How to setup a periodic Boundary condition with automatic remeshing?
I have a laminar flow problem coupled with heat transfer. The domain is periodic in the lateral direction, so I use the periodic flow condition for laminar flow and the periodic flow condition for heat...
View ArticleModelling Pressure Drag using Acoustics Module
Hi,I have a model of oscillating structure and I would like to study the pressure drag effects due to the surrounding fluid. Is it possible to use the Acoustics module of comsol to model pressure drag....
View ArticleWhat does Cauchy mean in Double Dogleg solver?
Hello all,Can anyone tell me what Cauchy stands for in the Double Dogleg solver for a stationary solver? I do not obtain convergence in my model, but am unsure as to what might be the reason because I...
View Articlethe problem of probe
I'm sorry to bother you##But I have a problem that bothers me,I'm doing a simulation of liquid dripping onto a horizontal tube(Gas-liquid two-phase flow),I want to get the liquid film thickness value...
View ArticleAcoustic Cleaning
Hi guys im doing an undergraduate in mechanical engineering and doing a project in Acoustic ckeaning for boillers , im new to comsol and would like to simulate the acoustic horn to determine sound...
View Articlethe model case is not calculated.
the model case, application 55891, is not working. when I run its study-2, the model shows the expression is wrong? how can I fixit and solve it? thank you very much~
View ArticleParticle Tracing in 3D
I have been going through certain examples of particle tracing in a 3D path and have found only examples for laminar flow. My application requires creeping flow and application of electric...
View ArticleCan not see work plane in model builder
I am following the PDF documentation of Heating circuit example. In geometry1, after creating the block, the next step is click work plane. But I dont see a work plane in my model builder under...
View ArticleNeed support about magnetic field diffusion time in Comsol
Dear Sir/ Madam,I am working in electromagnetic transient analysis with Comsol program and need some support.My simulation model includes one copper coil and one iron core, In there, I supplied a...
View ArticleGlobal Variable using Local Variable
I want to define a global variable using some local variables which were computed by the simulation. How can I do that.Thank you.
View ArticlePlotting a fixed temperature on a surface for all timesteps
Hello together.i got the following problem. I have allready solved a problem about laser welding in comsol. Now i would like to plot on a surface perpendicular to the welding direction the molten pool...
View ArticleIs there any way for import a file from the outside (i.e. background) as an...
I have an initial temperature field distribution T0(r,z,t=0), and I want to use that as my initial field to study the thermal diffusion problem. How to do this?
View ArticleNeed Help about graphic modeling
Hello everyone.， I'm building an model, I first create a circle, and then how to divide the circle into 32 * 32 small squares (forms the circle,regardless of boundary)?!!
View Articledye sensitized solar cell counter electrode simulation
I need to know ,how to simulate my noval counter electrode data in dssc ?how to simulate it by using comsol ?
View ArticleInertia force with an eigenmode-shaped acceleration distribution
Hi all, Is it possibile to insert an inertia force (maybe using the gravity load type) with an acceleration distribution taken from an eigenmode of an eigenfrequency analysis?The problem is to give a...
View ArticleMeshing Error
Failed to create swept mesh for domain. - Domain: 1 Domain must be bounded by one connected face component only. Comsol Meshig issues I keep getting this error on Using a Physics controlled mesh. I am...
View ArticlePacked bed reactor
I tried to follow step by step your example in COMSOL 5.4 for a Packed bed reactor. However, after the model has been introduced following all steps in the guide, when I click "compute" the following...
View ArticleSound Hard Boundary
Hi,everyone.I'm a new comer and I wonder what the Sound Hard Boundary means
View ArticleCalculating the Density Of State (DOS) of a lattice structure
The below post is related to an archived discussion[start here]Hi Guys,Yes, anyone know how to calculate the density of state (DOS) of a lattice structure using comsol? Thank you in advance if any one...
View ArticleDesign of Graded index few mode fiber
Hi all I want to design a Few mode fiber with graded index core. when it is step index there is no problem. But I am getting difficulties for graded index core design. I hv used analytical functions to...
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