Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

How to apply a step function electric field?

Mohammad Karimi

Please login with a confirmed email address before reporting spam

Hi, I am trying to simulate a structure in RF or Electrostatic module under a step fucntion electric field as an incident field. I would apprecite if anyone can help me as I have alwayse used harmonic sinusoidal signals as input fields by now.


3 Replies Last Post Oct 24, 2017, 5:46 AM EDT
Vasily Kozhevnikov

Please login with a confirmed email address before reporting spam

Posted: 11 months ago Oct 20, 2017, 9:33 AM EDT

Hi,

Just define a step function you like in Definition -> Function -> Step and add it to Electric field component boundary or elsewhere in RF/Electrostatics

Hi, Just define a step function you like in Definition -> Function -> Step and add it to Electric field component boundary or elsewhere in RF/Electrostatics

Mohammad Karimi

Please login with a confirmed email address before reporting spam

Posted: 11 months ago Oct 21, 2017, 10:16 PM EDT

Thank you very much. I can define a step function. However, I still do not understand how should I relate this function to my initial or boundary conditions. I actually need to stimulate my system with a time-dependant electric field or boundary condition.

Thank you very much. I can define a step function. However, I still do not understand how should I relate this function to my initial or boundary conditions. I actually need to stimulate my system with a **time-dependant** electric field or boundary condition.

Lasse Murtomäki

Please login with a confirmed email address before reporting spam

Posted: 11 months ago Oct 24, 2017, 5:46 AM EDT

If your step function has the name step1, call it step1(t), multiplied by whatever constant you have in the boundary condition. Or anywhere you need it. Is this what you asked?

If your step function has the name step1, call it step1(t), multiplied by whatever constant you have in the boundary condition. Or anywhere you need it. Is this what you asked?

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.