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Study of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge method

dc.creatorStojnić, Ivan
dc.creatorMuhić, Filip
dc.creatorĐorđević, Dejana
dc.date.accessioned2020-06-29T12:26:14Z
dc.date.available2020-06-29T12:26:14Z
dc.date.issued2015
dc.identifier.isbn0350-0519
dc.identifier.urihttp://grafar.grf.bg.ac.rs/handle/123456789/1990
dc.description.abstractU radu je sproveden niz numeričkih ogleda sa ciljem da se utvrdi kako geometrija korita za veliku vodu (KVV) i rapavost plavnih površina utiču na razmenu količine kretanja (RKK) između glavnog korita i plavnih površina i njen udeo u ukupnom „gubitku” mehaničke energije toka. U tu svrhu korišćen je model linijskog ustaljenog tečenja u KVV vodu koji je zasnovan na RKK između glavnog korita i plavnih površina. Ispitivanje je pokazalo da se na plavnim površinama, zbog ujednačavanja hidrauličkih uslova u poprečnom preseku KVV, udeo RKK u ukupnom „gubitku” energije smanjuje sa povećanjem dubine nezavisno od geometrije korita i rapavosti plavnih površina i da razmena i njen udeo postaju veći u sledećim slučajevima: 1) kada je glavno korito dublje, 2) kada se isključi jedna plavna površina, i 3) kada se poveća rapavost plavnih površina. Promena udela RKK sa povećanjem dubine toka u glavnom koritu zavisi samo od rapavosti plavnih površina.sr
dc.description.abstractA series of numerical experiments is conducted to determine how compound channel geometry and floodplain roughness affect both a momentum transfer between main channel and floodplains and its contribution to the total energy “loss”. To this aim, a 1D, exchange discharge model, which accounts for the momentum exchange between the main channel and floodplains, is used. It is found that the contribution of the momentum exchange to the total energy “loss” reduces on floodplains with the flow depth regardless of the compound channel geometry and floodplain roughness and that both, the momentum exchange and its contribution to the total energy “loss”, are increased in the following cases: 1) when the main channel aspect ratio decreases, 2) when compound channel is asymmetrical and 3) when the roughness of the floodplain increases. In the main channel, the variation in the momentum exchange contribution with the flow depth depends only on the floodplain roughness.en
dc.language.isosrsr
dc.publisherSrpsko društvo za odvodnjavanje i navodnjavanjesr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37009/RS//sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37010/RS//sr
dc.rightsopenAccesssr
dc.sourceVodoprivredasr
dc.subjectkorito za veliku vodu / compound channelsr
dc.subjectrazmena količine kretanja / momentum exchangesr
dc.subject„gubitak” mehaničke energije toka/ energy “loss”sr
dc.subjectširina i rapavost plavne površinesr
dc.subjectodnos dubine i širine glavnog koritasr
dc.subjectfloodplain width and roughnesssr
dc.subjectmain channel aspect ratiosr
dc.titlePrimena modela razmene količine kretanja u analizi uticaja geometrije i hidrauličkih otpora na osnovne odlike tečenja u koritu za veliku vodusr
dc.titleStudy of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge methoden
dc.typearticlesr
dc.rights.licenseARRsr
dc.citation.epage268
dc.citation.issue276-278
dc.citation.spage261
dc.citation.volume47
dc.identifier.fulltexthttp://grafar.grf.bg.ac.rs/bitstream/id/7705/11-Ivan-Stojnic-i-saradnici-Vodoprivreda.pdf
dc.type.versionpublishedVersionsr


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