AN OVERVIEW ON PULSATILE FLOW DYNAMICS
Pulsatile flow dynamics in reference to the relevant experimental research on the manner between the time periods of 1997- 2015 is presented in this paper. The flow field under discussion is generated through a rigid circular cross-sectional pipe as an axial slightly- compressible and sinusoidal one in a controlled range of the oscillation parameters. Laminar and turbulent flow regimes are considered with a particular emphasis devoted to the transitional characteristics of laminar pulsatile flow into turbulence. The definitions of the flow characteristics, the methodology of the experimental studies and the results on the physical nature of the field are described. The departure of pulsatile flow from a steady one is presented in reference to the velocity field and frictional field analyse sunder the influence of oscillation frequency and amplitude. In this context, the critical magnitudes of Womersley number, time-averaged Reynolds number and oscillation amplitude to estimate the ranges of pulsatile flow field are proposed
Anahtar Kelimeler:
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AN OVERVIEW ON PULSATILE FLOW DYNAMICS
Pulsatile flow dynamics in reference to the relevant experimental research on the manner between the time periods of 1997- 2015 is presented in this paper. The flow field under discussion is generated through a rigid circular cross-sectional pipe as an axial slightly- compressible and sinusoidal one in a controlled range of the oscillation parameters. Laminar and turbulent flow regimes are considered with a particular emphasis devoted to the transitional characteristics of laminar pulsatile flow into turbulence. The definitions of the flow characteristics, the methodology of the experimental studies and the results on the physical nature of the field are described. The departure of pulsatile flow from a steady one is presented in reference to the velocity field and frictional field analyse sunder the influence of oscillation frequency and amplitude. In this context, the critical magnitudes of Womersley number, time-averaged Reynolds number and oscillation amplitude to estimate the ranges of pulsatile flow field are proposed
Keywords:
Pulsatile flow, Oscillation, Oscillation Frequency, Oscillation Amplitude Time –averaged Reynolds,
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- M.Ö. Çarpınlıoglu “An Approach for Transition Correlation of Laminar Pulsatile Pipe Flows via Frictional Field Characteristics” Journal of Flow Measurement and Instrumentation Volume: 14 Number: 6 pp: 233-242 (2003)
- M.Ö. Çarpınlıoglu, E. Özahi “An Updated Portrait on Transition to Turbulence in Laminar Pipe Flows with Periodic Time-Dependence (A Correlation Study)” Journal of Flow Turbulence and Combustion 89/4 pp: 691-711(2012)
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- E. Özahi, Analysis of Laminar-to Turbulent Transition in Time Dependent Pipe Flows, Ph.D Thesis, University of Gaziantep, Department of Mechanical Engineering (2011)
- M.Ö. Çarpınlıoglu, E.Özahi “An experimental test system for the generation, control and analysis of sinusoidal pulsatile pipe flows (An application case for time dependent flow measurements)”Journal
- Instrumentation V: 32pp: 27-34 (2013)
- E. Özahi, M. Ö. Çarpınlıoğlu “Determination of Transition Onset in Laminar Pulsatile Pipe Flows” Journal of Thermal Science and Technology/Türk Isı Bilimi ve Tekniği Dergisi V: 33 N 2 pp: 125-133(2013)
- E. Özahi, M. Ö. Çarpınlıoğlu “Definition of sub-classes in sinusoidal pulsatile air flow at onset of transition to turbulence in view of velocity and frictional field analyses” Measurement 64pp: 94-104(2015)
- E. Özahi, M. Ö. Çarpınlıoğlu “Devised application of
- Labview for an automatic test system based on generation,
- control and processing of pulsatile pipe flows” Journal of
- Thermal Science and Technology (Accepted February 2015)
- Başlangıç: 2015
- Yayıncı: YILDIZ TEKNİK ÜNİVERSİTESİ
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