Eddies against the wall

Jul 27, 2010

Fluids experts writing in the journal Physics of Fluids, which is published by the American Institute of Physics, are projecting it will be many decades before we can accurately probe the properties of turbulence near walls. High-Reynolds-number flows (which are prone to turbulence) are critically important in aeronautics, naval applications, energy conversion processes, manufacturing, mixing and dilution of pollutants, and in many aspects of climate modeling, according to Professor Hassan Nagib at the Illinois Institute of Technology in Chicago.

Recent advances in computing have allowed great strides to be made in modeling , significantly modifying the traditional fluids framework, but only for flows involving low Reynolds numbers. Future developments in high-Reynolds-number flows depend on improved measuring techniques and the construction of new facilities, say Nagib and his colleagues.

The paper reviews the salient advances that have introduced new elements into the theoretical foundations of fluids and challenged textbook orthodoxy.

"We also highlight aspects where differences of opinion persist," says Nagib, "which we hope might mark the beginning of their resolution." By outlining the gaps in our understanding that still exist, the authors hope, in principle, to provide a roadmap for future research on the topic.

Explore further: Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field

More information: The article, "Wall-bounded turbulent flows at high Reynolds numbers: Recent advances and key issues" by I. Marusic, B. J. McKeon, P. A. Monkewitz, H. M. Nagib, A. J. Smits, and K. R. Sreenivasan was published online in the journal Physics of Fluids on June 29, 2010. See: link.aip.org/link/PHFLE6/v22/i6/p065103/s1

Provided by American Institute of Physics

2.7 /5 (3 votes)
add to favorites email to friend print save as pdf

Related Stories

NIST releases major update of popular REFPROP database

Apr 13, 2007

The National Institute of Standards and Technology has released an expanded and upgraded version of a popular database, a computer package for calculating the properties and modeling the behavior of fluids.

NJIT mathematician to study thin film science

Dec 02, 2005

Ever wonder how manufacturers produce the thinnest and finest materials for cell phone displays and even smaller electronic products? If so, you are entering the burgeoning new world of "thin film" science and the life work ...

Chaos, Twist Maps and Big Business

Jul 26, 2004

Obscure mathematical ideas developed back in the 1980s could solve current problems of mixing fluids at the microscale, and revolutionise the technology, reports an article in Science this week (23 July 2004). ...

Mathematicians promise animation revolution

Mar 30, 2005

CSIRO mathematicians are combining art and science to solve one of the last big challenges in animation – fluids. They are aiming to develop techniques for fluid animations that are so realistic audiences wil ...

Rare volcanic plumes create uncommonly dangerous ash flows

Mar 14, 2006

Three unique photographs of a recent volcanic eruption in a remote part of Ecuador show a plume unlike any previously documented, and hint at a newly recognized hazard, say scientists at the University of Illinois ...

Recommended for you

User comments : 0