<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Pei, Jie</style></author><author><style face="normal" font="default" size="100%">Jun Chen</style></author><author><style face="normal" font="default" size="100%">Zhen-Su She</style></author><author><style face="normal" font="default" size="100%">Hussain, Fazle</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Model for propagation speed in turbulent channel flows</style></title><secondary-title><style face="normal" font="default" size="100%">Physical Review EPhysical Review E</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Oct</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">4 Pt 2</style></number><edition><style face="normal" font="default" size="100%">2012/12/12</style></edition><volume><style face="normal" font="default" size="100%">86</style></volume><pages><style face="normal" font="default" size="100%">046307</style></pages><isbn><style face="normal" font="default" size="100%">1550-2376 (Electronic)1539-3755 (Linking)</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The propagation speed Vc of the streamwise velocity fluctuations u&amp;#039; in turbulent channel flows is calculated using direct numerical simulation (DNS) data at four Mach numbers (M=0, 0.8, 2.0, and 3.0). The profiles of Vc are shown to display remarkable similarity at different M. Quantitative models are developed based on a statistical structure called Velocity-Vorticity Correlation Structure (VVCS), defined as the vorticity region most correlated to velocity fluctuations at a fixed location. Good agreement with DNS-measured propagation velocities is obtained throughout the channel and for all M. The result confirms earlier speculation that the near-wall propagation is due to an advection by coherent vortex structures, and validates the concept of the VVCS.</style></abstract><accession-num><style face="normal" font="default" size="100%">23214677</style></accession-num><notes><style face="normal" font="default" size="100%">Pei, JChen, JShe, Z-SHussain, FengResearch Support, Non-U.S. Gov&amp;#039;tPhys Rev E Stat Nonlin Soft Matter Phys. 2012 Oct;86(4 Pt 2):046307. doi: 10.1103/PhysRevE.86.046307. Epub 2012 Oct 10.</style></notes><auth-address><style face="normal" font="default" size="100%">State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Aerospace Engineering, College of Engineering, Peking University, 100871 Beijing, China.</style></auth-address></record></records></xml>