A self-contained treatment of laminar duct-flow heat transfer is performed. The presentation includes all the necessary definitions and results which are required for the treatment of the thermal entrance problem in a duct with an arbitrary cross section. The special cases of a plane-parallel channel and of a circular duct are discussed in detail. A comparison is made between the results obtained when viscous dissipation is taken into account and those which are obtained when this effect is neglected. The treatment of the effect of viscous dissipation presented here differs from previous approaches available in the literature. The difference relies mainly in the prescription of the initial condition at the entrance cross-section. Unlike in similar treatments available in the literature, the effect of viscous dissipation is taken into account self-consistently, i.e. both upstream and downstream of the entrance section.

A. Barletta, E. Magyari, B. Keller (2005). Effect of viscous dissipation on thermally developing forced convection duct flows (Research Report 13/2005). ZURICH : ETH - Chair of Physics of Buildings.

Effect of viscous dissipation on thermally developing forced convection duct flows (Research Report 13/2005)

BARLETTA, ANTONIO;
2005

Abstract

A self-contained treatment of laminar duct-flow heat transfer is performed. The presentation includes all the necessary definitions and results which are required for the treatment of the thermal entrance problem in a duct with an arbitrary cross section. The special cases of a plane-parallel channel and of a circular duct are discussed in detail. A comparison is made between the results obtained when viscous dissipation is taken into account and those which are obtained when this effect is neglected. The treatment of the effect of viscous dissipation presented here differs from previous approaches available in the literature. The difference relies mainly in the prescription of the initial condition at the entrance cross-section. Unlike in similar treatments available in the literature, the effect of viscous dissipation is taken into account self-consistently, i.e. both upstream and downstream of the entrance section.
2005
57
A. Barletta, E. Magyari, B. Keller (2005). Effect of viscous dissipation on thermally developing forced convection duct flows (Research Report 13/2005). ZURICH : ETH - Chair of Physics of Buildings.
A. Barletta; E. Magyari; B. Keller
File in questo prodotto:
Eventuali allegati, non sono esposti

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: https://hdl.handle.net/11585/5994
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact