Strong real-fluid effects on transcritical turbulent boundary layers at supercritical pressures

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Direct numerical simulation (DNS) of transcritical heated turbulent boundary layers on a zero-pressuregradient flat plate at supercritical pressures is conducted by solving the Ml compressible Navier-Stokes equations. To the best of my knowledge, the present DNS is the first DNS of zero-pressure-gradient flat-plate transcritical turbulent boundary layer. The peculiar interactions between the strongly non-linear real fluid effect at the transcritical condition and wall turbulence, and their resultant turbulence statistics and turbulent kinetic energy budget are reported. The results indicate the importance of the compressibility effects (especially contribution of the pressure-dilatation) in the transcritical turbulent boundary layers even in a low Mach number condition. The analyses suggest that the compressibility effects originate from the abrupt variation in the density in the transcritical regime, which induce the significant expansion processes with a small temperature change through Tpc and causes the peculiar reduction of the Reynolds stresses at the transcritical condition.

Original languageEnglish
Title of host publication9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015
PublisherTSFP-9
Volume2
ISBN (Electronic)9780000000002
Publication statusPublished - 2015 Jan 1
Event9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015 - Melbourne, Australia
Duration: 2015 Jun 302015 Jul 3

Other

Other9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015
CountryAustralia
CityMelbourne
Period15/6/3015/7/3

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Fingerprint Dive into the research topics of 'Strong real-fluid effects on transcritical turbulent boundary layers at supercritical pressures'. Together they form a unique fingerprint.

Cite this