INVESTIGATION OF TURBULENCE MODELLING FOR THE ABRUPT PIPE EXPANSION.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Author(s)

  • Ching Chang Chieng

Detail(s)

Original languageEnglish
Journal / PublicationAmerican Society of Mechanical Engineers (Paper)
Publication statusPublished - 1983
Externally publishedYes

Conference

Title1983 ASME Applied Mechanics, Bioengineering, and Fluids Engineering Conference
PlaceUnited States
CityHouston
Period19 - 22 June 1983

Abstract

Some numerical simulations are reported of flow and heat transfer in the separated flow region created by an abrupt pipe expansion. The TEACH-PE computer program with the standard two equations model is the major basis of all computations. The results show that the heat transfer coefficient predicted by standard two equation model is too low when compared with experimental data of Zemanick and Dougall even if the secondary terms of the secondary terms of nonisotropic turbulent intensities, 'cross diffusion' of k and EPSILON, and abrupt pressure gradient effect are included. Secondly, the heat transfer coefficient behind back steps increases tremendously and is overestimated as the low-Reynolds number models are employed. (from author's abstract)