Tutorial 1: Converting PDE to algebraic equation using FD approximation

[@hassanainhaider8542]

Outstanding sir But please explain the steps more briefly.

[@ganeshgujar3340]

sir in this tutorial i didnt understood that how the values come 100, 1000 and 400 can anybody please explain me or give me hint

[@ErenGuerrier97]

pick a grid point ,move along y axis up and down and then write 400 in front of it, again around the same grid point move along x axis back and forth and then write 100 in front of it. lastly put -1000 in front of where the point you picked. this will only work for central difference scheme when the delta x is 0.1 and delta y is .05 meter.

[@jhonathwensenbermejiagonza2954]

Replace the values and solve. 100w32-200w22+400w23-800w22=-1000 100w32-1000w22+400w23=-1000