Excelによる同心長方形管内自然対流の数値解析

URI http://harp.lib.hiroshima-u.ac.jp/kure-nct/metadata/8477
File
Title
Excelによる同心長方形管内自然対流の数値解析
Title Alternative
Numerical Analysis with Excel for Natural Convection in Concentric Rectangular Duct
Author
氏名 野村 高広
ヨミ ノムラ タカヒロ
別名 Nomura Takahiro
Subject
Natural Convection
Heat Transfer
Numerical Analysis
Concentric Rectangular duct
自然対流
熱伝達
数値解析
同心長方形管
Abstract

The flow and heat transfer for two-dimensional horizontal concentric double rectangular duct with cooled outer duct and heated inner duct were analyzed by a finite-difference procedure. Numerical calculation used repeat calculation tool in "Excel" by a range of Pr=0.7, aspect ratio γ=1.0~2.5, Ra≦4060 and inclined angle φ=0~45°. Streamlines of natural convection, isotherms and local Nusselt number Nu were illustrated. It has been found next three results. (1) The flow patterns of natural convection consist of a pair of the "L-type" circulations in side and upper space with small vortices in upper space. (2) The number of small vortices depends on γ, Ra and φ. (3) Isothermal lines and Nu depend on the flow patterns of small vortices and L-type circulations.

Journal Title
呉工業高等専門学校研究報告
Issue
68
Spage
61
Epage
66
Published Date
2006
Publisher
呉工業高等専門学校
ISSN
0286-4037
NAID
110005050450
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Old URI
Set
kure-nct