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

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- Jan 31st 2010, 11:13 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 - Jan 31st 2010, 02:07 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 .

- Jan 31st 2010, 03:38 PMdavefulton
is a velocity component. As is . I'm using to solve Euler's equations.

Thank you for your help