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<title>Tag:turbulence</title><link>http://www.isheu.com/tag_14160_3_turbulence.aspx</link>
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<title>Tag:turbulence</title> 
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<title><![CDATA[大渦模擬的流量在過去一個正方形cylinder.pdf(881.39 KB)]]></title>
<link>http://www.isheu.com/data_414_3.aspx</link>
<pubDate>Sat, 05 Jul 2008 03:49:31 GMT</pubDate>
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<author>狼</author>
<comments>http://www.isheu.com/data_414_3.aspx</comments> 
<category>turbulence</category> 
<source url="http://www.isheu.com/tag_14160_3_turbulence.aspx">Tag:turbulence</source> 
<description><![CDATA[湍流是一種現象，經常出現在性質上和這也是一個情況presentin幾乎所有的工業應用。在這方面的工作，模擬湍流渦脫落froma藍光？機構廣場缸已使用的大渦模擬技術（組）&nbsp;。這項工作的目標是實施這種類型的模擬在平行phoenics&nbsp;andvalidate結果，以便申請他們以實際案例一樣，藍光？機構射流燃燒器。該lessmagorinsky模型和輔助計算，像亞當-&nbsp;Moulton著高階的時間計劃，有beenimplemented作為Fortran的子程序到代碼。湍流皂瓦特有一個雷諾數of21400和它對應到一個皂瓦特的水超過一平方米的缸。這一直是以前使用的byseveral作者，以驗證計算流體力學湍流模型。在&#30349;ences該組的模型和numericalschemes分析和最重要的皂瓦特參數計算。結果同意withexperimental和數值數據。此外，比較使用本港就業輔導組和reynoldsaveraged&nbsp;Navier&nbsp;-&nbsp;Stokes方程的K嗎？模型已經作出一些邸&#29991;rences&nbsp;arepointed&nbsp;。結果，讓作出結論，認為該組的模型，提高了精確的thek&nbsp;〔模型和轉載了充分皂瓦特議案和渦脫落。仿真hasbeen表現在平行的方式對不同的節點數量，一個66處理器的群集。該parallelcalculation結果在顯著痗螞蟻相比，節省時間與順序（單處理器）&nbsp;run.the下一步將要套用這個模式來一藍光？機構癮我在為了研究interactionbetween動盪和化學工業在燃燒器。]]></description>
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<title><![CDATA[TURBULENCE MODELLING OF OIL SLICK.pdf(272.27 KB)]]></title>
<link>http://www.isheu.com/data_29202_3.aspx</link>
<pubDate>Thu, 11 Dec 2008 15:38:10 GMT</pubDate>
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<author>lym</author>
<comments>http://www.isheu.com/data_29202_3.aspx</comments> 
<category>turbulence</category> 
<source url="http://www.isheu.com/tag_14160_3_turbulence.aspx">Tag:turbulence</source> 
<description><![CDATA[The&nbsp;motion&nbsp;of&nbsp;a&nbsp;lock-release&nbsp;oil&nbsp;slick&nbsp;as&nbsp;an&nbsp;immiscible&nbsp;two-fluid&nbsp;gravity&nbsp;current&nbsp;is&nbsp;numerical&nbsp;studied&nbsp;by&nbsp;a&nbsp;finite&nbsp;difference&nbsp;algorithm&nbsp;based&nbsp;on&nbsp;the&nbsp;volume&nbsp;of&nbsp;fluid&nbsp;(VOF)&nbsp;method&nbsp;for&nbsp;the&nbsp;basic&nbsp;formulation&nbsp;and&nbsp;a&nbsp;rigid&nbsp;cover&nbsp;approximation&nbsp;for&nbsp;the&nbsp;open&nbsp;free&nbsp;surface.&nbsp;Detailed&nbsp;numerical&nbsp;simulation&nbsp;with&nbsp;careful&nbsp;model&nbsp;validation&nbsp;reveals&nbsp;the&nbsp;existance&nbsp;of&nbsp;turbulence&nbsp;and&nbsp;the&nbsp;adaptability&nbsp;of&nbsp;the&nbsp;renormalization&nbsp;group&nbsp;(RNG)&nbsp;model&nbsp;for&nbsp;the&nbsp;Reynolds-stress&nbsp;closure&nbsp;in&nbsp;the&nbsp;case&nbsp;of&nbsp;the&nbsp;oil&nbsp;slick.