Paradox obrácení směru proudění účinkem ochranného stěnového proudu v trubici

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F06%3A00044395" target="_blank" >RIV/61388998:_____/06:00044395 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Paradox of flow reversal caused by protective wall jet in a pipe

Popis výsledku v původním jazyce

In some applications, fluid flow in a pipe is to be protected from contact with the wall by a co-flowing wall-jet. The basic core flow, assisted by the faster wall jet,may be expected to move faster. After all, the wall friction drag is eliminated and the transverse transport from the wall jet adds to its momentum. What actually happens is the very opposite: the central flow is slowed down and may be even found to reverse its direction so that it flows upstream, against its original direction as well asthat of the wall jet.This effect was found (Tesar, 1984) in radioactivity detectors. Early measurements led to a hypothesis about its origin, which was recently vindicated by numerical flowfield computations, performed to provide information for an analytical model based on control volume balance. The resultant control volume model is useful for designing devices using wall jet flows in a confined space.

Název v anglickém jazyce

Paradox of flow reversal caused by protective wall jet in a pipe

Popis výsledku anglicky

In some applications, fluid flow in a pipe is to be protected from contact with the wall by a co-flowing wall-jet. The basic core flow, assisted by the faster wall jet,may be expected to move faster. After all, the wall friction drag is eliminated and the transverse transport from the wall jet adds to its momentum. What actually happens is the very opposite: the central flow is slowed down and may be even found to reverse its direction so that it flows upstream, against its original direction as well asthat of the wall jet.This effect was found (Tesar, 1984) in radioactivity detectors. Early measurements led to a hypothesis about its origin, which was recently vindicated by numerical flowfield computations, performed to provide information for an analytical model based on control volume balance. The resultant control volume model is useful for designing devices using wall jet flows in a confined space.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

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Svazek periodika

128

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

141-154

Kód UT WoS článku

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EID výsledku v databázi Scopus

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