Pregled bibliografske jedinice broj: 275410
Improved implicit numerical scheme for one-dimensional open channel flow equations
Improved implicit numerical scheme for one-dimensional open channel flow equations // Proceedings of the 5th International Congress of Croatian Society of Mechanics / Matajiček, Franjo (ur.).
Zagreb: Hrvatsko društvo za mehaniku (HDM), 2006. (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 275410 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Improved implicit numerical scheme for one-dimensional open channel flow equations
Autori
Kranjčević, Lado ; Crnković, Bojan ; Črnjaric-Žic Nelida
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Proceedings of the 5th International Congress of Croatian Society of Mechanics
/ Matajiček, Franjo - Zagreb : Hrvatsko društvo za mehaniku (HDM), 2006
Skup
5th International Congress of Croatian Society of Mechanics
Mjesto i datum
Trogir, Hrvatska, 21.09.2006. - 23.09.2006
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
open channel flow; implicit numerical scheme; balance laws; source term decomposi-tion; channel with irregular geometry
Sažetak
Implicit numerical approach proved to be very suitable for solving open channel flow equations especially on large scale domains because of its ability to employ larger time steps and therefore considerably reduce overall computing time. Numerical modelling of open channel flow equations simulating real problems involving irregular channels with variable width introduces the flux space dependency problem that has not been resolved so far in implicit numerical approach. Original finite difference Linearized Conservative Scheme is presented and modifications of flux and source terms are introduced. Numerical flux formulation needed modification in order to account for the spatially variable flux dependency, and consequently the source term is appropriately decomposed. Previous papers analyzed numerically balanced approximations of flux and source terms exclusively in explicit numerical schemes solving open channel flow equations. This paper introduces modifications of numerical approximations of flux and source term thus enabling the use of implicit numerical schemes in open channel flow problems simulations involving channels with nonprismatic geometry. Achieved improvements are presented through several test problems.
Izvorni jezik
Engleski
Znanstvena područja
Temeljne tehničke znanosti
