Numerical analysis of transient flow through a pipe orifice. 1st report, time constant for the settling flow

Toshiyuki Hayase, Cheng Ping, Satoru Hayashi

Research output: Contribution to journalArticle

Abstract

As a fundamental consideration in hydraulic valve dynamics, transient flow through a pipe orifice has been studied via numerical analysis. Steady axisymmetric viscous fluid flow was first investigated to confirm the present SIMPLER-based finite volume methodology. Time-dependent calculation for a suddenly imposed pressure gradient has shown two distinct characteristic time constants for the transient state. The first characteristic time constant is commonly considered corresponding to the flow rate change, while the second one concerning the variation of flow structure has not been investigated in earlier studies. The final settling of the flow is established through the second characteristic time which is almost ten times larger than the first one for the present condition.

Original languageEnglish
Pages (from-to)1023-1029
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume59
Issue number560
DOIs
Publication statusPublished - 1993

Keywords

  • Computational Fluid Dynamics
  • Flow Meter
  • Fluid Power Systems
  • Fluid Transients
  • Pipe Orifice
  • Time Constant

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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