Simulation of Lagrangian dispersion using a Lagrangian stochastic model and DNS

热度202票 浏览161次 【共30条评论】【我要评论 时间:2008年8月01日 10:37
水利论文y3~3dz%`

Simulation of Lagrangian dispersion using a Lagrangian stochastic model and DNS in a turbulent channel flow

IX+K(}(b0O ue8N-N0

JZ5W7L9?Hu lZzs0【作者】LUO Jian-ping~1 QIU Xiang~2 LU Zhi-ming~2 LIU Yu-lu~(1; 2) (1.Shanghai Institute of Technology; Shanghai; 200235; 2.Shanghai Institute of Applied Mathematics and Mechanics; Shanghai University; Shanghai; 200072)水利论文4\4qH5Fb ST

水利论文 K%MJ;L]B2e.o~hM;h

水利论文e _ fn7p
【论文摘要】 <正>Dispersion of fluid particles in a turbulent channel flow is investigated using a modified Langevin equation,and is compared with DNS results at Reτ=100.A direct numerical simulation of turbulent channel flow at a low Reynolds number was performed to evaluate the velocities and trajectories of fluid particles;The pseudo-spectral numerical scheme was used in this study.The domain size in the streamwise,wall-normal,and spanwise directions is 1880×200×630 in wall units, respectively. Both...更多 the Lagrangian integral time scale directly obtained from DNS and the predicted value from the Eulerian integral time scale of DNS using the empirical relationship between the Eulerian and the Lagrangian integral time scales are used in the modified Langavin model to test the effect of integral scale on the dispersion.The results show that the slight variation of the Lagrangian integral time scale has little influence on the dispersion.The agreement between results of the model equation and those of DNS is satisfactory except the streamwise dispersion for intermediate times (20<t<300).This discrepancy might comes from the inherent characters of the model equation,i.e. the neglect of the effect of the cross-correlation.The incorporation of such effect in the Lagrangian stochastic model shall be addressed later.  还原水利论文_{z Xn

_^ x3aC%e x0【英文论文摘要】 Dispersion of fluid particles in a turbulent channel flow is investigated using a modified Langevin equation,and is compared with DNS results at Reτ=100.A direct numerical simulation of turbulent channel flow at a low Reynolds number was performed to evaluate the velocities and trajectories of fluid particles;The pseudo-spectral numerical scheme was used in this study.The domain size in the streamwise,wall-normal,and spanwise directions is 1880×200×630 in wall units, respectively. Both the Lagrangian integral time scale directly obtained from DNS and the predicted value from the Eulerian integral time scale of DNS using the empirical relationship between the Eulerian and the Lagrangian integral time scales are used in the modified Langavin model to test the effect of integral scale on the dispersion.The results show that the slight variation of the Lagrangian integral time scale has little influence on the dispersion.The agreement between results of the model equation and those of DNS...更多 is satisfactory except the streamwise dispersion for intermediate times (20<t<300).This discrepancy might comes from the inherent characters of the model equation,i.e. the neglect of the effect of the cross-correlation.The incorporation of such effect in the Lagrangian stochastic model shall be addressed later.  还原水利论文-M#iF;Mg![Q

水利论文 v cn QwTi

【英文论文关键词】 Turbulent Channel Flow; Langevin equation; DNS; Lagrangian dispersion
G.| U.gO @f`8ZrSX0【基金】the NSFC(No.10742005);; Shanghai Institude of Technology(No.YJ2007-26).
F*Xi6P(jl0

