getting error message in modelling phase change problem
can anyone help me in this type of error while modelling phase chnage problem: Undefined variable. - Variable: comp1.u - Geometry: geom1 - Domain: 2 Failed to evaluate variable. - Variable:...
View ArticleUnable to modify Laplace equation to satisfaction
Hello, I am trying to find the Pressure distribution within the eye by using the laplace equation.The equation for this isK*d(d(Pressure,x))I have 4 domains inside the eye and they all have different K...
View ArticleNeed to change units of concentration
Hello,I am using the transport of diluted species module to simulate drug diffusion through the eye.I need to give the concentration of the drug in the eye ball in terms of mg/cm3 but comsol is...
View ArticleHo to specify magnetic field in a domain
Hi All,I've been scouring the internet for an answer to this question, but I can't find anything about what I'm doing wrong.I'd like to specify a certain magnetic field in a cylindrical air domain that...
View ArticleNot able to access the Tubular packed bed reactor model.
Sir,I'm not able to download the packed bed reactor model file discussed in the 3-D Multi-scale Packed Bed Reactor. Can anyone help me access it?Thank you.
View ArticleTime dependent study for electromagnetic heat source coupling
Hello, I am working on magnetic braking related work.In this i need to do magnetic and Heat transfer analysis, therefore i have taken electromagnetic heat source coupling, done the stationary study,...
View ArticleBoundary Condition for Coefficient form PDE
Hello, I am using the Coefficient form of PDE and I need to set a boundary at a concentration value of 1[mg/cm^3].When the simulation runs, This concentration will spread uniformly throughout the...
View Articlemass balance failure..
Hi.I am new in COMSOL and I am currently working on a model of supported liquid membrane devices. The basic model is that two channel are separated by a layer of membrane in the middle and species...
View Articlehow to draw a bowtie structure
Dose any body have a file of comsol in which bowtie antenna is formed. If any body have it. please give it to me I am in great need.
View ArticleHow to do multiple static analysis steps and use adaptive remesh to update...
Hi, I'm trying to reconstruct a model of cytokinesis in this paperI've tried axisymetric model in COMSOL using the remesh of a single static step in the adaptation and error estimate as the following....
View ArticleIncoherent propagation of light
Hi I'm working on thin film solar cell simulation on COMSOL 5.3a, and in order to overcome the incoherent propagation of light in the thick glass substrate (2mm), I'm going to use phase elimination...
View Article3D stress calculation: no mesh on domain 1 when choosing mapped option
Hi,I am trying to calculate the stress due to a point load in 3D block geometry. When I am using a mapped option mesh, no matter which size of mesh that I choose, comsol always return an error "no mesh...
View ArticleSetting of time dependent study for cyclic voltammetry
Dear all,I want to define a time dependent study for cyclic voltammetry under the Transport of Diluted Species Interface. But I cannot find the way to define the parameter of scan rate. It seems the...
View ArticleSelection of surface between circles
Hi,I'm discovering Comsol 5.0 with Matlab, and I'm stucked on a simple problem, but I don't manage to have a solution. I join the m-file. I'm working on a 2D geometry exclusively composed of circles....
View Articleparametric sweep initial conditions
Hello COMSOLer's ;Currently I am tryig to simulate a stationary study of a plasma flow discharge with a parametric sweep ; since the geometry of the discharge gap is varying in each step. i remmember...
View ArticleReactive Pellet Bed feature
I am currently corking on a simulation based on "A Multiscale 3D Packed Bed Reactor" model. I can't find the Reactive Pellet Bed feature. I have Chemical Reaction Engineering feature and I almost...
View ArticleInitial values for a time range
The below post is related to an archived discussionHi,I have a question about initial conditions in COMSOL. Is it possible to have initial values for a time range? I want to produce the ground...
View ArticleExtracting boundary points and their corresponding coordinates?
How to extract boundary points and their corresponding coordinates from a meshed structure
View ArticleNeed to modify Equation(Transport of Diluted Species)
Hello, I am currently doing a research project and I need to modify an equation. I want the 'R' value on the right hand side to be 0.I have attached a photo with the equation I need to modify.
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