Proudění ve žlabu při okrajových podmínkách rozdílné drsnosti: stanovení tečného napětí pomocí sondy ADV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F08%3A01150208" target="_blank" >RIV/68407700:21110/08:01150208 - 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

Flume Flows Between Boundaries of Very Different Roughness: Evaluation of Friction Using ADV Measurements

Popis výsledku v původním jazyce

Two ADV probes were used for the measurements of the local velocities and turbulent characteristics in boundary layers of flume flows in order to determine friction conditions at the flow boundaries. Three configurations of the top of the flow were tested and mutually compared: the flow with free water surface, the flow with water surface covered by a smooth solid plate and the flow with water surface covered by a very rough solid plate. The tests carried out for various installed flow rates and water depths showed that a presence of a solid plate at the top of the flow significantly affected the velocity profile and turbulent characteristics in the flow. Hence the presence of the water-surface cover considerably increased the shear velocity at the bottom of the flow. The paper comments on the test results and quantifies the effects of the velocity-profile deformation to the friction conditions at the bottom of the flow.

Název v anglickém jazyce

Flume Flows Between Boundaries of Very Different Roughness: Evaluation of Friction Using ADV Measurements

Popis výsledku anglicky

Two ADV probes were used for the measurements of the local velocities and turbulent characteristics in boundary layers of flume flows in order to determine friction conditions at the flow boundaries. Three configurations of the top of the flow were tested and mutually compared: the flow with free water surface, the flow with water surface covered by a smooth solid plate and the flow with water surface covered by a very rough solid plate. The tests carried out for various installed flow rates and water depths showed that a presence of a solid plate at the top of the flow significantly affected the velocity profile and turbulent characteristics in the flow. Hence the presence of the water-surface cover considerably increased the shear velocity at the bottom of the flow. The paper comments on the test results and quantifies the effects of the velocity-profile deformation to the friction conditions at the bottom of the flow.

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

<a href="/cs/project/1M0579" target="_blank" >1M0579: Centrum integrovaného navrhování progresivních stavebních konstrukcí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 6th Int. Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering

ISBN

978-80-87117-05-7

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

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Název nakladatele

České vysoké učení technické v Praze

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

9. 9. 2008

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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