Turbulent solid???liquid slurry ??? ows in horizontal pipes are encountered in many engineering ??? elds, such as mining, chemical and petroleum. In many applications, turbulence is effective in keeping all the solids suspended, preventing particle accumulation. A two- ??? uid model for predicting the main features of fully-suspended slurry ??? ows, namely pressure gradient, solid???volume-fraction distribution, and velocity pro ??? le, is presented. The model is robust and numerically stable, and requires relatively low computer time to provide converged steady-state solutions. The novelty of the proposed model and its better performance compared to similar ones resides in the method of accounting for some key physical mechanisms governing these ??? ows, namely turbulent dispersion, interphase friction, and the mechanical contribution to friction. The performance of the model is checked by comparison with experimental data available in the literature over a wide range of operating conditions: pipe diameter between 50 and 150 mm; particle size between 90 and 520 ??m; mean delivered solid concentration up to 40% by volume; and slurry super???cial velocity between 1 and 7 m/s. The dispersed phase consists of either sand or spherical glass beads.

Numerical prediction of fully-suspended slurry flow in horizontal pipes

MESSA, GIANANDREA VITTORIO;MALAVASI, STEFANO
2014

Abstract

Turbulent solid???liquid slurry ??? ows in horizontal pipes are encountered in many engineering ??? elds, such as mining, chemical and petroleum. In many applications, turbulence is effective in keeping all the solids suspended, preventing particle accumulation. A two- ??? uid model for predicting the main features of fully-suspended slurry ??? ows, namely pressure gradient, solid???volume-fraction distribution, and velocity pro ??? le, is presented. The model is robust and numerically stable, and requires relatively low computer time to provide converged steady-state solutions. The novelty of the proposed model and its better performance compared to similar ones resides in the method of accounting for some key physical mechanisms governing these ??? ows, namely turbulent dispersion, interphase friction, and the mechanical contribution to friction. The performance of the model is checked by comparison with experimental data available in the literature over a wide range of operating conditions: pipe diameter between 50 and 150 mm; particle size between 90 and 520 ??m; mean delivered solid concentration up to 40% by volume; and slurry super???cial velocity between 1 and 7 m/s. The dispersed phase consists of either sand or spherical glass beads.
File in questo prodotto:
File Dimensione Formato  
MMM-2014-JPT.pdf

Accesso riservato

: Publisher’s version
Dimensione 1.34 MB
Formato Adobe PDF
1.34 MB Adobe PDF   Visualizza/Apri
Numerical prediction of fully-suspended slurry flow in horizontal pipes_11311-840525_Malvasi.pdf

accesso aperto

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 1.07 MB
Formato Adobe PDF
1.07 MB Adobe PDF Visualizza/Apri

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: http://hdl.handle.net/11311/840525
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 55
  • ???jsp.display-item.citation.isi??? 47
social impact