Graphics Reference
In-Depth Information
the sample points with respect to the grid. However, an implementation
obviously should use integer indices. A standard convention is needed, for
example:
p(i,j,k) = p i,j,k ,
(2.14)
u(i,j,k) = u i− 1 / 2 ,j,k ,
(2.15)
v(i,j,k) = v i,j− 1 / 2 ,k ,
(2.16)
w(i,j,k) = w i,j,k− 1 / 2 .
(2.17)
Then for an nx
×
×
nz grid, the pressure is stored in an nx
×
×
nz
array, the u component in a (nx+1) × ny × nz array, the v component in a
nx × (ny+1) × nz array, and the w component in a nx × ny × (nz+1) array.
ny
ny
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