:C3XxAxm P\*^0

u ? q9\k0 

NUSDIg4aQj0
TAG: dispersion Simulation using model Lagrangian
顶:36 踩:24
【已经有142人表态】
23票
极差
10票
很差
11票
较差
19票
稍差
21票
稍好
18票
较好
18票
很好
22票
极好
下一篇:钝体势流绕流的有限元并行计算 (王吉飞; 万德成)
上一篇:浅水流动底坡项处理的通量数值修正法(于守兵)
水利论文Unknown网友 [nypd1doi] ip: 183.160.*.*
2015-11-12 13:37:34
-You can either take out a new mortgage, or sell other asse <a href="http://www.bengalsproshop.us.com/Womens-Vontaze-Burfict-Authentic-Jersey/">Womens Vontaze Burfict Jersey</a> ts to pay the mortgage off fully. But <a href="http://www.bengalsproshop.us.com/Devon-Still-Jersey/">Devon Still Jerseys</a>  optical signal is in a completely different domain.The challenge for the designers of the 2008 Aord was to deliver extra energy without promising the gasoline economic system, and within the new model t <a href="http://www.bengalsproshop.us.com/bengals-player-11-jersey/">Dane Sanzenbacher Jersey</a> h
水利论文安徽省电信网友 [nypd1doi] ip: 117.68.*.*
2016-02-26 04:03:41
Coh Jason Garrett said Saturday tryout players have pu <a href="http://www.sportingkansascityshop.com/Authentic-Jimmy-Medranda-Sporting-Kansas-City-Jersey/">Jimmy Medranda Sporting Kansas City Jersey</a> ed players off the 90-man r <a href="http://www.sportingkansascityshop.com/Authentic-Tim-Melia-Sporting-Kansas-City-Jersey/">Tim Melia Jersey</a> oster in the past."Ive worked my tail off to get to this point,Jimmy Medranda Sporting Kansas City Jersey," Williams said after the workout. Soy candles are common travel candles, as are these that incorporate essentia <a href="http://www.sportingkansascityshop.com/Authentic-Amadou-Dia-Sporting-Kansas-City-Jersey/">Amadou Dia Sporting Kansas City Jersey</a> l
水利论文Unknown网友 [k0ey9cko] ip: 183.160.*.*
2016-02-26 08:44:41
Featuring a sleek A-line  <a href="http://www.comprarsuperstar.es/adidas-zx-flux-baratas.html">adidas zx flux baratas</a> si <a href="http://www.comprarsuperstar.es/adidas-boost-baratas.html">adidas ultra boost comprar</a> lhouette,adidas zx flux baratas, this dress will look especially great on petite women, since it naturally elongates. In addition,adidas ultra boost comprar, they usually have a park area and  <a href="http://www.comprarsuperstar.es/adidas-boost-baratas/adidas-boost-hombre-baratas.html">adidas boost hombre baratas</a> a swimming pool for their patrons to enjoy. Certain variants can lead to baldness
水利论文Unknown网友 [nopd7roi] ip: 183.160.*.*
2016-04-05 20:40:44
Utilizing the public transport in almost any loca <a href="http://www.airmaxschweizoutlet-ch.com/gunstig-nike-air-max-thea-schweiz-bestellen.html">nike air max thea schwarz herren</a> tion, you can further reduce your business travel cost g <a href="http://www.airmaxschweizoutlet-ch.com/nike-air-max-90-damen.html">nike air max 90 damen reduziert</a> reatly.>>With regards to football news, the Saturday evening sports paper has anything a football fan requires. However, now there are several designs available and bag designing has become a bu <a href="http://www.airmaxschweizoutlet-ch.com/gunstig-nike-air-max-thea-schweiz-bestellen.html">nike air max thea mint kaufen</a> s
水利论文安徽省电信网友 [dlsr90xc] ip: 117.68.*.*
2016-05-26 12:58:59
There are lots of outstanding farnsfield auto centre that hire only petent trad <a href="http://www.teamflyershockeyshop.com/authentic-jaromir-jagr-flyers-jersey/">Jaromir Jagr Flyers Jersey</a> esn and you can now depend on their h <a href="http://www.teamflyershockeyshop.com/authentic-ron-hextall-flyers-jersey/">Ron Hextall Flyers Jersey</a> elps if you're looking for the oil change or even a vehicle repair. Satisfying because of the feasible ine you'll get when you earn from your wagers. But, many sportsbooks offer a way <a href="http://www.teamflyershockeyshop.com/authentic-brayden-schenn-flyers-jersey/">Brayden Schenn Flyers Jersey</a>
