Band to band tunnenling and trap assisated tunnelng
I want to intoduce band to band tunneling and trap assisted tunneling phenomenna at the pn junction photodiode. there is a option of user defined current in continuity/hetrojunction . i am trying to...
View ArticleInternal Boundary Conditions For Diffusion Equation?.
Hello,I'm modeling simple diffusion in a 2D geometry; however, the geometry contains some internal boundaries that I would, at times, like to be able to represent as walls. Consequently, I need to...
View ArticleHow to define the current density integral constraint on the surface of a...
Hi everyone,I want to simulate a superconducting coil, but I only know how to set E-J character.I don't konw how to add a current in the superconduct. The literature use I=integrate(J) toconstraint the...
View ArticleSpy Playing Cards Devices In Delhi
We would like to tell you that KK Cards, Action India Home Products, is the biggest supplier, manufacture and provider of gambling cheating gadgets in Delhi, India. KK Cards have 20 years’ experience...
View ArticleHidden Cheating Playing Cards In India
We have a company, Action India Home products, KK Cards, in India where we sell cheating playing cards. Cheating Playing Cards is the most famous product of our company. We also manufacture invisible...
View ArticleSpy Devices In Playing Cards
Playing cards are manipulated with the invisible luminous ink. Invisible marks are printed on the backside of playing cards. These marks are the rear number of the cards and these invisible numbers are...
View ArticleSimulate Exciting and Detection coils
Dear All,I have tried to simulate the induced currents between the exciting primary coil and the second detection coil. I use AC/DC frequency domain model for this simulation at 20kHz. The excitation...
View ArticleHOW DOES COMSOL SOLVE FOR DEPOSIT THICKNESS?
I was going through several documentations(https://doc.comsol.com/5.4/doc/com.comsol.help.edecm/IntroductionToElectrodepositionModule.pdf) and examples...
View ArticleHOW TO MODEL ELECTROPHORETIC DEPOSITION?
What would be the best module to model electrophoretic deposition of metals on electrodes? How can we make use of the Electrophoretic Transport Interface to make use of the species concentration...
View ArticlePer node excitation of random vibration
Dear Comsol community,It is of interest to excite a plate at each node with an imported matrix that is interpolated. Using the bracket random vibration model as reference -ref, for the procedure I...
View ArticleGetting Permittivity (which is 3x3 material property) with mphinterp function
Hello,I want to get permittivity value (which is 3x3 matrix) with mphinterp but couldn't do that since it is 3x3 material property. Can you please help me about it?The command below defines the defined...
View Articledomain and boudaries
Hello，I am a beginner of Comsol soft ware, aiming at doing some charge particle simulation in the EM field. I am confused about domain and boundary selection, simply my understanding is domain is an...
View ArticleDefining boundary conditions for a periodic structure
Hello everyone,I was wondering if you can help me with this. I'm trying to model a piezoelectric stack containing a number of disks as an actuator in comsol. For lower numbers of disks I can manually...
View Articleiterate the initial conditions based on previous solutions
Hi All,I saw some examples that show me how to use the previous solutions as the initial conditions for the next run through setting up the step tab under the study tree, which is the tab called values...
View ArticleProblem in adding source in electromagnetic wave time domain
Hi, I want to simulate a 2D GPR case in time domain with RF module ewte. The model has two layers of air and earth. I need to put a point source at the air-earth interface. But the point can't be...
View ArticleError when Compiling Equations: The DAE is structurally inconsistent.
Hi, I'm new here and still struggling to figure out the step by step process to run a simulation. I'm trying to simulate a magnetic field from feeding a Sine AC wave to a copper coil. I've generated a...
View ArticleHeat transfer
Hi everybody I modelled a piece of CFRP in comsol with thickness of about 2cm, I used the new module in comsol 5.5 ( thermal stress in layered shells) Everything has gone well but after the simulation...
View ArticleRandomising object orientation
Hello,I have a cylinder within a cube and I am wondering if there is an easy way to randomize its orientation so that its properties can be measured for each instance of orientation. This would allow...
View ArticleSyntax error
Hello, I´m a new user at Comsol and still learning so all the help you guys can give me it will be welcomed.I´m having issues when trying to make a graph line or table with the y axis being the time a...
View Article