&nbsp;The&nbsp;evolution&nbsp;of&nbsp;turbulence&nbsp;kinetic&nbsp;energy&nbsp;and&nbsp;turbulent&nbsp;viscosity&nbsp;is&nbsp;characterised,&nbsp;and&nbsp;asymptotic&nbsp;self-similar&nbsp;spreading&nbsp;laws&nbsp;are&nbsp;well&nbsp;reproduced.&nbsp;The&nbsp;mechanism&nbsp;for&nbsp;the&nbsp;transition&nbsp;from&nbsp;an&nbsp;initial&nbsp;gravity-inertial&nbsp;phase&nbsp;to&nbsp;a&nbsp;second&nbsp;gravity-viscous&nbsp;phase&nbsp;is&nbsp;shown&nbsp;to&nbsp;be&nbsp;the&nbsp;relaminarization&nbsp;effect&nbsp;of&nbsp;the&nbsp;initially&nbsp;highly&nbsp;turbulent&nbsp;slick.]]></description>
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<title><![CDATA[Research on Flow Patterns and Channel Processes in a Channel with Complex Cross Section.pdf(352.80 KB)]]></title>
<link>http://www.isheu.com/data_35087_3.aspx</link>
<pubDate>Thu, 18 Dec 2008 10:44:39 GMT</pubDate>
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<author>cyglz_chen</author>
<comments>http://www.isheu.com/data_35087_3.aspx</comments> 
<category>turbulence</category> 
<source url="http://www.isheu.com/tag_14160_3_turbulence.aspx">Tag:turbulence</source> 
<description><![CDATA[he&nbsp;distribution&nbsp;of&nbsp;velocity&nbsp;is&nbsp;one&nbsp;of&nbsp;basic&nbsp;issues&nbsp;in&nbsp;river&nbsp;dynamics.&nbsp;Based&nbsp;on&nbsp;the&nbsp;experimental&nbsp;data&nbsp;measured&nbsp;by&nbsp;ADV&nbsp;in&nbsp;the&nbsp;flume&nbsp;of&nbsp;State&nbsp;Key&nbsp;Laboratory&nbsp;of&nbsp;Hydraulics&nbsp;(SKLH),&nbsp;this&nbsp;paper&nbsp;analyzed&nbsp;the&nbsp;vertical&nbsp;distribution&nbsp;of&nbsp;point&nbsp;velocity&nbsp;and&nbsp;the&nbsp;varying&nbsp;law&nbsp;of&nbsp;turbulence&nbsp;intensity&nbsp;for&nbsp;movable&nbsp;bed&nbsp;in&nbsp;an&nbsp;asymmetric&nbsp;compound&nbsp;channel.&nbsp;Above&nbsp;certain&nbsp;relative&nbsp;height,&nbsp;the&nbsp;streamwise&nbsp;point&nbsp;velocity&nbsp;follows&nbsp;the&nbsp;logarithmic&nbsp;distribution.&nbsp;Under&nbsp;the&nbsp;location,&nbsp;the&nbsp;velocity&nbsp;varies&nbsp;linearly&nbsp;approximately.&nbsp;For&nbsp;all&nbsp;discharges&nbsp;in&nbsp;experiments,&nbsp;the&nbsp;streamwise,&nbsp;lateral&nbsp;and&nbsp;vertical&nbsp;turbulence&nbsp;intensities&nbsp;bear&nbsp;the&nbsp;similarity&nbsp;.&nbsp;They&nbsp;increase&nbsp;with&nbsp;flow&nbsp;depth&nbsp;increasing.&nbsp;After&nbsp;they&nbsp;reach&nbsp;the&nbsp;maximum&nbsp;values,&nbsp;they&nbsp;decrease&nbsp;as&nbsp;flow&nbsp;depth&nbsp;increase.&nbsp;In&nbsp;the&nbsp;meantime,&nbsp;the&nbsp;bed&nbsp;configuration&nbsp;is&nbsp;measured&nbsp;for&nbsp;four&nbsp;discharges,&nbsp;respectively.&nbsp;During&nbsp;the&nbsp;course&nbsp;of&nbsp;width&nbsp;adjustment,&nbsp;the&nbsp;main&nbsp;channel&nbsp;deposits&nbsp;and&nbsp;its&nbsp;side&nbsp;slope&nbsp;and&nbsp;flood&nbsp;plain&nbsp;erode&nbsp;when&nbsp;clean&nbsp;water&nbsp;is&nbsp;supplied.&nbsp;By&nbsp;the&nbsp;analysis&nbsp;of&nbsp;the&nbsp;bed&nbsp;in&nbsp;stabilization,&nbsp;i]]></description>
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