# pulsating flow in a pipe journal of fluid mechanics

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### Pulsating flow in a pipe Journal of Fluid Mechanics

Apr 20, 2006 · Turbulent and laminar pulsating flows in a straight smooth pipe are compared at identical frequencies and Reynolds numbers. Most measurements were made at a mean Reynolds number of 4000, but the influence of Re was checked for 2900 < Re < 7500.sp.info Transition to turbulence in pulsating pipe flow In pulsating flow for a meaningful measure of the transition threshold puffs during their passage through the pipe have to experience at least one pulsation cycle. Otherwise the measured lifetimes are phase dependent. Meaning that if a puff only experiences part of a cycle it experiences a mean Reynolds number different from that of the full cycle.sp.info Pulsating flow in a pipe — University of ArizonaApr 01, 1985 · Turbulent and laminar pulsating flows in a straight smooth pipe are compared at identical frequencies and Reynolds numbers. Most measurements were made at a mean Reynolds number of 4000, but the influence of Re was checked for 2900 < Re < 7500.sp.info Intermittent turbulence in a pulsating pipe flow Mar 06, 2008 · Numerical simulations of the pulsating flow in a pipe of circular cross-section characterized by small imperfections are carried out to determine the conditions leading to the appearance of turbulence. The results show that in the oscillatory case (no steady velocity component of the basic flow), the critical value of the Reynolds number Rδ

### Pulsating pipe flow with large-amplitude oscillations

Pulsating turbulent pipe flow in the current dominated regime at high and very-high frequencies. International Journal of Heat and Fluid Flow, Vol. 58, Issue. , p. International Journal of Heat and Fluid Flow, Vol. 58, Issue. , p.sp.info (PDF) Pulsating flow in a pipe - ResearchGatePulsating flow in a pipe By L. SHEMER, I. WYGNANSKI AND E. KIT Department of Fluid Mechanics and Heat Transfer, Faculty of Engineering, Tel-Aviv University, Ramat-Aviv 69978, Israel (Received 27sp.info Pulsating pipe flow with large-amplitude oscillations The incompressible pulsating flow through a circular pipe with diameter $D$ and axial length $L_{z}$ is driven by a time-dependent harmonic body force of prescribed mean, amplitude and frequency. The resulting flow has a volume-averaged velocity with a steady component $U_{b}$ and a harmonically time-varying one $U_{o}$ with pulsation ${\it\omega}$ .sp.info Pulsating flow in a pipe - NASA/ADSApr 01, 1985 · adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

### Purely pulsating flow of a viscoelastic fluid in a pipe

Mar 01, 2015 · The pulsating flow in a wide pipe of a viscoelastic fluid is considered. • Simple approximate solution using the method of two scales is obtained. • Flow structure is easily described by two algebraic functions of the Deborah number. Abstract The flow of a Maxwell fluid in a pipe generated by a pulsating pressure gradient is considered.sp.info On pulsating flow of polymeric fluids - ScienceDirectJan 01, 1978 · The flow problem of an elastico-viscous fluid in a straight circular pipe under the influence of a fluctuating pressure gradient is considered. Adoptisp.info Analysis of the Nusselt number in pulsating pipe flow Jul 01, 1997 · Based on the pulsation due to pressure gradi- ent in equation (3), the space-averaged velocity (a) can be eed as 2/32 a= 1 +Af sin (~e t+~b) where Ar is the pulsation amplitude, and q~ is the phase of a with respect to the pressure pulsation. When Af ~ 1, reverse flows are encountered at some times.sp.info Analytical solution of pulsating flow and forced Dec 01, 2021 · Analytical solution of pulsating flow and forced convection heat transfer in a pipe filled with porous medium. In this paper, the pulsating flow and forced convection heat transfer in a pipe filled with porous medium is investigated. The pipe is under a constant heat flux. The governing equations of the problem includes continuity, Brinkman momentum equation and

### Pulsating flow of a plastic fluid Nature

Apr 01, 1982 · The magnitude of this flow enhancement depends on the fluid properties and is a function of the mean pressure gradient and the amplitude and the frequency of its varying component. Theoretical sp.info On transition of the pulsatile pipe flow Semantic ScholarJournal of Fluid Mechanics. 2008; Numerical simulations of the pulsating flow in a pipe of circular cross-section characterized by small imperfections are carried out to determine the conditions leading to the appearance of Expand. 22. Save. Alert.sp.info Experimental Investigation on Pulsating Flow in a Bendcycle pulsating flow was generated by superimposing an oscillating flow driven by a piston installed in a scotch yoke mechanism on a steady flow supplied by a pump. Thus, the instantaneous axial velocity averaged over the cross section, W. a, can be eed in the form 𝑊. 𝑎 =, 𝑎 + 𝑠𝑖𝑛 (1) Here, (= tsp.info VIBRATION OF A FLEXIBLE PIPE CONVEYING VISCOUS Feb 17, 2000 · Poisson coupling between the pipe wall and fluid is also incorporated in the model. A combination of the finite difference method and the method of characteristics is employed to extract displacements, hydrodynamic pressure and flow velocities from the equations. A numerical example of a pipeline conveying fluid with a pulsating flow is given and discussed.

