Most models of sediment transport are based on the hypothesis of a weak interaction between the fluid and the sediment phase, where the main flow is subjected to the mass and momentum conservation of the fluid phase, with small corrections due to the presence of the sediments. These models usually give a correct answer for conditions where the concentration of sediment is really low. In the case of high sediment transport, some models analyze the two subdomains separately, the high and the low concentration, and employ different constitutive equations. In the present model there is a two-phase description of the whole domain. The closure of the turbulence and the interaction between the sediments and the fluid introduce approximations, but results are consistent with experiments and previous models.

Two-phase flow modeling of sediment motion in sheet-flows above plane beds / Longo, Sandro Giovanni. - In: JOURNAL OF HYDRAULIC ENGINEERING. - ISSN 0733-9429. - 131:5(2005), pp. 366-379. [10.1061/(ASCE)0733-9429(2005)131:5(366)]

Two-phase flow modeling of sediment motion in sheet-flows above plane beds

LONGO, Sandro Giovanni
2005-01-01

Abstract

Most models of sediment transport are based on the hypothesis of a weak interaction between the fluid and the sediment phase, where the main flow is subjected to the mass and momentum conservation of the fluid phase, with small corrections due to the presence of the sediments. These models usually give a correct answer for conditions where the concentration of sediment is really low. In the case of high sediment transport, some models analyze the two subdomains separately, the high and the low concentration, and employ different constitutive equations. In the present model there is a two-phase description of the whole domain. The closure of the turbulence and the interaction between the sediments and the fluid introduce approximations, but results are consistent with experiments and previous models.
2005
Two-phase flow modeling of sediment motion in sheet-flows above plane beds / Longo, Sandro Giovanni. - In: JOURNAL OF HYDRAULIC ENGINEERING. - ISSN 0733-9429. - 131:5(2005), pp. 366-379. [10.1061/(ASCE)0733-9429(2005)131:5(366)]
File in questo prodotto:
File Dimensione Formato  
7_Longo_JHE.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 200.12 kB
Formato Adobe PDF
200.12 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/1445430
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 45
  • ???jsp.display-item.citation.isi??? 43
social impact