Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Postdocs 
 Visitors 
 Students 
 Research 
 Publications 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 Quantum Lunch Archive 
 P/T Colloquia 
 Archive 
 Ulam Scholar 
 
 Postdoc Nominations    
 Postdocs 
 CNLS Fellowship Application 
 Students 
 Student Program 
 Visitors 
 Description 
 Past Visitors 
 Services 
 General 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Monday, January 26, 2009
3:00 PM - 4:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Colloquium

The friction factor and roughness-induced criticality in turbulent pipe flow in two and three dimensions

Nigel Goldenfeld
University of Illinois at Urbana-Champaign

Are turbulence and critical phenomena analogous to one another? I demonstrate the connection, introducing the concept of roughness-induced criticality, and analyze friction factor data for turbulent rough-pipe flows, taken by Nikuradze in 1933. These data can be interpreted using a momentum-transfer theory due to Gioia and Chakraborty and extended to two-dimensional (2D) turbulent soap film flows. I present the results of direct numerical simulations in 2D which show strong confirmation of both roughness-induced criticality and the momentum-transfer predictions for the friction factor.

Host: Mahesh Bandi, MPA-10/CNLS