### Numerical Investigation of pulsating Flow in 2

increases from 0-90⁰ for pulsation of infinite frequency [2]. Pulsating incompressible flow in a straight, rigid, circular tube or channel are canonical phenomena of classical fluid mechanics. The heat transfer with pulsating flow is concern to researchers as heat transfer increases or decreases or no change according to fluctuation insp.info Experimental Investigation of Pulsating Turbulent Flow Jan 16, 2017 · Abstract. This paper presents the results of an experimental study on a pulsating turbulent flow through conical diffusers with total divergence angles (2θ) of 12 , 16 , and 24 , whose inlet and exit were connected to long straight pipes. To examine the effects of the divergence angle and the nondimensional frequency on flow characteristics, experiments were sp.info (PDF) On pulsating flow of polymeric fluids Nhan Phan On pulsating flow of polymeric fluids. Nhan Phan-Thien. 167 Journal of Non-Newtonian Fluid Mechanics, 4 (1978) 167-176 0 Elsevier Scientific Publishing Company, Amsterdam - Printed in The Netherlands zyxwvutsrqponmlkj ON PULSATING FLOW OF POLYMERIC FLUIDS N. PHAN-THIEN Department of Mechanical Engineering, Sydney University, Sydney 2006 (Australia) sp.info (PDF) A BRIEF REVIEW ON LAMINAR TO TURBULENT Nov 02, 2008 · Abstract. Transition from laminar to turbulent flow in a pipe is one of the oldest and most fundamental problems in fluid mechanics. This phenomenon for time-dependent flows has been investigated

### Influence of Pulsating Flow on Thermal Characteristics in

Oct 22, 2021 · Nishandar, S. V., & Yadav, R. H. (2015). Experimental investigation of heat transfer characteristics of pulsating turbulent flow in a pipe. International Research Journal of Engineering and Technology, 02, 487–492. Google Scholarsp.info JFFHMT - Journal of Fluid Flow, Heat and Mass Transfer1. We are pleased to announce that the Journal of Fluid Flow, Heat and Mass Transfer (JFFHMT) has been approved by the Committee on Publication Ethics (COPE). JFFHMT has been working hard to abide by the guidelines of ethics, integrity, and high standards in publishing. 2.sp.info Output power measurement of a blood pump considering Mar 29, 2012 · L. Shemer, I. Wygnanski and E. Kit, Pulsating flow in a pipe, Journal of Fluid Mechanics, 153 (1985) 313–337. Article Google Scholar [5] L. Shemer, E. Kit and I. Wygnanski, On the impedance of the pipe in laminar and turbulent pulsating flows, Experiments in Fluids, 3 (1985) 185–189. Article Google Scholar [6]sp.info Numerical Study of Secondary Flows in a Sinusoidal Pipe1. S. Murata, et al., Laminar flow in a curved pipe with varying curvature, Journal of Fluid Mechanics, 73, 736-752 (1976). 2. T. Inaba, and S Murata, Pulsating Laminar-flow in a sinusoidally curved pipe, Bulletin of the JSME Japan Society Of

### Pulsating Flow for Mixing Intensification in a Twisted

Nov 24, 2009 · In this work the flow entering the twisted pipe undergoes a pulsatile motion. The flow is studied experimentally and numerically. The numerical study is carried out by a computational fluid dynamics (CFD) code (FLUENT 6) in which a pulsatile velocity field is imposed as an inlet condition. The experimental setup involves principally a “Scotch sp.info Mass Flow Rate Controlled Fully Developed Laminar Mar 06, 2005 · Pressure gradient driven, laminar, fully developed pulsating pipe flows have been extensively studied by various researchers and the data for the resultant flow field are available in a number of publications.The present paper, however, concentrates on related flows that are mass flow driven, i.e., the flows where the mass flow rate is prescribed as m ̇ = m ̇ M + m ̇ A f sp.info Journal of Non-Newtonian Fluid Mechanics Vol 217, Pages Read the latest articles of Journal of Non-Newtonian Fluid Mechanics at ScienceDirect, Elsevier’s leading platform of peer-reviewed scholarly literaturesp.info Pulsating Flow of Polymer Solutions Industrial Journal of Non-Newtonian Fluid Mechanics 2010, 165 (3-4) , 174-183. Flow-rate characteristics for the pulsating flow of a nonlinear viscoelastic polymer solution in a pipe. Journal of Engineering Physics 1988, 54 (6) , Pulsating

### Analysis of Transient Pulse Electroosmotic Flow of Maxwell

the fluid gradually tends to become a Hookean elastic solid. Thus, the flow takes longer time to attain the steady status [45]. Figure 3 depicts the variations of normalized pulse EOF velocity with time for different relaxation time λ ¯ 1 (0.1, 0.3, 0.5 and 0.7). As expected, we can find that for fixed pulse width a , the amplitude of the normalized pulse EOF velocity profiles at the center sp.info