Paper 1: Volume 4 No.4 March 2006 Edition
Interacting
Turbulent Plumes in a Naturally Ventilated Enclosure
P.
F. Linden1
and N. B. Kaye2
1Department of Mechanical and Aerospace Engineering
,
University
of
California
,
San Diego
,
9500
Gilman Drive, La Jolla, CA 92093-0411, USA.
2Department of Civil and Environmental Engineering, Imperial College of
Science, Technology and Medicine, Imperial College Road, London, SW7 2BU,
UK
Abstract
The interaction of turbulent plumes is examined in the context of building
ventilation flows. Recent models for natural ventilation have been based
on simplified treatment of the heat sources in a ventilated enclosure.
These models treat buoyancy sources as plumes and assume that they do not
interact. To improve the applicability of these models to buildings we
examine the effects of plume-plume interaction on the ventilation flow. We
present experimental results for the flow in a ventilated enclosure where
two plumes in close proximity to each other coalesce to form a single
plume. We also examine the case of two plumes of opposing buoyancy flux
colliding in a ventilated enclosure. Theoretical models for the effect of
this interaction on the standard ventilation model of
Linden
, Lane-Serff and Smeed (1990) are also discussed.
Key
words: natural
ventilation, interacting plumes, buoyancy driven turbulence.
References
Baines WD and Turner JS: (1969) “Turbulent buoyant convection from a
source in a confined region”. J.
Fluid Mech., 37, pp51-80.
Cooper P and Linden PF: (1996) “Natural ventilation of an enclosure
containing two buoyancy sources”. J.
Fluid Mech., 311,
pp153-176.
Gladstone C and Woods AW: (2001) “On buoyancy-driven natural
ventilation of a room with a heated floor”. J. Fluid Mech., 441,
pp293-314.
Kaye
NB
and Linden PF: (2004)
“Coalescing axisymmetric turbulent plumes”. J.
Fluid Mech., 502,
pp41-63.
Kaye
NB
and Linden PF: (2006)
“Colliding turbulent plumes”. J.
Fluid Mech., 550,
pp85-109.
Kaye
NB
and Hunt GR: (2004) “Time
dependent flows in an emptying filling box”. J.
Fluid Mech., 520, pp135–156.
Linden PF and Cooper P: (1996) “Multiple sources of buoyancy in a
naturally ventilated enclosure”. J.
Fluid Mech., 311,
pp177-192.
Linden PF, Lane-Serff GF and Smeed DA: (1990) “Emptying filling boxes,
the fluid mechanics of natural ventilation”. J. Fluid Mech. 212,
pp309-315.
Hunt GR and Kaye NG: (2001) “Virtual origin correction for lazy
turbulent plumes”. J. Fluid Mech.,
435, pp377-396.
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