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Forum: Main CFD Forum

October 13, 2011, 18:32

Replies: 12

Basic questions on CFD theory

Views: 4,142

Posted By leflix

Hi CThib, check this post: ...

Hi CThib,

check this post:

http://www.cfd-online.com/Forums/main/91593-when-use-upwind-central-differencing-schemes.html

as well as:
http://www.cfd-online.com/Wiki/Appro...grids_-_Common...

Forum: Main CFD Forum

October 12, 2011, 12:52

Replies: 12

Basic questions on CFD theory

Views: 4,142

Posted By leflix

ok let's do that ! ;)

ok let's do that ! ;)

Forum: Main CFD Forum

October 12, 2011, 08:08

Replies: 12

Basic questions on CFD theory

Views: 4,142

Posted By leflix

not exactly again !!! ;) ...

not exactly again !!! ;)

(u(n+1)_i-u(n)_i)/delta t =-(u(n)_i - u(n)_i-1) / delta x

please cfdnewbie you should take some vacancies :)

no but this is a typo for sure !

Forum: Main CFD Forum

October 12, 2011, 04:30

Replies: 12

Basic questions on CFD theory

Views: 4,142

Posted By leflix

Hi Cfdnewbie, you are 100% right about the...

Hi Cfdnewbie,

you are 100% right about the fact that upwind scheme is stable (under CFL condition) but unfortunately for you the scheme you just proposed to Cthib is not he upwind scheme but the...

Forum: Main CFD Forum

October 11, 2011, 19:02

Replies: 12

Basic questions on CFD theory

Views: 4,142

Posted By leflix

Sorry cfdnewbie, but if you start in your example...

Sorry cfdnewbie, but if you start in your example with a discretizing scheme (forward 1st derivative) which is unconditionnally unstable for this well known hyperbolic equation, I'm afraid you will...

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