Electric field not adjusting with moving mesh
Hi, I have created a model which is effectively a capacitor with a moving plate. I have ground electrodes on the fixed top plate and +/-100V electrodes on the bottom moving plate. I am using ALE with...
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 ArticleTime Dependent Study of an Airfoil- Lift Coefficient
Hi, I am trying to learn how to calculation the lift and drag coefficient of an airfoil running a time-dependent study. Below are the boundary conditions. Re ~2000 Inlet- Inlet U*step1(t[1/s]) Top and...
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 Articledesign and analysis of 2d single axis capacitive accelerometer
hi, While assigning the material air for domain i am getting the error in material contents for young"s modulus and poisson's ratio i.e it is showing stop signal. please can u explain me this error....
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 Articlecomplex relative permittivity: definition of the imaginary part in a look-up...
Dear all, I'm quite confused right now as regards the definition of the complex relative permittivity. In a previous discussion I've read that a complex permittivity of a+jb should be entered as a-jb...
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 ArticleRF: Emitting planar light from PORT (3D)
Hello my friends. I am trying to construct a model where the port is placed along the y,z-axis and emits light in the x-direction. However, I do not want to just emit light normal to port's surface, ie...
View ArticleFixed time steps
While simulating our case, we have used strict time step with maximum as 1800 seconds. But still, it is taking a time step of 0.1 sometimes. This is making our simulation quite slow during the middle...
View ArticleSpiral 3D inductor Geometry
Hello I am trying to simulate a 3D spiral inductor, but I cannot find the right geometric shapes given in Comsol 4.3a to build this coil. I have attached an image of the intended coil I want to build I...
View ArticleSpiral 3D inductor Geometry
Hello I am trying to simulate a 3D spiral inductor, but I cannot find the right geometric shapes given in Comsol 4.3a to build this coil. I have attached an image of the intended coil I want to build I...
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 Articleionisation air
Hey. I can not seem to model the ionization of air just using electro magnetism, temperature and pressure. Can anyone advise me or send process? Thank you.
View ArticleGraph vs Phase with Frequency Domain Solver?
Hello, Im sure this is pretty simple, but im still learning COMSOL 4.1. Im using a frequency domain solver, and I have a solution, I can build a video across a full harmonic, with the dynamic data...
View ArticleDielectrophoresis
Hi there. I tried to observe the particle movement effect through the "particle tracing for fluid module". However, the result of particle trajectories didn't show up any particle movement. Please...
View ArticlePhysics for a elastomeric vibration isolator.
Good morning. I'm almost finished with my model. The model consists in : 1 - Base. ( Base ) 2 - Elastomeric Rubber. ( Borracha) 3 - Lid. (Tampa) 4 - Screw Hole.( Parafuso ) The Screw Hole receive the...
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 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 Article
