Passing nodal values to a Matlab function
Hello,I am doing topology optimization of a heat transfer problem, and I am trying to use a Matlab function to calculate one of the objective functions that requires the nodal values of rho_design and...
View ArticleWant to know coordinate- temperature information
Hi ,I'm doing joule-heating simulation. I want to know coordinate-temperature information . How do I can access coordinate -temperature? Now i only have surface temperature but i want to know inner...
View ArticleInfromation about edges
HI! I need to make an explicit selection of some edges of my geometry. It's difficult to do it manually, so I'd like to implement it in Matlab. Is there any place where the information about edges is...
View ArticleElectrowetting modeling questions
Good morning. I followed the "Electrowetting Lens" example from the Application Gallery. The original model works well. Then I try to change the shape and material of the two fluids. I want to simulate...
View ArticleIssues with boundaries
Hi all,This is my first post on here, so thank you in advance for the help. I'm having an issue running a simulation that involves two separate flow streams: both water and air.The air is simply...
View ArticleIs it possible to scale the horizontal and vertical coordinates differently?
I am studying some microfluidic flow problem. When I'm doing the analytical work, I can often simplify the problem under the assumption that one spatial coordinate is much smaller than the other one...
View ArticleModeling of soil-wall interface (Earth retaining wall)
Hi, I have been modelling a diaphragm wall with COMSOL. During the modelling I have faced problems to model the interface soil-wall.It seems that to define an internal boundary condition, one needs to...
View ArticleExtracting results of specified coordinates
Hi, I am doing simulation and got a results of 2D plot as shown below. I want to extract the output of specific coordinates for example coordinate of (0,-1100), (1,-1100), ... (45, -400) , etc.. Do you...
View ArticleFlow and heat transfer through packed bed of spheres
Hello, The study is time dependent, it's 2D axisymmetric, and the physics used are laminar flow and heat transfer in fluids with heat transfer in solids node added to it. It is not converging and the...
View ArticleSpiral flat Coil Simulation
Hi there, I am trying to simulate a printed spiral coil and I am using the Coil sub-branch in the magnetic field physics. I would like to see the magnetic flux generated aroud the coil. In the...
View ArticleResidual stress
Hello all,I am trying to simulate the behaviour of a structure that goes through thermal stress. The temperature is applied through a time dependent expression and the temperature goes from 293K to...
View ArticleSimulating the Hall Effect
I have done a search on this forum and all the threads I have found are from years ago.Is there a simple way to simulate the Hall Effect? It really doesn't seem like it would be that complicated.All of...
View Article2D grid of points and curve fitting according to an equation
Hello Everyone, I need to fit a curve according to an equation, between the selected points in the 2D grid of points. I am making an app. in comsol where there has to be a grid of points, when I select...
View ArticleBuoyancy--simulating contamination of a buildings ventilation air intake by...
Hi all, I am trying to model a cross section of vertically aligned ventilation ports on the ouside of a building. I am using a 2D domain to represent this outside space where an inlet delivers warm air...
View ArticleRotational mechanics in microwave oven plate
Hi all i am trying to rotate plate ina microwave oven to study the process as well as as an exercise for roatational mechanics. while doing so ,i had some issues after importing the cad file. after...
View ArticleSimulation of photonic crystal waveguides to find band structure by COMSOL
Hi everybody,I am trying to simulate a photonic waveguide using COMSOL. The geometry is more or less as mentioned in https://www.osapublishing.org/ome/abstract.cfm?uri=ome-7-1-43.The point is that when...
View ArticleLaminar Flow from a cylinder into a block?
If I create only one block and create an inlet on one side and an outlet on the other I am able to simulate a laminar flow through that block. But as soon as I create a cylinder and a block, my flow...
View Articlenanopore
I would like to model nanopore sequencing. I probably have a record that holds a small of about 2nm. This plate separates two chambers. These chambers are connected through the hole. There is an ionic...
View ArticleFailed to find consistent initial values. Attempt to evaluate nonintegral...
Hello comsol community,I am in the process of coupling Electrostatics, Heat Transfer in Fluids, Transport of Diluted Species to Two Phase Laminar Flow (Phase Field) and having some difficulty. The...
View ArticleHow to construct particle tracing and analyze particle motion in the coupling...
In the coupling field formed by electrostatic field and fluid, only fluid flowing particle and charged particle physical field can be simulated separately at present. How to find a particle tracking...
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