A priori analysis of an isothermal, turbulent two-phase flow

A. Pecenko, J.G.M. Kuerten

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

A novel approach to the simulation of isothermal, turbulent two-phase (liquid/vapour) flow of one substance is presented. The two-phase flow is modeled with a "one-fluid" formulation by means of a diffuse-interface concept and of the frame-invariant Korteweg tensor of capillary stresses at the interface. A single system of compressible Navier-Stokes equations can be written for the whole flow domain, the fluid properties being described by continuous functions of the mass density. The Van der Waals equation of state accounts for the variation of pressure with density at a given value of temperature slightly below the critical isotherm. After description of the numerical method, results of the Direct Numerical Simulation of a classic benchmark problem are shown. Next, two-phase subgrid terms related to the nonlinear pressure and capillary terms are studied by means of an a priori analysis based on DNS results, and a subgrid model for these terms is proposed.
Originele taal-2Engels
TitelQuality and reliability of large-eddy simulations II
RedacteurenM.V. Salvetti
Plaats van productieItaly, Pisa
UitgeverijSpringer
Pagina's111-120
ISBN van geprinte versie978-94-007-0231-8
DOI's
StatusGepubliceerd - 2011
Evenementconference; Quality and reliability of large-eddy simulations II, 9-11 sept. 2009 Pisa, Italy; 2009-09-09; 2009-09-11 -
Duur: 9 sep 200911 sep 2009

Publicatie series

NaamErcoftac Series
Volume16
ISSN van geprinte versie1382-4309

Congres

Congresconference; Quality and reliability of large-eddy simulations II, 9-11 sept. 2009 Pisa, Italy; 2009-09-09; 2009-09-11
Periode9/09/0911/09/09
AnderQuality and reliability of large-eddy simulations II, 9-11 sept. 2009 Pisa, Italy

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