LPCVD : Low Pressure Chemical Vapor Deposition Model
Hi everyone, I am new at COMSOL. I've been working on modeling of a Low Pressure Chemical Vapor Deposition system for a few weeks now. Here are the characteristics: _Two gases in the chamber _A heater...
View ArticleMHD
Hello. Does anyone advise me where to be found magnetohydrodynamic model in comsole? Thank you.
View ArticleParametric sweep query
Hello I am trying to implement a parametric sweep in my model. But a problem is that for different configurations, I need to refine the mesh. For example: I have a set of electrodes and between them...
View ArticleFluid Flow through a Loop Reactor
Hello everyone, I just started using Comsol for a few weeks. Currently, I am trying to simulate fluid flow through a Loop Reactor that I designed in inventor. Then, since I imported it to Comsol, I...
View ArticleAirfoil CFD analysis issues
Dear all, I am in the process of doing a study of double staggered airfoils in Comsol 4.4. Before starting to analyze double airfoils I though it would be good to validate a single airfoil model...
View ArticleHeat-moisture coupling, condensation
Hello, I am trying to evaluate one building foundation detail. My goals are to: 1) generate thermal fields in time 2) determine the moisture concentration inside the construction 3) find out if there...
View Articlehow to simulate the couette flow using the rarefied module
hello everyone, i'm new to comsol,recently i'm trying to simulate the couette flow in rarefied environment ,particularly the free molecular flow ,bue i'm not sure how to define the velocity of the...
View Article1-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 ArticleInterior Selection on COMSOL Model
Hi, I'm new to COMSOL 5.0 and working on online image reconstruction ERT. I'm trying to select an excitation electrode and in my model i need to select the interior part of the electrode but the...
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 maxwell equation and pde mode for conservation of space density, but I don,t know how I couple these equation, because for defult, comsol suppose space charge density=0...
View ArticleMr. Ivor..need your help to debug the error on Phase field flow
Dear Ivor, i need a favor from you. please help me to debug the error for my system. the error is showing like : " ... ------- Failed to find consistent initial values. Division by zero. Function: /...
View ArticleHow to solve the problem of negative concentration
I am a totally new user on comsol. Now I try to simulate the mixing in the microchannel without reactions. I use the laminar flow and Transport of dilluted species. There is a similar example from...
View ArticleProblem: Different results for identical mph files
Hi everyone, The attached mph files are identical and created with same COMSOL version. However, their results (pressure versus time) are totally different. Can anyone help me understand what is the...
View ArticleWhat is difference between darcy and brinkman eqn.?
I know darcy and brinkman eqn. are uesd in porous media flow. I heard that darcy is used in small porosity media flow but, brinkman is used in the opposite case. Is that right? If that is right, Is...
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 ArticleMHD
I am working with magnetohydrodynamics. I have to simulate a conductive fluid which is stationary at first. There are 4 magnets under the fluid. AC Electric current of 0.1Hz frequency is passed through...
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 ArticlePeltier Sensor
Hi, Im trying to model a peltier device with airflow over the surface however I'm struggling to: A) link the thermoelectic legs to a plastic/ceramic top and bottom layer B) link the thermoelectric to a...
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