Numerical analysis of transient flow through a pipe orifice: time constant for the settling flow

T. Hayase, Ping Cheng Ping, S. Hayashi

Research output: Contribution to journalArticlepeer-review

Abstract

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

Original languageEnglish
Journal[No source information available]
Publication statusPublished - 1992 Jan 1

ASJC Scopus subject areas

  • Engineering(all)

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