever beam. A tip magnet is attached to the beam and the magnetic field generated is used to activate...
View ArticlePtype semiconductor material
how we can run simulation without semiconductor module licence in comsole 5.4 for simulation of ptype and ntype material
View ArticleSAW Delay Line Gas Sensor
What is the reason for getting complex eigen value for SAW delay line gas sensor?What actually a complex eigen value signifies ?please let me know
View ArticleCOMSOL with MATLAB
Hi, I am working with a LiveLink MATLAB. After importing the model from COMSOL to LiveLink MATLAB. This is two transient simulations results from COMSOL to MATLAB.I want to apply a condition to cool...
View Articlehow to take variable（curvature）into comsol 5.4
I want to calculate the curvature of the raised droplets in the graph. I don't know how to introduce this parameter.（Oval represents droplet）Thank you，every bro.
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