Laminar plane fountains impinging on a ceiling with an opposing heat flux
Laminar plane fountains impinging on a ceiling with an opposing heat flux
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层流平面喷泉以相反的热通量撞击天花板
DOI:
10.1016/j.ijheatmasstransfer.2009.03.015
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发表时间:
2009-09
影响因子:
5.2
通讯作者:
S.W. Armfield
中科院分区:
文献类型:
--
作者:
N. Srinarayana;林文贤;S.W. Armfield
The behaviour of unsteady planar strong fountains, impinging on a ceiling with an opposing heat flux on the ceiling, is investigated numerically for 8.0⩽Fr⩽30.0 at Re=50 and Pr=7. The height of the ceiling is varied in 10⩽H/Xin⩽25, where Xinis the half-width of the fountain source, and the non-dimensional gradient of the temperature difference between the fountain source and the ceiling is varied for 0.2⩽Δθ/(H/Xin)⩽1.8. It is found that the fountain does not hit the ceiling, but instead stagnates and spreads at some distance from the ceiling due to the stratification of the fluids in the immediate vicinity of the ceiling. The scaling and direct numerical simulation results show that the augmented spreading distance Hd+Xdhas the scaling of Hd+Xd∼XinFr2/9(H/Xin)1/2[Δθ/(H/Xin)]-1/3in the range studied, where Hdis the maximum fountain height, Xdis the spreading distance measured at Hd, respectively.
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影响因子:
3.7
作者:
W. Baines;J. S. Turner;I. Campbell
通讯作者:
W. Baines;J. S. Turner;I. Campbell
DOI:
10.1017/s0022112099006953
发表时间:
2000-01
期刊:
J.Fluid Mech.
影响因子:
--
作者:
Wenxian Lin;S.W.Armfield
通讯作者:
S.W.Armfield
DOI:
10.1016/j.ijheatmasstransfer.2008.02.022
发表时间:
2008-09
影响因子:
5.2
作者:
G. D. McBain;N. Srinarayana;林文贤;S. W. Armfield
通讯作者:
S. W. Armfield
影响因子:
2.3
作者:
G. Abraham
通讯作者:
G. Abraham
影响因子:
3.7
作者:
Lynn J. Bloomfield;R. C. Kerr
通讯作者:
Lynn J. Bloomfield;R. C. Kerr