<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Zilitinkevich, Sergej</style></author><author><style face="normal" font="default" size="100%">Elperin, T.</style></author><author><style face="normal" font="default" size="100%">Kleeorin, N.</style></author><author><style face="normal" font="default" size="100%">Rogachevskii, I.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Energy- and flux-budget (EFB) turbulence closure model for stably stratified flows. Part I: steady-state, homogeneous regimes</style></title><secondary-title><style face="normal" font="default" size="100%">Boundary-layer Meteorology</style></secondary-title><tertiary-title><style face="normal" font="default" size="100%">From the issue entitled &quot;Atmospheric Boundary layers: Nature, Theory and Applications to Environmental Modelling and Security&quot;</style></tertiary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Anisotropy</style></keyword><keyword><style  face="normal" font="default" size="100%">Critical Richardson number</style></keyword><keyword><style  face="normal" font="default" size="100%">Eddy viscosity</style></keyword><keyword><style  face="normal" font="default" size="100%">Heat conductivity</style></keyword><keyword><style  face="normal" font="default" size="100%">Kinetic</style></keyword><keyword><style  face="normal" font="default" size="100%">potential and total turbulent energies</style></keyword><keyword><style  face="normal" font="default" size="100%">Stable stratification</style></keyword><keyword><style  face="normal" font="default" size="100%">Turbulence closure</style></keyword><keyword><style  face="normal" font="default" size="100%">Turbulent fluxes</style></keyword><keyword><style  face="normal" font="default" size="100%">Turbulent length scale</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.springerlink.com.pva.uib.no/content/l474p1v14h966357/</style></url></web-urls><related-urls><url><style face="normal" font="default" size="100%">http://www.nersc.no/sites/www.nersc.no/files/fulltext-9.pdf</style></url></related-urls></urls><number><style face="normal" font="default" size="100%">2</style></number><publisher><style face="normal" font="default" size="100%">Springer</style></publisher><volume><style face="normal" font="default" size="100%">125</style></volume><pages><style face="normal" font="default" size="100%">167-191</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We propose a new turbulence closure model based on the budget equations for the key second moments: turbulent kinetic and potential energies: TKE and TPE (comprising the turbulent total energy: TTE = TKE + TPE) and vertical turbulent fluxes of momentum and buoyancy (proportional to potential temperature). Besides the concept of TTE, we take into account the non-gradient correction to the traditional buoyancy flux formulation. The proposed model permits the existence of turbulence at any gradient Richardson number, Ri. Instead of the critical value of Richardson number separating—as is usually assumed—the turbulent and the laminar regimes, the suggested model reveals a transitional interval, 0.1 &lt; Ri &lt; 101Ri1 , which separates two regimes of essentially different nature but both turbulent: strong turbulence at Ri &lt;&lt; 1Ri1 ; and weak turbulence, capable of transporting momentum but much less efficient in transporting heat, at ${\rm Ri} &gt; 1$Ri1 . Predictions from this model are consistent with available data from atmospheric and laboratory experiments, direct numerical simulation and large-eddy simulation. </style></abstract><auth-address><style face="normal" font="default" size="100%">NERSC</style></auth-address></record></records></xml>