水利论文IANA网友 [lkad5fdb] ip: 223.240.*.*
2016-05-26 22:11:02
This graphic is generall <a href="http://www.baseballcubsstore.com/authentic-starlin-castro-cubs-jersey/">Chicago Cubs Starlin Castro Jersey</a> y used to ow  <a href="http://www.baseballcubsstore.com/authentic-fergie-jenkins-cubs-jersey/">Fergie Jenkins Jersey</a> happiness. The moment these factors get corrupted, the pc may perhaps experience a good deal of situations. Feel free to use the animated emoticons for Sati as often  <a href="http://www.baseballcubsstore.com/authentic-travis-wood-cubs-jersey/">Travis Wood Jersey</a> as you like, but try to avoid overuse. For the local businesses, the hCard锟?program is a cost-eff
水利论文Unknown网友 [icpc7q5c] ip: 183.160.*.*
2016-08-28 00:43:09
I call this victim-hood.''When guys can obtain every addit <a href="http://www.cheapnfljerseyssupplychina.us.com/">Cheap NFL Jerseys China</a> ional up and excited, it help <a href="http://www.cheapnfljerseyssupplychina.us.com/">Cheap Authentic Jerseys</a> s out alot.This gives them a place to remove old nail sheaths plus it lets them exercise and tone their muscles to stay strong.The schedule for2011 world cup will be held between February and the early April 2011 <a href="http://www.cheapnfljerseyssupplychina.us.com/">Cheap NFL Jerseys</a> .
水利论文安徽省电信网友 [nypd1doi] ip: 117.68.*.*
2016-09-18 20:37:29
Remember, car insurance finest toll ar <a href="http://www.footballfalconsofficial.com/falcons-justin-durant-black-jersey/">Authentic Justin Durant Jersey</a> e achievable. What you learn m <a href="http://www.footballfalconsofficial.com/falcons-dezmen-southward-black-jersey/">Dezmen Southward Falcons Jersey</a> ay help you overcome your hesitation to take action. Safari itself creates a picture of various animals and the African wildlife.comArticle Source: ?If you are in classes  <a href="http://www.footballfalconsofficial.com/falcons-paul-soliai-black-jersey/">Paul Soliai Falcons Jersey</a> that are only an hour long, I think it is better to do the wh
水利论文安徽省电信网友 [kse5ig0d] ip: 117.68.*.*
2016-12-20 05:36:56
Professionals are absolutely s <a href="http://www.achatsneakers2017.fr/nike-air-max-2017/nike-air-max-2017-noir.html">nike air max 2017 noir hommes</a> killed on t <a href="http://www.achatsneakers2017.fr/">nike air max 2017 france</a> heir business and realize the complexities of the task you are providing them. It also depends on the intensity of the problem being handled. If the chop derived from one of color completely to another,nike air max 2017 noir hommes <a href="http://www.achatsneakers2017.fr/nike-air-max-2017/nike-air-max-2017-homme.html">nike air max 2017 femme pas cher</a> , seemingly inside an unpred
水利论文安徽省合肥市电信网友 [dj2gyqgr4c] ip: 60.168.*.*
2017-02-05 22:18:26
Even so, in the event that you've specific motor ve <a href="http://www.scontishoxoutlet.it/nike-shox-r4/nike-shox-r4-nere.html">nike shox r4 nere</a> hicle knowledge as well as know about  <a href="http://www.scontishoxoutlet.it/nike-free-flyknit-chukka.html">nike free flyknit chukka italia</a> frequent traps of getting second hand vehicles, it will be possible to buy a wonderful car or truck.There keep on being many different hurdles in direction of acheiving an sk <a href="http://www.scontishoxoutlet.it/nike-shox-nz/nike-shox-nz-bianche.html">nike shox nz bianche</a> illed scholarship. The spacious lobby
