How do i can input electron mobility as a function of electric field?
Hi every one, Im trying to input mobility of electron as a function of Electric Field but it give me error. Thanks Azadeh
View ArticleAsk the question about the particle tracing module.
I have a question when I have used particle tracing module(fpt). Because I try to utilize the condition of Particle-Particle Interaction. I don’t know how to define the interaction force of particle. E...
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 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 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...
View ArticleInductance of a parallel plate transmission line
I'm trying the find the lumped element parameters of a parallel plate transmission line. I've been using the "energy method" described on pages 87 and 88 of the AC/DC Module Users Guide. I used the...
View Articlehow to plot graph b/w preeure vs displacement
i need procedure how to plot grap for pressure sensor and how to observe pressure and displacement value......
View ArticleThermal expansion model
I built a thermal expansion model, at temperature 700K. I want to examine the stress distritubion of the cross-section inside the expanded sample, how do I do that? Also, is there a way to visualize...
View ArticleMaxwell Stress Tensor
Hello all, I'm new to Comsol and Im having a little difficulty getting my head around how the Maxwell Stress Tensor operates. I understand its operation when applied to parallel wires (Like in the...
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 Articlethermal BC's across the interanl surface between the heat sink and air in the...
n Model Library : Heat transfer module : Tutorial models: heat sink . It is considered the temperature filed is continuous across the internal surface between the heat sink and the air channel. first...
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 ArticlePlasticity - Cyclic Hardening
Hi all, I am modelling a process where a steel plate is subject to cyclic forces that cause plastic deformation. As the process is cyclic I am inclined to use the kinematic hardening option - I am...
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