急拡大流路内流れの数値解についての一考察

URI http://harp.lib.hiroshima-u.ac.jp/it-hiroshima/metadata/4246
File
Title
急拡大流路内流れの数値解についての一考察
Title Alternative
A Consideration on the numerical solution in a sudden expansion channel flow
Author
氏名 中西 助次
ヨミ ナカニシ スケツグ
別名 Nakanishi Suketsugu
氏名 小田 伸剛
ヨミ オダ ノブタケ
別名 Oda Nobutake
Subject
Laminar Separated Flow
Numerical Study
Expansion Channel Flow
Navier-Stokes Equation
Finite Difference Method
Flow Pattern
Pressure Gradient.
Abstract

The objective of this study is to examine numerically the laminar separated flow in a symmetric sudden expansion channel. As a computational model of the symmetric sudden expansion channel, the two-dimensional channel with backward facing steps on both upper and lower walls were considered, and a small suction hole was placed at the lower wall underneath the step. Two-dimensional time-dependent Navier-Stokes equations and the equation of continuity were solved numerically by the finite different method. The calculation was performed on the conditions of suction flow rate dQ=0.0 and dQ=0.02 for the only case of Reynolds number Re=160 and expansion ratio (H+2h) /H=2.0 (H being channel width in the upstream of step and h being the step height). In this report, from the calculation results, the behaviors of flow pattern, the contours and vector distribution of pressure gradient with passage of time were presented. In addition, the convergence process in the steady state of flow was shown and was discussed for the convergence criterion in a steady state was satisfied.

Journal Title
広島工業大学研究紀要
Volume
29
Spage
75
Epage
82
Published Date
1995
Publisher
広島工業大学
ISSN
03851672
NCID
AN0021271X
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Old URI
Set
it-hiroshima