Laminar Free convection in Vertical Concentrc Annular Ducts

• MARUYAMA Shigenao

抄録

A theoretical investigation is presented for free convection in vertical concentric annular ducts with uniform temperatures specified on inner and outer walls, taking account of the temperature dependence of the thermophysical properties of fluid. The perimeter average Nusselt numbers and dimensionless average axial velocities in the ducts of various cross sections are well correlated by usingξ as a characteristics length ; and the Nusselt numbers of the annular ducts show very good accordance with those of parallel plates rather than those of a circular duct. A general representation of the average Nusselt numbers is presented for wide ranges of the radius ratio and Prandtl number. When the fluid physical properties are evaluated at the average temperature of the fully developed flow, the variable property solutions correlate with the constant property solutions.

収録刊行物

• JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties

  JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties 31 (2), 276-282, 1988

  一般社団法人 日本機械学会

キーワード

• Convective Heat Transfer
• Free Convection
• Laminar Flow
• Annular Duct
• Uniform Wall Temperature
• Variable Thermophysical Properties

詳細情報

• CRID: 1390001205426471040
• NII論文ID: 110002494173
• NII書誌ID: AA10680596
• DOI: 10.1299/jsmeb1988.31.2_276
• ISSN: 09148817
• Web Site: https://www.jstage.jst.go.jp/article/jsmeb1988/31/2/31_2_276/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可