Settling and clustering of snow particles in atmospheric turbulence

Abstract

Abstract

Rising and Sinking in Resonance: Mass Distribution Critically Affects Buoyancy-Driven Spheres via Rotational Dynamics

“…Clearly, such an offset can also be expected to occur in a host of practical applications, where particle properties are rarely ever uniform. This concerns, for example, the falling of dandelion seeds [30] and snowflakes [31][32][33][34][35], the sedimentation behavior of sand grains and stones [36,37], chemical and biological reactors with (inverse) fluidized beds [38], as well as the transport of microplastic in the oceans [39]. Moreover, the practical relevance is rooted in the fact that we find that even small values of γ can affect the kinematics and dynamics of spherical particles significantly.…”

Evidence of preferential sweeping during snow settling in atmospheric turbulence

“…Understanding the settling dynamics of inertial particles in turbulence is important for predicting particle transport in the atmosphere, such as aeolian transport of dust and sand (Durán, Claudin & Andreotti 2011), formation and growth of droplets and particle aggregates in clouds (Shaw 2003), and precipitation of hydrometeors, such as raindrops, graupels and snowflakes (Garrett et al 2015;Nemes et al 2017;Zeugin et al 2020;Li et al 2021). Numerous laboratory experiments and numerical simulations have been conducted to investigate the effects of turbulence on the behaviour of inertial particles.…”

Shape- and scale-dependent coupling between spheroids and velocity gradients in turbulence

“…2021; Li et al. 2021; Samant et al. 2021), process engineering (Clift, Grace & Weber 2005; Lundell, Söderberg & Alfredsson 2011; Ardekani et al.…”

“…Extending this idea to spheroids (figure 1) offers a more intricate way to examine the Lagrangian flow structure since spheroids rotate due to both fluid rotation and strain, and thus the statistics of spheroid rotations reflect the Lagrangian dynamics of velocity gradients (Voth & Soldati 2017). Rotations of spheroidal particles and their coupling with velocity gradients are also important in applications where non-spherical particles are immersed in turbulent flows, such as microswimmers (Jumars et al 2009;Guasto, Rusconi & Stocker 2012;Pujara, Koehl & Variano 2018;Borgnino et al 2019;Bordoloi, Variano & Verhille 2020), atmospheric aerosol and sediment transport (Spurny 2000;Mehta 2013;Gustavsson & Mehlig 2016;Roy et al 2019;Gustavsson et al 2021;Li et al 2021;Samant et al 2021), process engineering (Clift, Grace & Weber 2005;Lundell, Söderberg & Alfredsson 2011;Ardekani et al 2017;Ardekani & Brandt 2018;Schneiders et al 2019;Will et al 2021) and flow diagnostics (Rosti et al 2018;Hejazi, Krellenstein & Voth 2019;Cavaiola, Olivieri & Mazzino 2020).…”