Transient laminar natural convection heat transfer over an isothermal sphere: flow separation and associated wake vortex

George Gogos, Shu Yang

Research output: Contribution to conferencePaper

Abstract

Transient laminar natural convection over an isothermal sphere has been studied numerically for high Grashof numbers(105 ≤ Gr ≤ 109) and a wide range of Prandtl numbers (Pr = 0.02Γ0.7Γ7Γ and 100). A plume with a mushroom-shaped cap forms above the sphere. The thickness of both the transient cap and the steady plume stem decreases with increasing Gr or Pr. Flow separation and an associated recirculation vortex may appear in the wake of the sphere depending on the magnitude of Grashof and Prandtl numbers. Overall heat transfer and drag coefficients are also obtained.

Original languageEnglish (US)
Pages9
Number of pages1
StatePublished - Jan 1 1997
EventProceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24) - Vancouver, Can
Duration: Jun 22 1997Jun 26 1997

Other

OtherProceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24)
CityVancouver, Can
Period6/22/976/26/97

Fingerprint

Flow separation
Natural convection
Grashof number
Vortex flow
Prandtl number
Heat transfer
Drag coefficient
Heat transfer coefficients

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Gogos, G., & Yang, S. (1997). Transient laminar natural convection heat transfer over an isothermal sphere: flow separation and associated wake vortex. 9. Paper presented at Proceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24), Vancouver, Can, .

Transient laminar natural convection heat transfer over an isothermal sphere : flow separation and associated wake vortex. / Gogos, George; Yang, Shu.

1997. 9 Paper presented at Proceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24), Vancouver, Can, .

Research output: Contribution to conferencePaper

Gogos, G & Yang, S 1997, 'Transient laminar natural convection heat transfer over an isothermal sphere: flow separation and associated wake vortex', Paper presented at Proceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24), Vancouver, Can, 6/22/97 - 6/26/97 pp. 9.
Gogos G, Yang S. Transient laminar natural convection heat transfer over an isothermal sphere: flow separation and associated wake vortex. 1997. Paper presented at Proceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24), Vancouver, Can, .
Gogos, George ; Yang, Shu. / Transient laminar natural convection heat transfer over an isothermal sphere : flow separation and associated wake vortex. Paper presented at Proceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 24 (of 24), Vancouver, Can, .1 p.
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