equations in Hirsch's numerical computation of internal and external flows - 2nd edit
Hi, i am following a book, Hirsch's numerical computation of internal and external flows - 2nd edition, vol 1. I have a task to extend a set of equations from 2d to 3d but i cant understand how Hirsch defines/derives his 2d numerical solution. The equations i refer to are (12.4.27).
I cant understand how he gets the equations can anyone explain? |
http://postimg.org/image/3w9v1ko97/http://postimg.org/image/3w9v1ko97/http://postimg.org/image/3w9v1ko97/ can anyone explain how the equations 12.4.27 are formed/derived to me please :)
I know that the scheme is second order central difference but would like to be able to derive the equations from Taylor series expansion. |
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I do not have the book at this moment, the grid is non-uniform and staggering is used? I see the use of linear averaging for the mid-section values |
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you should know from the book the arrangement of the staggered variables to verify the equation |
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is this what you are talking about? |
Yes. ;)
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http://imageshack.com/a/img923/3116/prEM4i.png |
please help fellow cfders.:)
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