Space Forum / Space Flight / March 2006

I read the article you linked to. I am not a subscriber, so I couldn't
read the original source.

http://snipurl.com/my0w

They want $23 to sell me the PDF file. I think that is too much.

Somebody needs to précis the article better than the PhysOrg.com
source.

I googled the article title and found one better description of the
research.
http://focus.aps.org/story/v17/st6

"... "Since the mid 1950's roughness elements have been known to
trigger transition [to turbulence]," Fransson says. But "we put in
roughness elements, and we show that we can delay transition. This is
very new." He suggests that a similar strategy might suppress chaotic
behavior in situations ranging from lasers to fusion plasmas.

"What is really slick about it is it's a passive strategy," in contrast
to complex schemes that "actively" eliminate turbulence after it has
developed, says Edward White of Case Western Reserve University in
Cleveland, Ohio. But he cautions that the clean experimental result may
not capture what happens in the real world. George Karniadakis of Brown
University agrees that the new result is a "good contribution," but he
suspects that the disks will cause extra pressure drag that may
overwhelm any reductions. Fransson says the disks only increase
pressure drag by 3.5% but that the team hasn't yet measured the net
drag. ..."