The aim of this paper is to investigate the mixed convection and flow reversal in a vertical concentric annular duct, with reference to laminar and fully developed flow of a Bingham plastic. The boundary walls are supposed to be isothermal, with different temperatures. The dimensionless mass, momentum and energy balance equations are written together with the viscous stress constitutive equation for a Bingham plastic and then solved analytically. The dimensionless velocity, temperature and viscous stress fields, as well as the dimensionless pressure drop parameter, are obtained. The limiting cases of forced convection and of Newtonian fluid are considered.

Mixed convection flow of a Bingham plastic in a vertical annular duct with a transverse temperature gradient

BARLETTA, ANTONIO;ROSSI DI SCHIO, EUGENIA;ZANCHINI, ENZO
2005

Abstract

The aim of this paper is to investigate the mixed convection and flow reversal in a vertical concentric annular duct, with reference to laminar and fully developed flow of a Bingham plastic. The boundary walls are supposed to be isothermal, with different temperatures. The dimensionless mass, momentum and energy balance equations are written together with the viscous stress constitutive equation for a Bingham plastic and then solved analytically. The dimensionless velocity, temperature and viscous stress fields, as well as the dimensionless pressure drop parameter, are obtained. The limiting cases of forced convection and of Newtonian fluid are considered.
Eurotherm Seminar 77: Heat and Mass Transfer in Food Processing (Parma, Italy, June 20-22, 2005).
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A. Barletta; E. Rossi di Schio; E. Zanchini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/5958
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