水利论文安徽省电信网友 [nypd1doi] ip: 117.68.*.*
2017-03-28 23:22:31
65 million.After you enter agreements for content sharing, be sure that you <a href="http://www.roshe.ch/">?nike roshe run schweiz</a>  just <a href="http://www.roshe.ch/nike-roshe-one-rot.html">nike roshe run rot wei? damen</a>  are conscious of how the content material might be utilised and what your rights are because the author.Author's Resource BoxChris Smith is a dedicated dog owner and creator of "The Marlins havel <a href="http://www.roshe.ch/nike-roshe-one/nike-roshe-one-breeze.html">nike roshe run breeze wei?</a> ost pretty much all cred
水利论文安徽省电信网友 [kse23p4d] ip: 117.68.*.*
2017-07-11 06:15:26
Commence boning high o <a href="http://www.teamcowboysmall.com/Youth-Bob-Lilly-Elite-Jersey/">Bob Lilly Cowboys Jersey</a> n your cancer kno <a href="http://www.teamcowboysmall.com/Youth-James-Hanna-Elite-Jersey/">Elite James Hanna Jersey</a> wledge by reading through the ideas in this post.Change your bedroom into a getaway coming from all the sound and distractions in your living. Having been in the field for some t <a href="http://www.teamcowboysmall.com/Youth-Gavin-Escobar-Elite-Jersey/">Cheap Gavin Escobar Jersey</a> ime, they understand that there are varying requirements. Having your hands upon Jo
水利论文安徽省合肥市电信网友 [k0ey9cko] ip: 60.166.*.*
2017-07-28 03:47:42
Obtaining your essex weatherSherrie Niblock   Submitted 2014-02-0 <a href="http://www.mlbbrewersteamshop.com/authentic-wily-peralta-brewers-Jersey/">Wily Peralta Jersey</a> 1 13:17:18 You need a web site that can offer you immediate up <a href="http://www.mlbbrewersteamshop.com/">Milwaukee Brewers Alternate Jerseys</a> dates on your nearby weather. If there would be concerns, one might address these problems to any school authority or instructor so that they can be immediately done someth <a href="http://www.mlbbrewersteamshop.com/authentic-francisco-rodriguez-brewers-Jersey/">Milwaukee Brewers Francisco Rodriguez Jersey</a> i
水利论文IANA网友 [dlsf08ec] ip: 36.57.*.*
2017-09-10 04:09:23
No omissions whatsoever should be done during <a href="http://www.airhuarachetrainers-uk.com/nike-air-huarache-og.html">nike air huarache og colorways</a>  the instructions. Taking way too substantial of  <a href="http://www.airhuarachetrainers-uk.com/">nike air huarache uk sale</a> strides as part of your path to healing from depression could really grow the depression and result in more harm than good.Women who have small breasts often feel envious of other women  <a href="http://www.airhuarachetrainers-uk.com/nike-air-huarache-black.html">nike air huarache all black mens</a> because they have la
水利论文IANA网友 [dlsf08ec] ip: 36.57.*.*
2017-10-20 03:42:01
Review your vehi <a href="http://www.teamsteelersstore.com/c-59-steelers-alejandro-villanueva-jersey.aspx">Authentic Alejandro Villanueva Jersey</a> cles insurance coverage policy and check for errors.If ther <a href="http://www.teamsteelersstore.com/c-2-hoodie.aspx">Pittsburgh Steelers Hoodie</a> e are drivers that are listed on your policy who dont drive your car any longer, have them taken off as soon as attainable. Bringing down operating costs is the ultimate goal.A transmission service, for example, is one of th <a href="http://www.teamsteelersstore.com/c-12-steelers-jack-lambert-jersey.aspx">Jack Lambert Steelers Jersey</a> e
