Extension of the momentum transfer model to time-dependent pipe turbulence

We analyze a possible extension of Gioia and Chakraborty's momentum transfer model of friction in steady turbulent pipe flows to the case of time- and/or space-dependent turbulent flows. The end result is an expression for the stress at the wall as the sum of a steady and a dynamic component. T...

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Autor principal: Calzetta, E.
Formato: JOUR
Materias:
Dynamic component
Flow acceleration
Mean flow
Spatial derivatives
Stationary flow
Time-dependent
Turbulent pipe flow
Weighted averages
Weighting functions
Condensed matter physics
Physics
Momentum transfer
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15393755_v85_n2_p_Calzetta
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_15393755_v85_n2_p_Calzetta2023-10-03T16:22:40Z Extension of the momentum transfer model to time-dependent pipe turbulence Calzetta, E. Dynamic component Flow acceleration Mean flow Spatial derivatives Stationary flow Time-dependent Turbulent pipe flow Weighted averages Weighting functions Condensed matter physics Physics Momentum transfer We analyze a possible extension of Gioia and Chakraborty's momentum transfer model of friction in steady turbulent pipe flows to the case of time- and/or space-dependent turbulent flows. The end result is an expression for the stress at the wall as the sum of a steady and a dynamic component. The steady part is obtained by using the instantaneous velocity in the expression for the stress at the wall of a stationary flow. The unsteady part is a weighted average over the history of the flow acceleration, with a weighting function similar to that proposed by Vardy and Brown, but naturally including the effect of spatial derivatives of the mean flow, as in the Brunone model. © 2012 American Physical Society. Fil:Calzetta, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15393755_v85_n2_p_Calzetta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Dynamic component
Flow acceleration
Mean flow
Spatial derivatives
Stationary flow
Time-dependent
Turbulent pipe flow
Weighted averages
Weighting functions
Condensed matter physics
Physics
Momentum transfer
spellingShingle Dynamic component
Flow acceleration
Mean flow
Spatial derivatives
Stationary flow
Time-dependent
Turbulent pipe flow
Weighted averages
Weighting functions
Condensed matter physics
Physics
Momentum transfer
Calzetta, E.
Extension of the momentum transfer model to time-dependent pipe turbulence
topic_facet Dynamic component
Flow acceleration
Mean flow
Spatial derivatives
Stationary flow
Time-dependent
Turbulent pipe flow
Weighted averages
Weighting functions
Condensed matter physics
Physics
Momentum transfer
description We analyze a possible extension of Gioia and Chakraborty's momentum transfer model of friction in steady turbulent pipe flows to the case of time- and/or space-dependent turbulent flows. The end result is an expression for the stress at the wall as the sum of a steady and a dynamic component. The steady part is obtained by using the instantaneous velocity in the expression for the stress at the wall of a stationary flow. The unsteady part is a weighted average over the history of the flow acceleration, with a weighting function similar to that proposed by Vardy and Brown, but naturally including the effect of spatial derivatives of the mean flow, as in the Brunone model. © 2012 American Physical Society.
format JOUR
author Calzetta, E.
author_facet Calzetta, E.
author_sort Calzetta, E.
title Extension of the momentum transfer model to time-dependent pipe turbulence
title_short Extension of the momentum transfer model to time-dependent pipe turbulence
title_full Extension of the momentum transfer model to time-dependent pipe turbulence
title_fullStr Extension of the momentum transfer model to time-dependent pipe turbulence
title_full_unstemmed Extension of the momentum transfer model to time-dependent pipe turbulence
title_sort extension of the momentum transfer model to time-dependent pipe turbulence
url http://hdl.handle.net/20.500.12110/paper_15393755_v85_n2_p_Calzetta
work_keys_str_mv AT calzettae extensionofthemomentumtransfermodeltotimedependentpipeturbulence
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