Numerical analysis demonstrates that the Saffman lift force suppresses near-wall particle accumulation in two-phase flow, indicating significant modulation of wall-bounded turbulence.
The Saffman force is one of the key factors for particle transport and hence the interaction among phases in two-phase wall-bounded turbulence. This numerical work finds that the accumulation of particles near the wall and preferential concentration in low-speed streaks are suppressed by the lift force, leading to destruction of the conditional hairpin vortices and decreasing velocity fluctuations near the wall. However, in the outer layer, the particle-turbulence interaction is increased by the lift force because of higher particle concentration.
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Li et al. (2024) studied this question.
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