depth 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...
View Articlecalculating change in refractive index in acousto-optic tunable filter
I am working on acousto-optic tunable filter (AOTF). I did acoustic simulations on COMSOL to find Rayleigh velocity and electromechanical coupling co-efficient in layer structure by changing layer...
View ArticleComputing the noise produced during snap through effect
Hi,I am trying to find the noise produced when a arch shaped structure snaps from one configuration to the next when loaded with a vertical boundary load. I was trying to link the structural mechanics...
View ArticlePlane symmetry /// Solid Mechanics Module
Hi there,I have a 3D model with a symmetry plane. I cannot find any boundary condition in my COMSOL's 5.0 Solid Mechanics module for symmetry. Am I missing it, or the symmetry boundary condition is...
View ArticleHow to get voltage ?
I have developed a COMSOL program to find voltage from coils.In this program, i have placed a big cylinder, in opposite sites of cylinder i have placed 3 turn coils, one in clockwise(Coil1) and other...
View ArticleExcluding geometry boundaries from meshing, but maintaining them as domains
Hi there,I am currently working on a 2D CFD-simulation, and I've come accross the following problem to which I cannot find a solution:I want to define three additional domains in the geometry I've...
View ArticleHow to define a variable for a range of values?
Hi,I am trying to simulate a spontaneous fluid uptake process in a rock where capillary pressure is the driving force. I am using Coefficient Form PDE physics. In such a case, only damping coefficient...
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