Calculation of wall heat transfer in pipeexpansion turbulent flows

W. D. Hsieh, K. C. Chang

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


A new modified low-Reynolds-number k-ε turbulence [Chang, Hsieh and Chen (CHC)] model, which possesses the proper near-wall limiting behaviors and is free of the singular defect occurring near the reattachment point when applied to separated flows, is examined for use in wall heat transfer problems in flow with pipe expansion geometry. Another eight low-Reynolds-number k-ε models, found in open literature, are also examined in this study. Attention is specifically focused on the flow region surrounding the reattachment point. Comparative results show that only the CHC model and the model developed by Abe et al. [Abe, Kondoh and Nagano (AKN model)] can yield satisfactory distributions of the Nusselt number along the wall. However, the CHC model adopted the same model constants as conventionally used for the standard k-ε model. Thus, the CHC model is more universal than the AKN model.

Original languageEnglish
Pages (from-to)3813-3822
Number of pages10
JournalInternational Journal of Heat and Mass Transfer
Issue number18
Publication statusPublished - 1996 Dec

All Science Journal Classification (ASJC) codes

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


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