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@ARTICLE{Meunders:844682,
author = {Meunders, Andreas and Arnold, Lukas and Belt, Alexander and
Hundhausen, Alexander},
title = {{V}elocity measurements of a bench scale buoyant plume
applying particle image velocimetry},
journal = {International journal of heat and mass transfer},
volume = {123},
issn = {0017-9310},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-02067},
pages = {473 - 488},
year = {2018},
abstract = {This paper presents the experimental investigation of the
buoyant plume above an electrically heated block of copper.
The velocity field in a vertical plane along the plume axis
is investigated via particle image velocimetry. Experiments
with electrical power from 30 W to 96 W are carried
out, which lead to heat source temperatures of 149–307
°C. The resulting flow is laminar for the lowest power
setting and undergoes a transition to turbulent flow for
higher heat inputs. With increasing heat input the point of
transition from laminar to turbulent flow occurs at lower
heights.Time-averaged velocity fields are presented together
with the according measurement uncertainty that results from
the evaluation with particle image velocimetry. Based on
these velocity fields a number of characteristic values for
the plume is derived in different heights, e.g. maximum
velocities, plume widths and flow integrals. In order to
further evaluate the transition from laminar to turbulent
flow the vertical velocity and the standard deviation of the
horizontal velocity along the plume axis and as a function
of the Grashof number are investigated. The transition
occurs at Grashof numbers in the range $4×10^8$ < Gr <
$2×10^9,$ which is in accordance with previous findings. In
addition to the velocity measurements, the temperature
stratification inside the enclosure is measured to quantify
the ambient conditions.},
cin = {IAS-7 / JSC / IEK-6},
ddc = {620},
cid = {I:(DE-Juel1)IAS-7-20180321 / I:(DE-Juel1)JSC-20090406 /
I:(DE-Juel1)IEK-6-20101013},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511)},
pid = {G:(DE-HGF)POF3-511},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000434887000040},
doi = {10.1016/j.ijheatmasstransfer.2018.02.011},
url = {https://juser.fz-juelich.de/record/844682},
}