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PIV MEASUREMENTS OF TURBULENT FLOW IN A CHANNEL WITH SOLID OR PERFORATED RIBS

Wang, Lei LU ; Salewski, Mirko LU and Sundén, Bengt LU (2010) Proceedings of 3rd Joint US-European Fluids Engineering Summer Meeting and 8th International Conference on Nanochannels, Microchannels, and Minichannels
Abstract
Particle image velocimetry measurements are performed in

a channel with periodic ribs on one wall. We investigate the flow

around two different rib configurations: solid and perforated ribs

with a slit. The ribs obstruct the channel by 20% of its height

and are arranged 10 rib heights apart. For the perforated ribs,

the slit height is 20% of the rib height, and the open-area ratio

is 16%. We discuss the flow in terms of mean velocity, streamlines,

vorticity, turbulence intensity, and Reynolds shear stress.

We find that the recirculation bubbles after the perforated ribs

are significantly smaller than those after the solid ribs. The reattachment

length... (More)
Particle image velocimetry measurements are performed in

a channel with periodic ribs on one wall. We investigate the flow

around two different rib configurations: solid and perforated ribs

with a slit. The ribs obstruct the channel by 20% of its height

and are arranged 10 rib heights apart. For the perforated ribs,

the slit height is 20% of the rib height, and the open-area ratio

is 16%. We discuss the flow in terms of mean velocity, streamlines,

vorticity, turbulence intensity, and Reynolds shear stress.

We find that the recirculation bubbles after the perforated ribs

are significantly smaller than those after the solid ribs. The reattachment

length after perforated ribs is smaller by about 45%

compared with the solid ribs. In addition, the Reynolds shear

stresses around the perforated ribs are significantly smaller than

in the solid rib case, leading to a reduction of the pressure loss

in the perforated rib case. (Less)
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Contribution to conference
publication status
published
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conference name
Proceedings of 3rd Joint US-European Fluids Engineering Summer Meeting and 8th International Conference on Nanochannels, Microchannels, and Minichannels
external identifiers
  • Scopus:80054979578
language
English
LU publication?
yes
id
f44a648d-cf1e-4032-b600-cfc792f95e16 (old id 1604083)
date added to LUP
2010-05-28 11:39:50
date last changed
2017-01-01 08:13:09
@misc{f44a648d-cf1e-4032-b600-cfc792f95e16,
  abstract     = {Particle image velocimetry measurements are performed in<br/><br>
a channel with periodic ribs on one wall. We investigate the flow<br/><br>
around two different rib configurations: solid and perforated ribs<br/><br>
with a slit. The ribs obstruct the channel by 20% of its height<br/><br>
and are arranged 10 rib heights apart. For the perforated ribs,<br/><br>
the slit height is 20% of the rib height, and the open-area ratio<br/><br>
is 16%. We discuss the flow in terms of mean velocity, streamlines,<br/><br>
vorticity, turbulence intensity, and Reynolds shear stress.<br/><br>
We find that the recirculation bubbles after the perforated ribs<br/><br>
are significantly smaller than those after the solid ribs. The reattachment<br/><br>
length after perforated ribs is smaller by about 45%<br/><br>
compared with the solid ribs. In addition, the Reynolds shear<br/><br>
stresses around the perforated ribs are significantly smaller than<br/><br>
in the solid rib case, leading to a reduction of the pressure loss<br/><br>
in the perforated rib case.},
  author       = {Wang, Lei and Salewski, Mirko and Sundén, Bengt},
  language     = {eng},
  title        = {PIV MEASUREMENTS OF TURBULENT FLOW IN A CHANNEL WITH SOLID OR PERFORATED RIBS},
  year         = {2010},
}