Create a hole on a surface during simulation
Hello dear,is it possible to create holes in the model during the simulation? I would like to simulate the temperature input during laser drilling and it would be very helpful to create the model with...
View Articleokada type, friction between two surface
Hi all.I need some suggestions about how to model a dislocation source (Okada type). The source is modeled as a couple of contact boundaries. I want to put some friction on the surfaces and I add the...
View ArticleAverage function to turn frequency into time domain
Hello, I have reached out to support about this and am still waiting for a response, but just in case someone here can help me: I have run a frequency domain study on a dielectric with two excitation...
View ArticleDifference between inflow and flux boundary conditions in TDS module.
What is exactly the difference between the conditions of inflow and flux in transport of dilute species? Is there any particular reason one would prefer either of them for some case?
View ArticlePropagating light in an optical fiber
Hi all,I am trying to simulate light propagation (Gaussian or any arbitrary field) inside an optical fiber. I am unable to find the proper way to simulate it correctly using the wave optics module....
View ArticleModelling Current Flow with AC/DC Module
Hi!I'm new to Comsol, and I'm trying to model current flow and resistance through a resistive medium (eventually, the resistance will fluctuate, and the study will be time-dependent). However, my study...
View ArticleCell Periodicity Equation
Hi everyone, I'd like to use the cell periodicity boundary condition for my problem, but I have some issues understanding the equation and unfortunately, it is not specified in the User's manual:u_dst...
View ArticleModeling incident beam with finite spot size
Is it possible to model an incident light beam with a spot size of, say, 20 microns? In particular, is it possible to do this for a beam incident on an infinite array (modeled using floquet boundary...
View ArticlePressure transmission between 2 objects that are stacked on top of each other
Hello! I'm analysing a structure which contains two domes stacked on top of each other, with the curved surfaces in touch. However, when I applied a pressure on the topmost surface of the upper dome,...
View Articleevaluate statistical quantities over all particle
running a charged particle tracing simulation with 100(say) input electrons gives a final quantitity qx(x-coordinates) of al particles. How do I evalute say the mean of qx( over all the elctrons) at...
View ArticleHow to simulate a point-wise concentrate load traveling along a structure?
Now I'm working on the moving-load problems of the beams and plates. I want to use comsol to simulate a point-wise force or mass traveling along a beam, or traveling along a path on the plate surface,...
View ArticleCOMSOL CFD Capability
Hi, my name is Julia and I am currently an undergraduate Mechanical Engineering student at Georgia Southern University. I am working on a project that requires complex FSI simulations and I am looking...
View ArticlePDE as boundary condition
Hello,I would like to solve a diffision / heat transfer problem where one of the boundary conditions is a PDE:dc/dt = D d^2c/dx^2Boundary conditions:c(x,t)=c0 at x=0 for all tD dc/dx + (l/h) dc/dt =0...
View ArticleElectrostatic charge dissipation
I want to simulate electrostatic charge disspation over the time on polymer surface (Flat surface or patterned surface). Are there any resources to refer to implement charge dissipation simulation...
View Articlehydrogen plasma
Hello, I would like to know if there is a digital site to obtain the collision cross section data (Electron Impact Reaction), used in the plasma module.thanks.
View ArticleSummation of Matrices
Hi I need to calculate the summation of two matrices, where A(1,1:n) and B(1,1:n) are the considered matrices (vectors). I would be really appreciated if you let me know there is any way to perform...
View ArticleObtain channel response for delivery of nano particles
Hi, I am new to comsol modeling. I am working on a in vivo nano particle delivery model. Can anyone please help me in modeling the in vivo delivery of nano particles? What physics module should I use...
View ArticleCondition Based Boundary Source
I was trying to develop a process model in Heat transfer module (2d). I have curve boundary and a heat source has to be applied on certain portion of the curve . I selected the complete curve in...
View ArticleLocal Cylindrical Coordinates in a Helix
Hello,I am trying to develop a local cylindrical coordinate system in a helix geometry where the longitudinal z direction is along the path of the helix, the radial direction r extends radially outward...
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