Effect of thermal non-equilibrium on decaying isotropic turbulence

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

4 Scopus citations

Abstract

The effect of vibrational relaxation on turbulent motion is studied for compressible isotropic turbulence. The flow-field is initialized with a nonzero divergence velocity field and fluctuating density, temperature, and pressure. The effect of turbulent Mach number and temperature is observed to have a similar effect on the fluctuating quantities as that of altering the vibrational relaxation time. No significant difference in the decay of turbulent kinetic energy was observed when vibrational relaxation is included. The thermodynamic fluctuating quantities are shown to be damped by vibrational relaxation. This damping increases as the vibrational relaxation rate is increased. The primary energy exchange is observed to be between the translational and vibrational energy modes. Virtually no exchange between kinetic and internal energy modes is seen.

Original languageEnglish (US)
Title of host publicationAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102936
StatePublished - Jan 1 2014
EventAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference 2014 - Atlanta, GA, United States
Duration: Jun 16 2014Jun 20 2014

Publication series

NameAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference

Other

OtherAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference 2014
CountryUnited States
CityAtlanta, GA
Period6/16/146/20/14

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