Comsol Definition and 175 Threads

Hello, anyone with some experience in Comsol? I have a few basic questions on the RF module thanks!

Hi All, I am pretty new to COMSOL. I want design model of a sensor with four electrode. This sensor mainly based on impedance spectroscopy principle. The model should measure the distance and thickness of the obstacle due to change in capacitive impedance of electrostatic field between the...

I am trying to model intrinsic stress of some thin film heterostructures. As I am not a modeler but an experimentalist/processor by trade, I would prefer to minimize the amount of time I spend banging my head against the wall trying to find out if this software is appropriate. So, my question...

Firstly I really feel so lucky to find this forum. Since I don't have a strong physics background but now dealing with many problems directly related to physics. I'm now doing some simulation in comsol and need to solve some PDEs. I'm using this PDE coefficient form in comsol. The equations...

Hi, I am not sure if this is the right place to post a COMSOL question. If not I apologise, could you point me to the right place. I have a 3D geometry in COMSOL shape like a "T" where I want to model flow using navier stokes and a chemical diffusion using convection and diffusion. Both...

Hi all, i Have a small problem regarding modeling of Soil layers.. The problem is , I need to draw 3layers of soil each measuring 3*0.7, 3*0.15, 3*0.25 .At the middle of the 3*0.25 layer i need to apply a load of 60Kpa & find out the deformation on all the layers because of that...

Hi, I am Pretty New to COMSOL & using it for my thesis work. I have started reading COMSOL multiphysics user's guide & able to draw geometry's. But i am unable to analyze a model like using Boundary setting etc.. I am very confused with the Options>sub domain/boundary expressions &...

Hello everyone, Does anybody use Comsol multiphysics here? I am trying to model the electric double layer. If you have experience, please share with me.

Hi, this is my first post. I'm new in using comsol multiphysics and I'm trying to model a spiral inductor which is placed in an another material (glass) which is over a substrate. The pads of the inductor are outside the material. What I'm trying to find out is, the temperature of the surface...

Hello friends, Thanks in advance for your answers, I am using genreal form of PDE to solve system of PDEs. I am dealing with cyllindrical co-ordinates under axisymmetric case. I am not able to understand how to implement boundary conditions such as, DEL. Gamma=F is system of PDEs where...

I need some help with COMSOL MULTIPHYSICS. I don´t have any experience with FEM analysis. I am solving a non isothermal flow model, and I am varying heat flux that enters in the subdomain through one boundary. I set a value for heat flux, solve it and increase the value to solve the model again...

Hi everybody. This is my first post in this forum. I am working with COMSOL MULTIPHYSICS and I am trying to model a laboratory burner (Meker burner) heating a copper disc placed above the burner. I am modelling the burner as a boundary setting of heat flux entering the domain. I have obtained a...

Hi everybody, I'm a new user of Comsol Multiphysics and Comsol script. And I'm working on a conduction problem, with convective and radiative heat flux at one boundary. The geometry is quite simple: 2D rectangle. But the upper boundary is supposed to be moving with time (linear or exponential...

I want to solve a system of differential equations in comsol multiphysics. So far I have not figured out how to enter a 2nd pde in addition to the existing pde. Is this possible, and how?

Hi. I need some help with Comsol Multiphysics. I want to know can I use this software to solve a system of ODEs only. If so, how can I do this. Best regards.

Hello Everyone, I'm new with comsol and would appreciate some help from anyone willing to help me out. Ok so here's my question, I'm trying to perform an Eigenfrequency Analysis for an electrostatic micro-rotor. The problem is I want to take in consideration the effects of the surrounding...

Heat transfer and Fluid Mechanics, COMSOL Help Hello, I am trying to couple heat transfer and fluid mechanic together, model is a simple concrete slab (3'x6')with a water pipe beneath it and along 3' direction. For heat transfer, the heat flux will apply on the surface of concrete slab...

hi all, I'm a newbie here. i'm currently encountering problems trying to construct and simulate a 3-d t-junction. can someone here enlighten me? thks

Hi everybody, newbie here... im doing a modelling work with comsol and have a problem of solving using navier-stoke equation for the boundary. is it possible to discretize the boundary condition into several parts and apply different condition in each segment? thank you beforehand,

Hi everybody, newbie here...:smile: im doing a modelling work with comsol and have a problem of solving using navier-stoke equation for the boundary. is it possible to discretize the boundary condition into several parts and apply different condition in each segment? thank you beforehand,

My COMSOL model consists of a suspended membrane supported by two arms. At low pressure, the membrane temperature will increase upon thermal irradiation. I want to simulate the temperature rise as a function of pressure but don't know how to include the gaseous conductance. Any suggestion...

Hey everyone, I have been using COMSOL to study oxygen diffusion through a membrane coupled with a surface reaction at one end of the membrane. It is a 3D cylindrical model and when I want the data values for oxygen concentration at the reaction boundary, it gives me a list of garbled values...

Hi, I am pretty newish to comsol. Im having a simple problem in constructing my geometry How exactly can you draw lines from one point to another when you don't know the coordinates of the points? My geometry is pretty complicated and its difficult to find the coordinates of the points. So is...

Hi everyone, I've just started to use COMSOL for the study of a simple cantilever beam and I'm facing some problems while calculating the eigenfrequencies and the frequency-response. I use the 3D MEMS Module>Solid, Stress-Strain. I create a 500e-6,100e-6,10e-6 box. From the Sub-domain menu...

hey guys... can someone here, expert in COMSOL ,help me out ?:rolleyes: I am stuck in my work and seek some guidence.. Regards, Chirag