Cylindrical anisotropic stiffness
Hi, Problem: Imagine a cylindrical shell, with a certain wall thickness. The material properties of the shell have an isotropic density (rho) and an anisotropic stiffness described by a constant radial...
View ArticleMeaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
Hi there, can anybody tell me what COMSOL means by the word "node" in contrast to "vertex" or "degree of freedom" when it comes to the discretization? I have...
View ArticleMeshing over large changes in scale
Hi Everyone, I am trying to mesh a geometry which has a large difference in scale between components (from mm to nm scales). The free mesher always fails with Error: 4029 Failed to insert point. - x...
View ArticleHT-block sliding with radiation
Hi Ivar I wanted to once again thanks for your help. so I did the HT-block sliding in 3D and I got what I wanted now I need to add radiation to it. I could add radiation and detect heat flux radiosity...
View ArticleAttempting to find total drag force on an object
I'm fairly new to COMSOL and haven't been able to find any really detailed guides on how to go about this. I've currently got two problems that I can't figure out how to solve. 1) When I solve the...
View ArticleDerivative of Interpolation Functions
Dear all, I am trying to understand if, given an interpolation function (defined by a table of points in an external file like *.txt file) it is possible to define the derivative (spatial) of the...
View ArticleFluid flow channel in cantilever beam
Hello, My model is the following: a cantilever beam has one longitudinal channel containing a fluid flow. My goal is to find the effects of the fluid flow (viscosity, velocity, size of the channel) on...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View Articlesimulating moving piston
There are 4 components in my model; blood, blood vessel, brain tissue, and piston Blood and blood vessel are surrounded by brain tissue and piston crushes down brain tissue with 1mm depth. When I used...
View ArticlePloting ?
Hi, How do I control my plots? window size, fonts size, label positioning? I miss on a 2D-surface plot with height-expression the labels on my axis? the snapshot window is too small whenever i want the...
View Articlecurved beam
Hi, How can I change the radius of curvature of a reinforced concrete straight beam inorder to come up with a curved beam?
View ArticleSimulating pull-in with contact pair
Hi everyone, I followed the model name "electrostatically actuated cantilever" in model library to build my own model - an RF MEMS shunt switch with fixed fixed beam. In the "electrostatically actuated...
View ArticleHeat Transfer
Actually, I need to give boundary condition to one of the part of my system. At that part, I will use cryocooler of capacity 1 W at 4.2 K, how can I give this boundary condition to particular part. My...
View ArticleTime Dependent Studies
Hi, I'm setting up a model with a lot of my own equations, and the whole thing is dependent on time. How do I refer to results from a previous/particular time step in my equations? Thanks, Rich
View ArticleMultiple concentration step function
Hi, Have a great day. I am a new user of comsol 3.5 version, currently, I am working with chronoamperometry and I am trying to simulate that one using comsol by multiple concentration step functions....
View ArticleThermal Stress Evaluation without Solving Heat Transfer Physics
I am trying to generate Thermal Stress about the domain of a spherical body with a coupled 'Solid Mechanics' and 'Heat Transfer in Solids' physics. Instead of actually solving the heat transfer...
View Article2D to 3D
Hey all, I successfully designed a spiral structure in 2d and got the desired results. Now I wanna transfer my model to 3d. I read few threads and tried to export my 2d file, When I import it in 3d ,...
View Articlethe free vibration of the cantilever
Hi everyone: The initial displacement D=1.05mm, is placed on the end of the cantilever beam, to solve the velocity response of the beam end. First, I select space dimension 2D, and add physics Beam,...
View ArticlePermanent Magnet simulation
Hello Everybody, I have posted before and I am doing it again though I am little bit on the knowledgable side. I am trying to simulate a permanent magnet using the Br option in the Magnetic Field, No...
View ArticleShock Tube Initial coditions
Hello. My question is in relation to the shock tube model, I tried changing the initial conditions of pressure and density generating two steps for each, but in doing so the solution no longer...
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