Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

MATLAB 3D Finite different method using matlab

  1. May 10, 2015 #1
    Can anyone show me how to solve the 3D diffusion equation which has been modeled into FDM by using matlab?
     
  2. jcsd
  3. May 10, 2015 #2
    Suppose your stencil only uses nearest and next nearest neighbors on a cubic periodic domain with N lattice points in each direction. Define Im = (1:N)-1;Im(Im==0)=N; and Ip = 2:N+1;Ip(Ip==N+1)=1; Define your system and matrices and use A(lp,lp,lm) ## \sim A_{i+1,i+1,i-1} ## in your stencil.
     
  4. May 10, 2015 #3

    Can I learn further from you?
     
  5. May 11, 2015 #4
    You are sure you don't want to try yourself first? Also you haven't mentioned which time update algorithm you are using.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook