essence of upwinding

November 18, 2001, 21:21

I EVER believed that upwinding is an effective means to introduce numerical dissipation into the scheme. It is also this numerical dissipation that makes upwinding diserable in shock capturing.

-Are these claims correct?

However, as we known, Lax-Friedrichs is a contral method, and it is more dissipative than the first-order upwind scheme.

How to justify the effect of upwinding of a numerical scheme? For dissipation or for the correct influence domain?

November 18, 2001, 21:29

Both claims are correct!

In my opinion, dissipation and influence domain go hand in hand (please read my post below yours, which tries to explain inviscid drag).

November 18, 2001, 21:21	essence of upwinding	#1
Paul Guest Posts: n/a	I EVER believed that upwinding is an effective means to introduce numerical dissipation into the scheme. It is also this numerical dissipation that makes upwinding diserable in shock capturing. -Are these claims correct? However, as we known, Lax-Friedrichs is a contral method, and it is more dissipative than the first-order upwind scheme. How to justify the effect of upwinding of a numerical scheme? For dissipation or for the correct influence domain?

November 18, 2001, 21:29	Re: essence of upwinding	#2
Axel Rohde Guest Posts: n/a	Both claims are correct! In my opinion, dissipation and influence domain go hand in hand (please read my post below yours, which tries to explain inviscid drag).

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