Dispersed Phase of Non-Isothermal Particles in Rotating Turbulent Flows

TL;DR

This paper investigates how rotation and gravity affect the temperature and behavior of non-isothermal particles in turbulent flows, deriving macroscopic equations and revealing that turbulence does not alter the mean temperature of settling particles.

Contribution

It introduces new effects caused by rotation and gravity interactions in turbulent flows and derives macroscopic equations for non-isothermal particle phases.

Findings

Homogeneous, isotropic turbulence does not influence the mean temperature of settling particles.

Rotation and gravity interactions induce specific effects on particle temperature in turbulence.

Derived macroscopic equations for non-isothermal particles in rotating turbulent flows.

Abstract

We suggest certain effects, caused by interaction between rotation and gravitation with turbulence structure, for the cooling/heating of dispersed phase of non-isothermal particles in rotating turbulent fluid flows. These effects are obtained through the derivation of kinetic or probability density function based macroscopic equations for the particles. In doing so, for one-way temperature coupling, we also show that homogeneous, isotropic non-isothermal fluid turbulence does not influence the mean temperature (though it influences mean velocity) of the dispersed phase of particles settling due to gravitational force in the isotropic turbulence.