Spatio-temporal characteristics of particle-induced deviations in two fluid flow fields

Abstract

We examine the spatial and temporal properties of the deviations caused by the presence of particles in the velocity and temperature fields of a fluid undergoing thermal convection. The root-mean-square of the deviations in both fluid fields are evaluated at uniform time intervals and varying configurations of the Rayleigh number Ra, and is characterized by a peak near tₙ = 10000 time steps. We also examine the long-term spatial extent of these deviations, and find that the main effect of the presence of particles in suspension is to slow down the fluid convection, as well as change its spatial characteristics. The results presented here may be of significance in delineating the effects of suspended particles on weather and ocean dynamics.