Analysis of Velocity Distribution in Pulsating Turbulent Pipe Flow with Time-Dependent Friction Velocity

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概要

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• Fundamental equation for pulsating turbulent flow in a circular tube, in which the Reynolds stress is described in terms of eddy viscosity expressed with friction velocity, is approximated by a finite difference equation. Numerical solutions of the cross-sectional velocity distributions are obtained in two cases of time-dependent friction velocity and of time-independent one. It is shown numerically or experimentally that for very low frequencies the flow is in quasi-steady state. At low frequencies, only the results of the analysis with time-dependent friction velocity agree well with the experimental results. At high frequencies, the results of the analysis with time-dependent friction velocity agree with those those with time-independent one, and both of them coincide with the experimental results.

• 一般社団法人日本機械学会の論文

著者

• Usui Tateo

  Faculty Of Engineering Osaka University

• Ohmi M

  Teikyo Univ. Utsunomiya Jpn

• KYOMEN Susumu

  Kure National College of Technology

• OHMI Munekazu

  Professor, Faculty of Engineering, Osaka University

• KYOMEN Susumu

  Lecturer, Kure Technical College

• USUI Tateo

  Assistant, Faculty of Engineering, Osaka University

関連論文

• Flow Pattern and Frictional Losses in Pulsating Pipe Flow : Part 5, Wall Shear Stress and Flow Pattern in a Laminar Flow
• Flow Pattern and Frictional Losses in Pulsating Pipe Flow : Part l, Effect of Pulsating Frequency on the Turbulent Flow Pattern
• A Experimental Study of Velocity Distribution and Inlet Length in the Inlet Region of Laminar Oscillatory Pipe Flow : Series B : Fluid Engineering, Heat Transfer, Combustion, Power, Thermophysical, Properties
• Turbulent Slug and Velocity Field in the Inlet Region for Pulsatile Pipe Flow : Fluids Engineering
• Flow Patterns and Frictional Losses in an Oscillating Pipe Flow
• Transition to Turbulence in a Pulsatile Pipe Flow Part 1,Wave Forms and Distribution of Pulsatile Velocities near Transition Region
• Pressure and Velocity Distributions in Pulsating Turbulent Pipe Flow Part 2 Experimental Investigations
• Combined Free and Forced Convection for Laminar Steady Flow in Horizontal Tubes
• Numerical Analysis of Transient Turbulent Flow in a Liquid Line
• Numerical Analysis of a Periodically Varying Flow in a Circular Tube Containing a Slightly Compressible Fluid
• Numerical Analysis of Pressure and Velocity Distributions for a Pulsating Turbulent Flow in a Circular Tube Containing a Slightly Compressible Fluid
• Analysis of Velocity Distribution in Pulsating Turbulent Pipe Flow with Time-Dependent Friction Velocity
• Pressure and Velocity Distributions in Pulsating Turbulent Pipe Flow Part 1 Theoretical Treatments

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