Detection of the phenomenon of turbulent thermal diffusion in numerical simulations Academic Article uri icon

abstract

  • The phenomenon of turbulent thermal diffusion causing a non-diffusive turbulent flux of particles in the direction of the turbulent heat flux, is found using direct numerical simulations (DNS) in temperature-stratified turbulence. In simulations with and without gravity, a peak in the particle number density is found around the minimum of the mean fluid temperature for small Stokes numbers due to the phenomenon of turbulent thermal diffusion. This implies that this phenomenon causes formation of large-scale inhomogeneities in the spatial …

publication date

  • January 24, 2011