Abstract
We present a direct comparison between interface-resolved and one-way-coupled point-particle direct numerical simulations (DNS) of gravity-free turbulent channel flow laden with small inertial part ...
Highlights
Turbulent flows laden with small inertial particles are found in many environmental and industrial contexts
We present a direct comparison between interface-resolved and one-way-coupled point-particle direct numerical simulations (DNS) of gravity-free turbulent channel flow laden with small inertial particles, with high particle-to-fluid density ratio and diameter of approximately three viscous units
We have presented two particle-resolved DNS of turbulent channel flow laden with small inertial particles with volume fractions of 3 × 10−4 and 3 × 10−5
Summary
Turbulent flows laden with small inertial particles are found in many environmental and industrial contexts. Though experiments in particle-laden turbulence are insightful (Eaton & Fessler 1994; Kaftori, Hetsroni & Banerjee 1995), parameter-matched numerical simulations remain challenging, because of the numerical limitations in terms of Reynolds number and the need for experiments in well-controlled, often idealized, configurations. Recent efforts in this direction have been undertaken in the recent study by Wang et al (2019). We consider particle-laden turbulent channel flow, a widely studied case with minimal governing parameters and important to benchmark models for wall-bounded particle transport. We demonstrate that these dynamics can be well captured using the model proposed in the seminal work of Saffman (1965)
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