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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F02%3A02076812%21RIV%2F2003%2FGA0%2F212203%2FN
rdf:type
skos:Concept n19:Vysledek
dcterms:description
Heat and mass transfer from gas to wall is limited by a thin stagnant layer held on the surface by viscisity across which the transport takes place by much less efficient conductive mechanism. Authors achieved increasing the heat and mass transfer destroying the layer by an impinging jet modulated by an electrically driven loudspeaker. The required power depends on a flow regime, the minimum power required occurs in a bistable annular jet sensitised by to its undergoing a transition between different flow topologies. 5 different topological configurations OF the flow were found in the experiments - hot wire anemometric traverses- supported by numerical CFD solutions. Utilising the optimal regime more than 3-times increase in fluctuating velocity nearthe wall due to the excitation was obtained, which involves also an increase in turbulent convection. Heat and mass transfer from gas to wall is limited by a thin stagnant layer held on the surface by viscisity across which the transport takes place by much less efficient conductive mechanism. Authors achieved increasing the heat and mass transfer destroying the layer by an impinging jet modulated by an electrically driven loudspeaker. The required power depends on a flow regime, the minimum power required occurs in a bistable annular jet sensitised by to its undergoing a transition between different flow topologies. 5 different topological configurations OF the flow were found in the experiments - hot wire anemometric traverses- supported by numerical CFD solutions. Utilising the optimal regime more than 3-times increase in fluctuating velocity nearthe wall due to the excitation was obtained, which involves also an increase in turbulent convection.
dcterms:title
Increasing Transport Coefficients of Convective Processes by Flow Modification Increasing Transport Coefficients of Convective Processes by Flow Modification
skos:prefLabel
Increasing Transport Coefficients of Convective Processes by Flow Modification Increasing Transport Coefficients of Convective Processes by Flow Modification
skos:notation
RIV/68407700:21220/02:02076812!RIV/2003/GA0/212203/N
n3:strany
668;669
n3:aktivita
n15:P
n3:aktivity
P(GA101/99/0059), P(GA101/99/0060)
n3:dodaniDat
n21:2003
n3:domaciTvurceVysledku
n5:5522331
n3:druhVysledku
n20:D
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
648695
n3:idVysledku
RIV/68407700:21220/02:02076812
n3:jazykVysledku
n18:eng
n3:klicovaSlova
acoustic excitation; annular impinging flow; hot wire anemometry; turbulence
n3:klicoveSlovo
n9:turbulence n9:acoustic%20excitation n9:hot%20wire%20anemometry n9:annular%20impinging%20flow
n3:kontrolniKodProRIV
[344821CA528B]
n3:mistoKonaniAkce
Praha
n3:mistoVydani
Praha
n3:nazevZdroje
Proceedings of Workshop 2002
n3:obor
n16:BK
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n4:GA101%2F99%2F0059 n4:GA101%2F99%2F0060
n3:rokUplatneniVysledku
n21:2002
n3:tvurceVysledku
Tesař, Václav
n3:typAkce
n7:EUR
n3:zahajeniAkce
2002-02-11+01:00
s:numberOfPages
2
n8:hasPublisher
České vysoké učení technické v Praze
n17:isbn
80-01-02511-X
n11:organizacniJednotka
21220