156 citations · 634 across the 13 of their papers we have counts for
13 papers
Lagrangian supersaturation fluctuations at the cloud edge
J. Fries, G. Sardina, G. Svensson +2
Evaporation of cloud droplets accelerates when turbulence mixes dry air into the cloud, affecting droplet-size distributions in atmospheric clouds, combustion sprays, and jets of e…
Assessing passive scalar dynamics in bubble-induced turbulence using DNS
Niklas Hidman, Henrik Ström, Srdjan Sasic +1
By using Direct Numerical Simulations (DNS) of bubbly flows with passive scalars, we show a transition in the scalar spectra from a to a scaling with the wavenu…
Key parameters for droplet evaporation and mixing at the cloud edge
J. Fries, G. Sardina, G. Svensson +1
The distribution of liquid water in ice-free clouds determines their radiative properties, a significant source of uncertainty in weather and climate models. Evaporation and turbul…
Buoyancy-driven flow through a bed of solid particles produces a new form of Rayleigh-Taylor turbulence
G. Sardina, L. Brandt, G. Boffetta +1
Rayleigh--Taylor fluid turbulence through a bed of rigid, finite-size, spheres is investigated by means of high-resolution Direct Numerical Simulations (DNS), fully coupling the fl…
Statistics of particle accumulation in spatially developing turbulent boundary layers
Gaetano Sardina, Francesco Picano, Philip Schlatter +2
We present the results of a Direct Numerical Simulation of a particle-laden spatially developing turbulent boundary layer up to Reθ = 2500. Two main features differentiate the beha…
Reduced particle settling speed in turbulence
Walter Fornari, Francesco Picano, Gaetano Sardina +1
We study the settling of finite-size rigid spheres in sustained homogeneous isotropic turbulence (HIT) by direct numerical simulations using an immersed boundary method to account…
Continuous growth of droplet size variance due to condensation in turbulent clouds
Gaetano Sardina, Francesco Picano, Luca Brandt +1
We use a stochastic model and direct numerical simulation to study the impact of turbulence on cloud droplet growth by condensation. We show that the variance of the droplet size d…
Particle transport in turbulent curved pipe flow
Azad Noorani, Gaetano Sardina, Luca Brandt +1
Direct numerical simulations (DNS) of particle-laden turbulent flow in straight, mildly curved and strongly bent pipes are performed in which the solid phase is modelled as small h…
Numerical simulations of aggregate breakup in bounded and unbounded turbulent flows
Matthaus U. Babler, Luca Biferale, Luca Brandt +8
Breakup of small aggregates in fully developed turbulence is studied by means of direct numerical simulations in a series of typical bounded and unbounded flow configurations, such…
Exact regularized point particle method for multi-phase flows in the two-way coupling regime
P. Gualtieri, F. Picano, G. Sardina +1
Particulate flows have been largely studied under the simplifying assumptions of one-way coupling regime where the disperse phase do not react-back on the carrier fluid. In the con…
The effect of the Basset history force on particle clustering in Homogeneous and Isotropic Turbulence
Stefano Olivieri, Francesco Picano, Gaetano Sardina +2
We study the effect of the Basset history force on the dynamics of small particles transported in homogeneous and isotropic turbulence and show that this term, often neglected in p…
Accumulation of motile elongated micro-organisms in turbulence
Caijuan Zhan, Gaetano Sardina, Enkeleida Lushi +1
We study the effect of turbulence on marine life by performing numerical simulations of motile microorganisms, modelled as prolate spheroids, in isotropic homogeneous turbulence. W…
Dispersion of swimming algae in laminar and turbulent channel flows: consequences for photobioreactors
O. A. Croze, G. Sardina, M. Ahmed +2
Shear flow significantly affects the transport of swimming algae in suspension. For example, viscous and gravitational torques bias bottom-heavy cells to swim towards regions of do…