Chloride ion erosion of concrete in dry wet cycle
In the simulation process of chloride ion in concrete drying and wetting cycle, I use the convection diffusion model and coefficient type partial differential equation, but these two physical fields...
View ArticleMovement of bead in flow
Hi, I would like to (in a first step) model the movement of a bead in flow. This would be very similar to the demo here : https://www.youtube.com/watch?v=iyA5UiBJY0QExcept that in this case the bead...
View ArticlePlot the value of a parameter at a specific point over time
Hello,I have used COMSOL (5.3a) to solve a time-dependent 3D heat transfer model. I am trying to plot the temperature at a specified point over time. A 2D graph, with time on the x-axis and temperature...
View ArticleComsol multiphysics node
Hi there, I am using Comsol 5.3a to couple Darcy eq, transport of dilute solutes and electrostatics together for 3 different solutes (Na, Cl and Albumin). When I am using "Multiphysics" to couple these...
View ArticleMicro membrainless fuel cell mesh problem (help plz)
Im working on fuel cells without membranes. After applying geometry and boundary conditions, I am working on a mesh, but an error appears with this message. And i dont understand this message. (Failed...
View ArticleFSI
Dear all, I am a new COMSOL user and I would like to simulate the morphological changes of red blood cells in blood vessels. Can someone help me do this or tell me how to get started? Thank you
View ArticleNo external material selected?
Hi Folks, I'm new to all this.. I made a 3D coil using one of the prefabricated examples, and added an air box around it. When I try to compute, I get the error "No external material selected." I'm not...
View ArticlePasscode
The below post is related to an archived discussion[start here]Hello, I'm new here! I'm trying to determine the liquid flow and heat exchanger which are used to similate systemAs a beginner, I have...
View ArticleFSI - Not converging
Hi,I am trying to simulate a free particle movement in microchannel. The particle moves upto a certain point and stops. I get the error "May have reached singularity or Maximum number of Newton...
View ArticleGeometry using topography data
I'm trying to set up a geometry with topography under a dome of other material. There are two ways I've attempted to do this, described below. In both cases, I set up a parametric surface using the...
View ArticleAnnoying bug in Parametric Sweep
Hello, I'm using Parametric Sweep alot, and I've notice very annoying bug (or it is just my bad). Here is the senario of the problem: 1. I set up a Parametric Sweep for first time. It worked just fine....
View ArticleA confliction in using 2nd Piola and Cauchy stress in built-in equations of...
Dear all,I have been working on modeling of elastoplastic reponse of a metal during last months in Comsol 5.5. Since I ran into a confliction in equation view of related nodes, I was wondering wether I...
View ArticleInterior Fan, Nonlinear solver did not converge
Hello everyone,i want to make a Heat Tranfer and Laminar flow model with PCM in a cooling box. The PCM-Boxes are behind a wall and a canal is behind them in which the air is flowing from the bottom to...
View ArticleDeformation visualization
Hi, I want to study the pitting corrosion. I tried different options like: Moving Mesh (Ale), Phase field, Deformed geometry, and Transport of Dilute Species + Solid Mechanics to make the deformation...
View ArticleSimulation of HEMT model.
The below post is related to an archived discussion[start here] I want to simulate GaN HEMT using 2D plot . Can anyone suggest some tutorial or help me understanding the HEMT simulation for self heating.
View ArticleRay heating
Hi, I want to heat a tungsten carbide using a laser. I want to see how the temperature is distribution looks inside the material. Then I want to change the diameter of the incident ray and check for...
View ArticleOptic Module Surface Roughness
Hi,How can I add random surface roughness in a mirror (p.s under geometrical optics illuminated surface didnt work out :(( ) ?Regards, Kerem
View ArticleSimulation for unit cell phononic crystal
I have been trying to simulate the band gap of elastic wave propgation in the phononic crystal of a plate with a periodic stubbed surface. The geometery of unit cell is presented in this paper...
View ArticleLumped port: connect ec to mf?
Dear all,I'm trying to model a simple U-shaped copper piece connected to an electric circuit (ec) at the inlet and outlet (basically a short cut). I'm eventually interested in the magnetic field...
View ArticlePML for plate
Hello, I am using structural mechanic (plate physics) to model a 2D plate. I tried to find a way to make it like an infinite domain; however, I could not do that. I remember that I used ''PML'' or...
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