Turbidity currents propagating down an inclined slope: particle auto-suspension

The turbidity current (TC), a ubiquitous fluid–particle coupled phenomenon in the natural environment and engineering, can transport over long distances on an inclined terrain due to suspension mechanism. A large-eddy simulation discrete element method model is employed simulate particle-laden gravity currents slope order investigate auto-suspension mechanism from Lagrangian perspective. particle Reynolds number our TC $0.01\sim 0.1$ angle $1/20 \sim 1/5$ . influences of initial concentration flow regimes, movement patterns, interactions, energy budget index are explored. results indicate that particles predominantly appear near head their increases then decreases during evolution, which positively correlated with coherent structures around head. When propagates downstream, average remains basically unchanged, higher than other transported particles. exhibits negative correlation current. Furthermore, increase will enhance velocity, allows advance faster improves perpendicular support, thereby increasing capacity. Increasing result slightly larger front while effect total force insignificant.