Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

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

In English

Författare

Summary, in English

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.

Publiceringsår

2010

Språk

Engelska

Dokumenttyp

Konferensbidrag

Ämne

  • Energy Engineering

Conference name

Proceedings of 3rd Joint US-European Fluids Engineering Summer Meeting and 8th International Conference on Nanochannels, Microchannels, and Minichannels

Conference date

2010-07-01 - 2010-08-05

Conference place

Montreal, Quebec, Canada

Status

Published