Dust entrained by low flying helicopters leads to the degraded visual environment, brownout. Particle inception is a critical stage in the development of the dust cloud. Here, near-wall Lagrangian particle forces are considered through analyzing an approximate time-averaged full-scale rotor flow. This simplified flow does not attempt to predict brownout, instead it provides scales and velocity data in the near-wall region, compares the role of particle-fluid forces, and provides a foundation for Lagrangian entrainment models. The analysis shows that three characteristic particle sizes are exposed to different physics in different boundary layer zones, a function of the distance from the helicopter. Drag is the dominant aerodynamic force, co...
Rotorcraft brownout is caused by the entrainment of dust and sand particles in helicopter downwash, ...
Computational fluid dynamics (CFD) is used here to predict the behaviour of ground particles, uplift...
So far, numerical methods used for brownout considered empirical and semi-empirical models, but part...
A Lagrangian-Lagrangian dust cloud simulation methodology has been developed to help better understa...
A computational model is presented that can be used to simulate the development of the dust cloud th...
Brown's Vorticity Transport Model, coupled to an additional particle transport model, is used to sim...
The formation of the dust cloud that is associated with low-level helicopter operations in desert en...
Significant progress has been made to date in modelling, computationally, the formation and developm...
A computational model is presented for simulating the development of the dust cloud that can be entr...
Helicopters operating close to the ground in dusty environments tend to generate large clouds of dus...
In this work computational fluid dynamics is used to validate experimental results for a two-bladed ...
The phenomenon of “brownout” is characterized by a large cloud of sediment or dust that is formed ar...
Rotorcraft brownout is caused by the entrainment of dust and sand particles in helicopter downwash, ...
To advance the understanding of the phenomenon of brownout, a dual-phase flow environment induced by...
When hovering over sandy terrain, the rotor of helicopters generates a downward jet that induces res...
Rotorcraft brownout is caused by the entrainment of dust and sand particles in helicopter downwash, ...
Computational fluid dynamics (CFD) is used here to predict the behaviour of ground particles, uplift...
So far, numerical methods used for brownout considered empirical and semi-empirical models, but part...
A Lagrangian-Lagrangian dust cloud simulation methodology has been developed to help better understa...
A computational model is presented that can be used to simulate the development of the dust cloud th...
Brown's Vorticity Transport Model, coupled to an additional particle transport model, is used to sim...
The formation of the dust cloud that is associated with low-level helicopter operations in desert en...
Significant progress has been made to date in modelling, computationally, the formation and developm...
A computational model is presented for simulating the development of the dust cloud that can be entr...
Helicopters operating close to the ground in dusty environments tend to generate large clouds of dus...
In this work computational fluid dynamics is used to validate experimental results for a two-bladed ...
The phenomenon of “brownout” is characterized by a large cloud of sediment or dust that is formed ar...
Rotorcraft brownout is caused by the entrainment of dust and sand particles in helicopter downwash, ...
To advance the understanding of the phenomenon of brownout, a dual-phase flow environment induced by...
When hovering over sandy terrain, the rotor of helicopters generates a downward jet that induces res...
Rotorcraft brownout is caused by the entrainment of dust and sand particles in helicopter downwash, ...
Computational fluid dynamics (CFD) is used here to predict the behaviour of ground particles, uplift...
So far, numerical methods used for brownout considered empirical and semi-empirical models, but part...