Cable sheath modelling
Hello everybody,I'm modelling a HV cable in a tunnel and I'd like to know how I can model the typology of the sheath (single point, two point or cross earthing). For example if we take the COMSOL...
View ArticleDifferent temperature results for 2D and 3D
I have an object that is cooling down due to heat flux. As I understand it, when only a 2D object is modeled, COMSOL takes a default depth of 1m for proper calculation of ie density and heat flux...
View ArticleOptical Nanoantenna
I want to simulate a Yagi Yuda nanoantenna. The geometry is simple. However, I don't know how to do this. Anyone can help or any tutorial? Please, it's urgent. Thank you.
View ArticleMoving Electrochemcial Jet Machinging, The Model Fails at some point in time.
I am trying to create a model for a jet moving in a reciprocating motion, the jet is ejecting electrolytes to a workpiece material. There is voltage differance between the jet and workpeice material,...
View ArticleTime dependent simulation of single degree of freedom system
I use the lumped mechanical system interface to solve a single-degree-of-freedom system transient simulation. The harmonic frequency is the system natural frequency. Why does the steady-state...
View ArticleTwo-Phase Flow, Phase Field multi physics with compressible flow
I am trying to simulate a liquid piston air compressor - water are entering a vessel full of air and therefor the air start to compress (the air pressure rises), with the Two-Phase Flow, Phase Field...
View Articledepth direction graph
I want to see the temperature distribution graph in the depth direction (z axis) of the multilayer structure.
View ArticleAssigning a function to an Electric Potential boundary
Hello,I am currently making a model using the Electric Currents and the Bioheat Transfer physics. I want to assign a waveform to an electric potential: In stead of a continue 2000 V boundary I want the...
View ArticleMeaning of Zero Charge boundary condition (AC/DC)
Hello everyone!Please help me understand the physical meaning of the Zero Charge boundary condition (BC) in electrostatics. While it is clear that constant/floating potential BC corresponds to a...
View Articlewhich type of comsol physics is used to compute capacitance?
Hi Dear friends, I'm a new user of Comsol software. Currently I'm using Comsol multiphysics 5.3 (Build:223). I want to explore distributed stray capacitances in rotating electrical machines from the...
View ArticleRadiative Decay Rate & Nonradiative Decay: Principles of nano-optics (Lukas...
Hi,I want to model decay rates of quantum dots assembled on substrate (PURCELL effect). The eq. are in the book mentioned in the subject of this post. For instance, they are eq. 1, 2 in following...
View ArticleEigenfrequency change of air column with different temperatures at different...
I am trying to observe the change in Eigenfrequencies of air domain inside a hollow pipe due to effect of temperature. First i did a eigenfrequency analysis of air column inside a hollow cylinder at...
View ArticleNaN for a paramter study using probes
The below post is related to an archived discussionHi,I am getting the same error as posted above. Has anyone found a solution?The issue: I want to do a parameter sweep and using probes I want to...
View ArticleLED lamp cooling application gallery entry
Please find the "LED bulb cooling" application ID:78141 application gallery example solved in COMSOL 5.4 version in the shared folder below. The model was solved using two different solver...
View Articlemapped mesh
Hello all ! I am new to COMSOL and thus my question may be very naive but I am trying to have an idea about the general scenarios when a mapped mesh should be used? Cheers.
View ArticleLivelink for Matlab error - Comsol crashes and closes
Hello,I am using Comsol 5.4 and Matlab R2019b in Linux Centos.I can open Livelink with Matlab usingcomsol mphserver matlabWhen in Matlab, when I usempilaunchComsol opens for a few seconds, then...
View ArticleThermo-Mechanical Modeling of Additive Manufacturing (3D Printing)
Dear all,I am a bit new to COMSOL. So, i have a question regarding the coupling of different analysis.I have developed a transient 3D thermal model for 3D printing and did the thermal analysis.Now, my...
View ArticleCoil - Magnetic Field Numeric coil setting
Hi.I'm new to comsol I have to build a rectangle coil and monitor magnetic field arround it. Coil type is not circular.So i tried Conductor model : Homogenized multi turn Coil type : Numeric i'm stuck...
View ArticleHeat transfer 2D - COMSOL 3.5
Hi, I am doing a 2D heat transfer calculation. When I insert constant values for heat transfer and heat conductivity, it all matters quickly. However, when I define these parameters using the function,...
View ArticleHow to restrain only the electrical displacement in the y direction in a...
dear！ I am doing a subject of piezoelectric beams subjected to lateral forces,and i want to constrain electrical displacement only in y direction,but in comsol i find i need to constrain both x and y...
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