Upflow turbulent mixed convection heat transfer in vertical pipes

Gian Piero Celata, Francesco Dannibale, Andrea Chiaradia, Maurizio Cumo

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The present work deals with the results of an experimental investigation on heat transfer in water cooled vertical pipes, for thermal-hydraulic conditions ranging from forced convective flow to mixed convective flow. The flow of water in the pipe is upwards. Experimental data confirm the reduction in the heat transfer rate for mixed convection in upward heat flow, mainly due to the laminarization effect in the near-wall region (buoyancy effect). They are in a very good agreement with numerical methods, such as the k-ε-model. A new method for the calculation of the heat transfer coefficient in upward mixed convection heated flow is proposed. It is based on the well-known superposition method (heated downflow) modified accounting for the phenomenology of the upward heated flow in comparison with downflow heated conditions.
Original languageEnglish
Pages (from-to)4037 - 4054
Number of pages18
JournalInternational Journal of Heat and Mass Transfer
Volume41
Issue number24
DOIs
Publication statusPublished - 1 Oct 1998

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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