Buoyancy-induced circulations in a 2D cavity containing rectangular heat source, are predicted numerically. The effect of thermal conditions at the boundaries of cavity is of specific concern. The vertical enclosure walls are in fact isothermal, but different combinations of boundary conditions are admitted at the horizontal walls. These are: isothermal top and bottom walls; top wall isothermal and bottom wall adiabatic; both walls adiabatic. The internal source is isothermal, and air is the working fluid. Results for the three situations are compared for values of the Grashof number, Gr, ranging from 4 x 104 to 4 x 106. The results encompass the stability limit for laminar flow, since a steady-state condition is not obtained at the highest Gr values. It is shown that different thermal boundary conditions give rise to quite different thermal-flow configurations, different heat transfer performances, and, in the high-Gr range, distinctive frequencies of oscillation of the system.

Effect of Thermal Boundary Conditions in the Numerical Prediction of Buoyant Flows in a Cavity Containing an Internal Heat Source / Barozzi, Giovanni Sebastiano; Corticelli, Mauro Alessandro. - STAMPA. - I:(2000), pp. 297-308. (Intervento presentato al convegno XVIII Congresso Nazionale sulla trasmissione del calore tenutosi a Cernobbio (CO) nel 28-30 giugno 2000).

Effect of Thermal Boundary Conditions in the Numerical Prediction of Buoyant Flows in a Cavity Containing an Internal Heat Source

BAROZZI, Giovanni Sebastiano;CORTICELLI, Mauro Alessandro
2000

Abstract

Buoyancy-induced circulations in a 2D cavity containing rectangular heat source, are predicted numerically. The effect of thermal conditions at the boundaries of cavity is of specific concern. The vertical enclosure walls are in fact isothermal, but different combinations of boundary conditions are admitted at the horizontal walls. These are: isothermal top and bottom walls; top wall isothermal and bottom wall adiabatic; both walls adiabatic. The internal source is isothermal, and air is the working fluid. Results for the three situations are compared for values of the Grashof number, Gr, ranging from 4 x 104 to 4 x 106. The results encompass the stability limit for laminar flow, since a steady-state condition is not obtained at the highest Gr values. It is shown that different thermal boundary conditions give rise to quite different thermal-flow configurations, different heat transfer performances, and, in the high-Gr range, distinctive frequencies of oscillation of the system.
2000
XVIII Congresso Nazionale sulla trasmissione del calore
Cernobbio (CO)
28-30 giugno 2000
I
297
308
Barozzi, Giovanni Sebastiano; Corticelli, Mauro Alessandro
Effect of Thermal Boundary Conditions in the Numerical Prediction of Buoyant Flows in a Cavity Containing an Internal Heat Source / Barozzi, Giovanni Sebastiano; Corticelli, Mauro Alessandro. - STAMPA. - I:(2000), pp. 297-308. (Intervento presentato al convegno XVIII Congresso Nazionale sulla trasmissione del calore tenutosi a Cernobbio (CO) nel 28-30 giugno 2000).
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/13838
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact