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Primena modela razmene količine kretanja u analizi uticaja geometrije i hidrauličkih otpora na osnovne odlike tečenja u koritu za veliku vodu

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

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2015
Rad se nalazi na intenet stranic časopisa Vodoprivreda http://www.vodoprivreda.net/wp-content/uploads/2016/05/11-Ivan-Stojnic-i-saradnici.pdf (516.6Kb)
Authors
Stojnić, Ivan
Muhić, Filip
Đorđević, Dejana
Article (Published version)
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Abstract
U 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.
A 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 th...e momentum exchange contribution with the flow depth depends only on the floodplain roughness.

Keywords:
korito za veliku vodu / compound channel / razmena količine kretanja / momentum exchange / „gubitak” mehaničke energije toka/ energy “loss” / širina i rapavost plavne površine / odnos dubine i širine glavnog korita / floodplain width and roughness / main channel aspect ratio
Source:
Vodoprivreda, 2015, 47, 276-278, 261-268
Publisher:
  • Srpsko društvo za odvodnjavanje i navodnjavanje
Projects:
  • Monitoring and Modeling of Rivers and Reservoirs (MORE) - Physical, Chemical, Biological and Morphodynamic Parameters (RS-37009)
  • Urban Drainage Systems as Key Infrastructure in Cities and Towns (RS-37010)

ISBN: 0350-0519

[ Google Scholar ]
URI
http://grafar.grf.bg.ac.rs/handle/123456789/1990
Collections
  • Radovi istraživača / Researcher's publications
Institution
GraFar
TY  - JOUR
AU  - Stojnić, Ivan
AU  - Muhić, Filip
AU  - Đorđević, Dejana
PY  - 2015
UR  - http://grafar.grf.bg.ac.rs/handle/123456789/1990
AB  - U 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.
AB  - A   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.
PB  - Srpsko društvo za odvodnjavanje i navodnjavanje
T2  - Vodoprivreda
T1  - Primena modela razmene količine kretanja u analizi uticaja geometrije i hidrauličkih otpora na osnovne odlike tečenja u koritu za veliku vodu
T1  - Study of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge method
EP  - 268
IS  - 276-278
SP  - 261
VL  - 47
ER  - 
@article{
author = "Stojnić, Ivan and Muhić, Filip and Đorđević, Dejana",
year = "2015",
url = "http://grafar.grf.bg.ac.rs/handle/123456789/1990",
abstract = "U 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., A   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.",
publisher = "Srpsko društvo za odvodnjavanje i navodnjavanje",
journal = "Vodoprivreda",
title = "Primena modela razmene količine kretanja u analizi uticaja geometrije i hidrauličkih otpora na osnovne odlike tečenja u koritu za veliku vodu, Study of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge method",
pages = "268-261",
number = "276-278",
volume = "47"
}
Stojnić I, Muhić F, Đorđević D. Study of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge method. Vodoprivreda. 2015;47(276-278):261-268
Stojnić, I., Muhić, F.,& Đorđević, D. (2015). Study of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge method.
VodoprivredaSrpsko društvo za odvodnjavanje i navodnjavanje., 47(276-278), 261-268.
Stojnić Ivan, Muhić Filip, Đorđević Dejana, "Study of the influence of channel geometry and hydraulic resistance on flow characteristics in compound channels with the exchange discharge method" 47, no. 276-278 (2015):261-268

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