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EnglishThe 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.
| Titolo: | Mixed convection flow of a Bingham plastic in a vertical annular duct with a transverse temperature gradient |
| Autore/i: | BARLETTA, ANTONIO; ROSSI DI SCHIO, EUGENIA; ZANCHINI, ENZO |
| Autore/i Unibo: | |
| Anno: | 2005 |
| Titolo del libro: | Eurotherm Seminar 77: Heat and Mass Transfer in Food Processing (Parma, Italy, June 20-22, 2005). |
| Pagina iniziale: | 69 |
| Pagina finale: | 73 |
| 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. |
| Data prodotto definitivo in UGOV: | 23-set-2005 |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
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