水利论文IANA网友 [kse5ig0d] ip: 36.57.*.*
2017-11-29 03:43:46
Other people may prefer using bikes for this job. Hav <a href="http://www.soccerborussiadortmundshop.com/Authentic-Nuri-Sahin-Jersey/">Nuri Sahin Dortmund Jersey</a> ing said that,Nuri  <a href="http://www.soccerborussiadortmundshop.com/Authentic-Raphael-Guerreiro-Jersey/">Raphael Guerreiro Dortmund Jersey</a> Sahin Dortmund Jersey, leaving any car detail wax in the cracks is going to reduce the appearance of your car in spite of how sparkling the actual paint might be. Vision should be encompass everything, you should work out  <a href="http://www.soccerborussiadortmundshop.com/Authentic-Marc-Bartra-Jersey/">Marc Bartra Dortmund Jersey</a> the go
水利论文IANA网友 [nypd1doi] ip: 36.57.*.*
2017-12-19 06:09:03
The scar could cause ac <a href="http://www.hockeykingsshoponline.com/authentic-rogie-vachon-kings-jersey-sale/">Rogie Vachon Jersey</a> ute and chronic disabilities particularly in are <a href="http://www.hockeykingsshoponline.com/authentic-rob-scuderi-kings-jersey-sale/">Rob Scuderi Authentic Jersey</a> as of the major joints such as the neck, knee,Rogie Vachon Jersey, ankle, elbow, and shoulder. This ensures that clothing made from this material can last for <a href="http://www.hockeykingsshoponline.com/authentic-trevor-lewis-kings-jersey-sale/">Trevor Lewis Women Jersey</a>  many years without developing any problems. Some managers micromanage
水利论文IANA网友 [dy1gyvgr3yfr] ip: 36.57.*.*
2017-12-19 14:28:13
Most of these firms dealing with su <a href="http://www.cheapwholesalenflnikejerseys.us.com/">Cheap Jerseys Wholesale</a> ch natural products have online presence..The selected  <a href="http://www.cheapwholesalenflnikejerseys.us.com/">Cheap Jerseys</a> players will form eight teams of STAIRS that include two girls teams in age groups under14 and under17 and four boys teams  two <a href="http://www.cheapwholesalenflnikejerseys.us.com/">Wholesale NFL Jerseys From China</a>  each for the same age groups. A lot of themes dont even hold up if you ad a subca
水利论文IANA网友 [nypd1doi] ip: 36.57.*.*
2018-01-08 20:32:46
So, it is be <a href="http://www.teamrealmadridsoccershop.com/Authentic-Raphael-Varane-Futbol-Jersey.html">Authentic Raphael Varane Jersey</a> st to try to eat as long as you happen to be famished as <a href="http://www.teamrealmadridsoccershop.com/Authentic-Daniel-Carvajal-Futbol-Jersey.html">Replica Daniel Carvajal Jersey</a>  a way to guard ones dental health. It is totally very important that your self be unbelievably informed of the choices with the most up to date of nowadays's scum ware.. Yo digo que ella no se movi? sino que e <a href="http://www.teamrealmadridsoccershop.com/Authentic-Ruben-Yanez-Futbol-Jersey.html">Replica Ruben Yanez Jersey</a> l que se movi? fue el
水利论文IANA网友 [kidc5b0a] ip: 36.57.*.*
2018-01-08 23:45:35
Individually you may have a g <a href="http://www.wholesalenflfootballjerseysshop.com/">Wholesale NFL Jerseys Cheap</a> o <a href="http://www.wholesalenflfootballjerseysshop.com/">Wholesale Jerseys For Cheap</a> od pair of shoes and something to maintain sweat off your eyes as it drips from your forehead Safety as it pertains to any sport  <a href="http://www.wholesalenflfootballjerseysshop.com/">Wholesale NFL Jerseys</a> or form of exercising involves a lot of common sense aspects With just a few bucks, you will have your pool looking new within a very short t
查看全部回复【已有30位网友发表了看法】

广告投放

广告投放