Eigenfrequencies of a spring WITH Gravity
In the real world, I have a flat steel beam that is acting as a spring. It starts out curved into a semicircular shape, and then it is loaded with a hanging weight that brings it down flat. I want to...
View ArticleTime dependent study on a 3D multiturn coil inside of an electrical circuit
Hello, I am trying to model the voltage in function of time across a 3D multiturn coil inside of an electrical circuit. To do this I use the Magnetic Fields and the Electrical Circuit physics and a...
View ArticleTracking Residual
I need to track the residual in my simulation in order to represent how closely the governing equations are being represented. I know comsol keeps track of residual since ive had several errors...
View ArticleFailed to find consistent initial values.
Hi. I coose frekvenci transient study and get thise error. Failed to find consistent initial values. Last time step is not converged. THANK
View ArticleRF frequency domain scattering electric field module- normalization of...
I am uncertain if I am incorrect in my assumption, so I have come here hoping someone can clarify for me. emw.Ex -displays the scattered electric field emw.Ebx -is initial background electric field...
View ArticleALE moving mesh + electrostatics force calculation are in conflict
Hello Everyone, thanks for all the support or tips you may give on the following problem. I am trying to couple three different modules, to monitor the displacement of a bubble in a channel in 3D under...
View ArticleNavier-Stokes Solver
Hi dear Jorge Concepcion, Please find attached the model you are working on. (seems working) I have implemented your equations and set your geometry. I have done a test with your BC, it seems that you...
View ArticleNo Laplace Pressure (interface curvature) in multiphase level set simulation
Hello everybody, I am simulating in version 4.3 a drop of oil in water with the level set multiphase module coupled with the electrostatic module as in the electrocoalescence example from the model...
View ArticleElectric Currents and Transport of a Dilute Species to Generate IV Sweep Plots
Hello community, I've created a working and functional model that shows the migration of two oppositely charged species over time in response to an applied electric potential through the bulk material....
View ArticleScattered field problems
Hi I need to simulate the scattered field of a single-layer array rods plced in air. I used "solve for: scattered field" setting. The background field setting Ex=Ey=0,...
View Articlelinear elasticity equation
how can I enter linear elasticity equation in using PDE equation?
View ArticleQuick question regarding integration order in Generator 2D model
Hello all, I have a quick question regarding the integration order of the z component of the electric field in the example model "Generator 2D". In the example model the order of integration, and thus...
View ArticleMaking the Generator 2D model into a Motor 2D model
Hello all, How would one change the example model, "Generator 2D" into a motor? Is there a way to make the rps parameter of the "Prescribed Rotational Velocity" property be based on the magnetic field...
View ArticleEmpty parameter list
Hi everyone, I'm beginner to COMSOL and I'm modeling hyperthermia cancer treatment with magnetic nano particles. I'm using bioheat transfer for the body cells, mixture model for modeling nano particle...
View ArticleMaximum number of Newton iterations reached
I have imported a 3D meshed model from simpleware to COMSOL 4.3b. Some of the materials of the model are Hyperelastic, Neo-Hookean. While running the model via Direct Solver at 99% of progress there is...
View ArticlePDE
I am currently working on COMSOL 4.0a. Can anybody tell me how the variables for stress are defined in COMSOL? Since I want to define a Coefficient PDE, which its diffusion coefficient (c) is coupled...
View ArticleCoupling Stationary study -> Time dependent does not work
Dear all, I have a very simple model (attached): a 2D model where I impose an initial strain, that generates stress. This stress will be relaxed by creep. The stress caused by imposed strain is...
View ArticleCan I access each cell's residual
Hi, I was wondering if it is possible to access the flow residuals from a UDF? I need to be able to access the momentum and continuity residual for every cell in the computational mesh. Thanks, Farid
View ArticleMeshing 2-D and 3-D geometries with matching meshes
Hi! I have a very expensive 3-D electro-chemistry problem which I am trying to simplify. The problem has fluid flow and electro-chemistry (tertiary current distribution) equations in it. I would like...
View ArticleEigenfrequencies of a spring WITH Gravity
In the real world, I have a flat steel beam that is acting as a spring. It starts out curved into a semicircular shape, and then it is loaded with a hanging weight that brings it down flat. I want to...
View Article