Program 8 Unitless 1D FDTD Open Boundary with Courant Factor Greater than 1 & Hard source

1D FDTD with Courant factor > 1 results in instability and ultimately results in blow up

Youtube Links :- http://www.youtube.com/watch?v=DilyYwLbIZI

Written for Course :-
Computational Electromagnetics, Fall 2011
Department of Electrical Engineering
Indian Institute of Technology Madras (IITM)
Chennai - 600036, India

Authors :-
Sathya Swaroop Ganta, B.Tech., M.Tech. Electrical Engg.
Kayatri, M.S. Engineering Design
Pankaj, M.S. Electrical Engg.
Sumantra Chaudhuri, M.S. Electrical Engg.
Projesh Basu, M.S. Electrical Engg.
Nikhil Kumar CS, M.S. Electrical Engg.

Instructor :-
Dr. Ananth Krishnan
Assistant Professor
Department of Electrical Engineering
Indian Institute of Technology Madras
http://www.ee.iitm.ac.in/~ananthk

Description :-

In this program, the Courant-Friedrich-Levy factor (or Courant Factor) is deliberately pushed Greater than 1 for an exponentially increasing unstable solution. It should be noted that for 1D FDTD, the magic FDTD timestep corresponds to Courant Factor of 1. Courant Factors Greater than 1, are inherently unstable. If you find instability in your program you should now know that you have a Courant violation with Courant Factor greater than 1.