Hi all,

I'm stuck with how to define

given

say I'm incrementing and at some defined value. I should have a 2D grid with and down either side and the central values will be .

How do I calculate ?

Is it simply

where is defined as

Printable View

- January 31st 2010, 10:13 AMdavefultonArakawa's C grid
Hi all,

I'm stuck with how to define

given

say I'm incrementing and at some defined value. I should have a 2D grid with and down either side and the central values will be .

How do I calculate ?

Is it simply

where is defined as - January 31st 2010, 01:07 PMHallsofIvy
I'm not sure what you want here. u is simply some function that is defined at each node of grid. is the value of that function at the i,j-node. It is NOT a derivative, it is the function itself. is an approximation to on that grid and, similarly, is an approximation to .

- January 31st 2010, 02:38 PMdavefulton
is a velocity component. As is . I'm using to solve Euler's equations.

Thank you for your help