Pregled bibliografske jedinice broj: 275067
Efficient Implementation of ENO Scheme in Water Hammer Wave Modelling
Efficient Implementation of ENO Scheme in Water Hammer Wave Modelling // Extended Abstracts and Proceedings of the 5th International Congress of the Croatian Society of Mechanics (CD) / Matejiček, Franjo (ur.).
Zagreb: Hrvatsko društvo za mehaniku (HDM), 2006. str. 155-156 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Efficient Implementation of ENO Scheme in Water Hammer Wave Modelling
Autori
Škifić, Jerko ; Črnjarić-Žic, Nelida ; Crnković, Bojan
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Extended Abstracts and Proceedings of the 5th International Congress of the Croatian Society of Mechanics (CD)
/ Matejiček, Franjo - Zagreb : Hrvatsko društvo za mehaniku (HDM), 2006, 155-156
ISBN
953-96243-5-5
Skup
International Congress of Croatian Society of Mechanics (5 ; 2006)
Mjesto i datum
Trogir, Hrvatska; Split, Hrvatska, 21.09.2006. - 23.09.2006
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
water hammer; wave modelling; ENO scheme; hyperbolic conservation laws
Sažetak
Hydraulic transients can cause high pressures, which can be dangerous for the piping systems, especially in hydroelectric powerplants. During the simulation of transient pipe flow, friction losses are often estimated by using steady or quasi-steady friction terms. The velocity profiles in rapid transients significantly differ from the "steady" profiles in slowly varying transients. Since hydraulic transients can be described by the hyperbolic conservation laws and since the source term can-not be exactly evaluated due to increasingly more complicated expressions, it would be desirable to apply numerical schemes that are high order accurate. The numerical schemes satisfying the stated requirements are finite volume ENO schemes, which are used in this paper. Implementation of finite volume ENO scheme to the hydraulic transients modeling was proven to be justified. Applied one dimensional assumptions fail to capture the full three dimensional nature of the resulting damped oscillatory flow. Unsteady friction is the primary manifestation of this effect. However, conducted numerical simulations have shown to be in a good agreement with measured data. It is also worth noting that coarse grids give adequately good results compared to denser grid. Moreover, cfl number variation shows that finite volume ENO scheme produces very little numerical diffusion.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo
