what is the meaning of the magnitude and direction of the arrows on the...
The arrow surface with local velocity is plotted. Does the velocity is the particle velocity? since the vibration of the particle is simple harmonic vibration, why the directions of the arrows are in...
View Articleerreur : Solveur stationnaire 1 : Attempt to evaluate nonintegral power of...
Bonjour, Jes souhaite simuler un réacteur catalytique: les réactifs sont en phase gazeuse et le catalyseur est introduit sous forme des particules.Pour se faire,j'ai commencé par un modèle en 1D où: -...
View ArticleQuestion about Adaptive method for Curvilinear coordinates
COMSOL v5.x has possibility to use an Adaptive method in order to define Curvilinear coordinates system (https://www.comsol.com/blogs/defining-curvilinear-coordinates-anisotropic-materials/). According...
View ArticlePipe with increasing diameter
Hello I am trying to simulate how the flow profile will change when a pipe diameter increases. How can you vary the diameter within the same geometry? Thank you!
View ArticleGeometry Shape Order
Hi Everyone,I am trying to simulate a simple MBB problem (with filleted corners) using the Solid Mechanics interface. I am playing around with the Geometry Shape Order option, I am trying to make sure...
View ArticleFailed To Evaluate Variables And Jacobian Variables
Hello everyone, I am trying to solve a phase change model in 5.3a version of a shell and tube heat exchanger and getting the problem, i have tried a lot but unable to find the solution can anyone help...
View ArticlePolar plot in eigenfrequency analysis
Dear all, I am doing an eigenfrequency analysis of an unstable rock block to compare it with the modal analysis results I obtained with the accelerometer data that have been collected on the unstable...
View ArticleUnderstanding Surface to ambient radiation process
Hello everyone!!! Is there any specific method to do surface to ambient radiation? Can we do it by Diffuse surface? What exactly is the difference between surface to surface and surface to ambient...
View ArticleFactorial Operator in COMSOL
Hello, I am trying implement a function that contains the factorial operator: n! = (n)(n-1)(n-2)...(1), where n is a positive integer.I cannot find this in the "Operators, Functions, and Constants"...
View Articlebeam end release - hinge Beam
Hello. I use BEAM finite elements. I would like to connect two or more BEAMs through an internal hinge, is it possible?In other software you can do it via the beam end release.
View ArticleDoes anyone have a 1D example of a LiFeP04 (LFP) battery
It seems that the recient capacity fade webinars use LFP examples yet COMSOL has no demos or examples of the implementation. Is it because the COMSOL LFP model is too sensitive or fragile to...
View ArticleUpload your picture
Hello Discussion Forum users!We've updated the look and feel of COMSOL Access. My favorite feature: you can upload your own profile picture to replace the geometric avatar we assign you by default. To...
View ArticleMeshing help
I am new to Comsol. I got a basic training and some goto documenation. However I got a customer cad drawing and would like to do magnetic simulations. Painstakingly the meshing seems to be difficult to...
View ArticleFloating electrostatic potential at Metal Contact
Hello, I'm using Semiconductor Module to solve drift-diffusion equations for a solar cell in 1D domain with two Metal Contacts (both Ohmic) at left (A) and right (B) point of the domain. Traditionally,...
View ArticleLow Field NMR Permanent Magnet
I want to design permanent magnet for low field nmr systems. I'm not a newcomer yet. physically I chose Magnetic field no current (mfnc). I've designed the necessary geoemetry. I defined the outer...
View ArticleHelp with Torpedo
Dear guys I have a torpedo running underwater upstream. I want to simulate the torpedo change the depth. For example: initially, the torpedo is at 100 m below the water surface with v = 1m/s (just an...
View ArticleImproving the accuracy of length
Hi there,I am running a simulation of a mechanical mechanism.I have a problem about the accuracy of the length in COMSOL.The minimal is 0.001mm, which is not small enough for my simulation.Is there any...
View ArticleAcoustic / Ultrasonic related queries
It is related to Acoustic / Ultrasonic. There is sink of SS material of dimensions 445 x 430 x 225 mm which is filled with water. There is a transducer at bottom of sink. Top of sink is open. By giving...
View ArticleTip reaction forces for a clamped-roller beam
Hello all,I am building a model to predict the deflection of an actuated beam; both for a single segment uniform beam and a segmented beam with indepedent actuation in each segment. The model is...
View ArticleAppropriate modeling for tuned mass damper attached to a solid mechanics model
Hi: I want to model a tuned mass damper(a damping system with a mass, stiffness and damping) which is attached to a solid mechanics model, but I can not find the effective way. I tried lms system, but...
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