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ArtikelConvective Heat Transfer Near One-Dimensional and Two-Dimensional Wall Temperature Steps  
Oleh: Moffat, Robert J. ; Eaton, John K. ; Mukerji, Debjit
Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Heat Transfer vol. 126 no. 2 (Apr. 2004), page 202-210.
Topik: temperature; convective heat transfer; wall temperature steps
Ketersediaan
  • Perpustakaan Pusat (Semanggi)
    • Nomor Panggil: JJ90.8
    • Non-tandon: 1 (dapat dipinjam: 0)
    • Tandon: tidak ada
    Lihat Detail Induk
Isi artikelSteady - state experiments with one - dimensional and two - dimensional calorimeters were used to study the convective heat transfer near sharp steps in wall temperature in a turbulent boundary layer. Data acquired under low and high freestream turbulence conditions indicated that spanwise turbulent diffusion is not a significant heat transport mechanism for a two - dimensional temperature step. The one - dimensional calorimeter heat transfer data were predicted within ± 5 percent using the STAN7 boundary layer code for situations with an abrupt wall temperature step. The conventional correlation with an unheated starting length correction, in contrast, greatly under - predicts the heat transfer for the same experimental cases. A new correlation was developed that is in good agreement with near and far - field semi -analytical solutions and predicts the calorimeter heat transfer data to within ± 2 percent for temperature step boundary condition cases.
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