Optimum length of tubes for heat transfer in turbulent flow at constant wall temperature

Yilmaz, ALPER

doi:10.1016/j.ijheatmasstransfer.2007.10.034

Optimum length of tubes for heat transfer in turbulent flow at constant wall temperature

Atıf İçin Kopyala

Yilmaz A.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, cilt.51, ss.3478-3485, 2008 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 51
Basım Tarihi: 2008
Doi Numarası: 10.1016/j.ijheatmasstransfer.2007.10.034
Dergi Adı: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.3478-3485
Çukurova Üniversitesi Adresli: Evet

Özet

Maximum heat transfer per cross-sectional area of a tube with smooth wall in turbulent flow at constant wall temperature is determined for a given pressure loss. The dimensionless tube length is determined dependent on the pressure Reynolds number, Prandtl number and inlet local pressure loss coefficient. Limiting cases for short and long tubes are separately investigated. Semi-empirical equations are derived for both optimum dimensionless tube length and dimensionless maximum heat flow per cross-sectional area using numerically obtained values with a maximum deviation of +/- 6.6%,, and with a RMSE of 3.5%. The results can also be applied to the channels with non-circular cross-sectional area. (c) 2007 Elsevier Ltd. All rights reserved.