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Description
  • Flow unsteadiness is a typical feature of both combined and storm sewer flow. The aim of the study is to define the relationship between flow unsteadiness and selected flow/turbulence characteristics estimated in a circular tube running partially full using the Ultrasonic Velocity Profiler (UVP) method. Generally, the absolute values of turbulent characteristics are larger in the rising branch of the hydrograph than in the descending one for the same flow depths. This difference in absolute values is related to the flow equilibrium parameter. Furthermore, the influence of the sediment bed on selected flow/turbulence variables was studied. The results show a strong impact of cross section geometry on local values of friction velocity, i.e. bottom shear stress, along the wetted perimeter of the channel cross section.
  • Flow unsteadiness is a typical feature of both combined and storm sewer flow. The aim of the study is to define the relationship between flow unsteadiness and selected flow/turbulence characteristics estimated in a circular tube running partially full using the Ultrasonic Velocity Profiler (UVP) method. Generally, the absolute values of turbulent characteristics are larger in the rising branch of the hydrograph than in the descending one for the same flow depths. This difference in absolute values is related to the flow equilibrium parameter. Furthermore, the influence of the sediment bed on selected flow/turbulence variables was studied. The results show a strong impact of cross section geometry on local values of friction velocity, i.e. bottom shear stress, along the wetted perimeter of the channel cross section. (en)
  • Nestacionarita proudění je typickou vlastností proudění odpadní vody v jednotných stokových systémech. Cílem studie je definovat vztah mezi nestacionaritou proudění a vybranými charakteristikami proudění a turbulence, které byly stanoveny v kruhovém potrubí při proudění s volnou hladinou metodou UVP. Obecně platí, že absolutní hodnoty turbulentních charakteristik dosahují vyšších hodnot ve stoupající větvi hydrogramu než ve větvi klesající. Tato odchylka je úměrná parametru rovnováhy v tekutině. Dále byl posuzován vliv deponovaných sedimentů na dně potrubí na parametry proudění a turbulence. Výsledky dokumentují silný vliv geometrie příčného průřezu na lokální hodnoty třecí rychlosti tzn. smykového napětí podél omočeného obvodu příčného průřezu potrubí. (cs)
Title
  • Spatial and Temporal Variation of Turbulence Characteristics in Combined Sewer Flow
  • Spatial and Temporal Variation of Turbulence Characteristics in Combined Sewer Flow (en)
  • Prostorová a časová změna charakteristik turbulence proudění v jednotný stokových systémech (cs)
skos:prefLabel
  • Spatial and Temporal Variation of Turbulence Characteristics in Combined Sewer Flow
  • Spatial and Temporal Variation of Turbulence Characteristics in Combined Sewer Flow (en)
  • Prostorová a časová změna charakteristik turbulence proudění v jednotný stokových systémech (cs)
skos:notation
  • RIV/68407700:21110/08:01148389!RIV09-MSM-21110___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GP103/07/P269), Z(MSM6840770002)
http://linked.open...iv/cisloPeriodika
  • 3-4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 396272
http://linked.open...ai/riv/idVysledku
  • RIV/68407700:21110/08:01148389
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Reynolds stress; circular conduit; sediment deposits; sewer; turbulence intensity; unsteady flow; velocity profile (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [960978F87458]
http://linked.open...i/riv/nazevZdroje
  • Flow Measurement and Instrumentation
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 19
http://linked.open...iv/tvurceVysledku
  • Pollert, Jaroslav
  • Bareš, Vojtěch
  • Jirák, Jakub
http://linked.open...ain/vavai/riv/wos
  • 000255927300004
http://linked.open...n/vavai/riv/zamer
issn
  • 0955-5986
number of pages
http://localhost/t...ganizacniJednotka
  • 21110
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