The Effect of Inlet Pulsations on the Backward-Facing Step Flow

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F10%3A00341764" target="_blank" >RIV/67985858:_____/10:00341764 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The Effect of Inlet Pulsations on the Backward-Facing Step Flow

Original language description

This experimental study of backward-facing step flow is focused on the transient flow regime (Reh is ranging from 30 to 1800). An unsteady flow pattern with several regions of flow separation downstream the step is investigated in a water channel with the most common expansion geometry (ER=2). The electrodiffusion technique of wall shear rate measurements is applied to recognize the flow structure behind the step. The sliding step configuration enables sufficient mapping of the near-wall flow region even if only two direction-sensitive probes are flush-mounted into the downstream channel walls. The wall shear rate profiles (at bottom and roof) are obtained under steady and pulsatile (frequency up to 3 Hz) flow conditions at the inlet. The inlet flow pulsations affect strongly the overall flow structure behind the step. Up to 80% reduction of the reattachment length is achieved by applying flow pulsations at the most effective frequency.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2010

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

European Journal of Mechanics B-Fluids

ISSN

0997-7546

e-ISSN

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Volume of the periodical

29

Issue of the periodical within the volume

3

Country of publishing house

FR - FRANCE

Number of pages

12

Pages from-to

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UT code for WoS article

000277554200006

EID of the result in the Scopus database

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