Changes between Version 13 and Version 14 of u/erica/CylindricalGravity

Timestamp:

01/07/15 11:42:37 (10 years ago)

Author:

Erica Kaminski

Comment:

—

u/erica/CylindricalGravity

@@ -72 +72 @@
 -1 corresponds to left/down, and +1 to right/up. So this states the 1st cell in the stencil (m=1) has a position to the left of the center cell in the i=1 (x) direction, and the 2nd cell is to the right. The 3rd and 4th cell has a 0 offset in x (because they are above and below the center cell). This is why their offsets are listed in the 2nd row of the table. Again, the center cell itself (m=0) has 0 offsets from itself in both directions.
 
+The stencil values are also set here for regular, Cartesian geometry. They need to be modified later in the code for use with 2.5 geometry. 
+
+'''Stencil values''' is an (0:2*ndim) array. For 2D then, stencil values is 5 elements long. It is initialized with the following values which are the coefficients for the Poisson matrix equation described above for Cartesian geometry:
+
+'''Stencil values (m) = '''
+
+|| m || 0 || 1 || 2 || 3 || 4 || 5 || 
+|| stencil values(m)|| -4 || 1 || 1 || 1 || 1 || 1 ||