1-D model extension
Hello Is it possible to extend a 1-D model in COMSOL to 2-D while retaining the boundary conditions automatically? I sincerely appreciate the help. Thank you Zaid
View ArticleMagnetic Field of a Multi Layer solenoid
Hello Everyone, I have no experience in using COMSOl. My professor wants me to run an example project in this software and I have a few specific questions. The problem statement is: I have a multi...
View ArticleModel convergence issue
Hello everyone I am conducting a time dependent study. My model converges for smaller time scales viz range(10^-12,10^-6,1.1354e-5) . However, when I run the study for a larger range, which is...
View ArticleHow we solve electrohydrodynamic eauation(Maxwell and Conservation of space...
Hi I use Electrostatic mode for the solving Maxwell equation and PDE mode for the solving conservation of space density, but I don,t know how I couple these equations, because for default, COMSOL...
View ArticleWhat would be your ideal COMSOL workstation?
Hello all, I am in the process of building my own COMSOL workstation, and am looking for advice. If you were building your own computer from scratch, what parts would you be sure to get (besides a...
View ArticleTemperature dependent Loads
Dear all, It is possible to define Temperature dependent loads in COMSOL as "hload(T)". Where is T is a field variable. However, is it possible to define the heat load as a function of temperature at a...
View ArticleHow to model laminar flow in 2d pipe flow with Comsol
Hi, I want to simulate a standard laminar flow problem using comsol. This problem is being for validating Comsol. The 2D pipe geometry is 0.2 m dia and 8 m length. The flow is laminar flow. Velocity is...
View ArticleCapacitive time-dependent modelling
Hi, I want to model a current controlled Capacitive model. Could anybody help me how to model it? What are the boundary conditions and which module to choose? what are the properties of the block that...
View Article1D Schrodinger equation
Dear Comsol users, I want to solve radial Schrodinger equation for Hydrogen atom in comsol. So I use 1D axisymmetric coefficient form PDE and solve for eigenvalues with boundary conditions as u =0for...
View ArticleDiffuse Double Layer
Hello, I've been trying to model the effects of a double layer capacitance in a 3D system. Then I came across the following model tutorial that models the Diffuse Double Layer in 1D....
View ArticleHow to set a logarithmic function
Hallo forum, I want to set the temperature of one layer as a logarithmic function 2*ln(T)+5, but comsol said that it doesn't know this function ln. So anyone can help me to solve this problem?
View Articleparametric sweep study depending on a parametric sweep study
Hello, I am having a big issue here in my simulation. I have two studies: Study 1: I did a parametric sweep stationary study with a first physics model (laminar flow) for different geometries with only...
View Articlesingularity. error
Hello, Does anyboday know why I encounter the below error message in Comsol 3.5a? Error: Time 7.86913096623935e-007: Repeated error test failures. May have reached a Last time step is not converged....
View ArticleContinous drive friction welding
Hi, I am beginner in work with this software . I wish someone could help me through this problem. I have working on numerical model of continous drive friction welding and i try to get solution like...
View ArticleModelling of drug release from materials based on electrospun nanofibers
Dear colleague, I am a COMSOL user starting in the simulation for the chemical reaction engineering> transport of diluted species. I have struggles in this simulation which depending on find the...
View ArticleElectric Field in Insulation Considering Conductivity and Permittivity
Hi Folks, I have a physical model of a slab of a dielectric under a voltage difference, let say V volts, in which I want to compute electric field distribution (E) considering the influence of...
View ArticleImport a matrix (m*n) from Matlab to Comsol
Hi all, My name is Hau Nguyen. I try to solve a partial differential equations (PDE) that one of variables is a digitized data (function of x and y axes) resulting from a Matlab script. The digitized...
View ArticleBoundary allocation changes in MATLAB loops
HI I am running COMSOL simulations using the LiveLink for MATLAB , in which I am changing some geometrical dimensions in each running loop . I have noticed that the allocation of the boundary numbers...
View ArticleKumar-Booker-algorithm
Hey everybody, I want to implement a mass-conserving Kumar-Booker cavitation algorithm to Comsol. Therefore I'd like to use a PDE in coefficient form (c) in order to describe the modified...
View ArticlePhase Change Border as a Heat Source
Hello everybody! In the context of my master thesis I am simulating 2D-laser cutting of carbon fiber reinforced plastics in Comsol v5.0 and reached the following problem... The attached picture...
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