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Statements

Subject Item
n2:RIV%2F67985858%3A_____%2F10%3A00341764%21RIV11-GA0-67985858
rdf:type
n7:Vysledek skos:Concept
dcterms: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. 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.
dcterms:title
The Effect of Inlet Pulsations on the Backward-Facing Step Flow The Effect of Inlet Pulsations on the Backward-Facing Step Flow
skos:prefLabel
The Effect of Inlet Pulsations on the Backward-Facing Step Flow The Effect of Inlet Pulsations on the Backward-Facing Step Flow
skos:notation
RIV/67985858:_____/10:00341764!RIV11-GA0-67985858
n3:aktivita
n11:Z n11:P
n3:aktivity
P(GA101/04/0745), P(GA104/08/0428), Z(AV0Z40720504)
n3:cisloPeriodika
3
n3:dodaniDat
n5:2011
n3:domaciTvurceVysledku
n6:9220526 n6:2616920
n3:druhVysledku
n13:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n8:predkladatel
n3:idSjednocenehoVysledku
256027
n3:idVysledku
RIV/67985858:_____/10:00341764
n3:jazykVysledku
n17:eng
n3:klicovaSlova
flow separation and reattachment; backward-facing step; wall shear stress
n3:klicoveSlovo
n4:wall%20shear%20stress n4:flow%20separation%20and%20reattachment n4:backward-facing%20step
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[397AE5DDFB9B]
n3:nazevZdroje
European Journal of Mechanics B-Fluids
n3:obor
n18:CI
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
3
n3:projekt
n14:GA104%2F08%2F0428 n14:GA101%2F04%2F0745
n3:rokUplatneniVysledku
n5:2010
n3:svazekPeriodika
29
n3:tvurceVysledku
Pantzali, M. Pěnkavová, Věra Tihon, Jaroslav
n3:wos
000277554200006
n3:zamer
n12:AV0Z40720504
s:issn
0997-7546
s:numberOfPages
12