Heat removal from oscillating flow in a vertical annular channel


Akdag U., Özdemir M. , OZGUC A. F.

HEAT AND MASS TRANSFER, cilt.44, ss.393-400, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 44 Konu: 4
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1007/s00231-007-0248-5
  • Dergi Adı: HEAT AND MASS TRANSFER
  • Sayfa Sayıları: ss.393-400

Özet

In this study, heat removal from a surface, which is located into the reciprocating flow in a vertical annular liquid column, is investigated experimentally. The experiments are carried out for four different oscillation frequencies and three heat fluxes while the amplitude remains constant for all cases. Instantaneous and time-averaged surface and bulk temperature variations are presented. The cycle-averaged values are considered in the calculation of heat transfer using the experimental measurements. Heat removal from the cold surface due to the oscillating liquid column is determined in terms of Nusselt number. Based on the experimental data, an empirical equation is obtained for the cycle averaged Nusselt number as a function of kinetic Reynolds number.