Theoretical investigation of some thermal effects in turbulence modeling |
| |
Authors: | Lionel Mathelin Françoise Bataille Ye Zhou |
| |
Institution: | (1) LIMSI-CNRS, BP 133, 91403 Orsay, France;(2) PROMES-CNRS, Tecnosud, 66100 Perpignan, France;(3) Lawrence Livermore National Lab, Livermore, CA 94551, USA |
| |
Abstract: | Fluid compressibility effects arising from thermal rather than dynamical aspects are theoretically investigated in the framework
of turbulent flows. The Mach number is considered low and not to induce significant compressibility effects which here occur
due to a very high thermal gradient within the flowfield. With the use of the Two-Scale Direct Interaction Approximation approach,
essential turbulent correlations are derived in a one-point one-time framework. In the low velocity gradient limit, they are
shown to directly depend on the temperature gradient, assumed large. The impact of thermal effects onto the transport equations
of the turbulent kinetic energy and dissipation rate is also investigated, together with the transport equation for both the
density and the internal energy variance.
|
| |
Keywords: | Turbulence modeling Non-isothermal flow DIA Compressible turbulence |
本文献已被 SpringerLink 等数据库收录! |
|