Direct numerical simulation of turbulence and microphysics in the Pi Chamber

T MacMillan, RA Shaw, WH Cantrell, DH Richter - Physical Review Fluids, 2022 - APS
The Pi Chamber is a cloud chamber at Michigan Technological University that utilizes moist
turbulent Rayleigh-Bénard flow between two temperature-controlled, saturated plates to …

Scaling of turbulence and microphysics in a convection–cloud chamber of varying height

S Thomas, F Yang, M Ovchinnikov… - Journal of Advances …, 2023 - Wiley Online Library
The convection–cloud chamber enables measurement of aerosol and cloud microphysics,
as well as their interactions, within a turbulent environment under steady‐state conditions …

Sources of stochasticity in the growth of cloud droplets: Supersaturation fluctuations versus turbulent transport

P Prabhakaran, S Thomas, W Cantrell… - Journal of the …, 2022 - journals.ametsoc.org
The role played by fluctuations of supersaturation in the growth of cloud droplets is
examined in this study. The stochastic condensation framework and the three regimes of …

Persistent mixed‐phase states in adiabatic cloud parcels under idealised conditions

GC Abade, DG Albuquerque - Quarterly Journal of the Royal …, 2024 - Wiley Online Library
By assuming that liquid droplets and ice crystals within a computational grid box grow under
the same conditions, mean‐field representations of mixed‐phase clouds in numerical …

[HTML][HTML] Supersaturation variability from scalar mixing: Evaluation of a new subgrid-scale model using direct numerical simulations of turbulent Rayleigh–Bénard …

KK Chandrakar, H Morrison… - Journal of the …, 2022 - journals.ametsoc.org
Supersaturation fluctuations in the atmosphere are critical for cloud processes. A nonlinear
dependence on two scalars—water vapor and temperature—leads to different behavior than …

Lagrangian supersaturation fluctuations at the cloud edge

J Fries, G Sardina, G Svensson, A Pumir, B Mehlig - Physical Review Letters, 2023 - APS
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 …

Lagrangian and Eulerian supersaturation statistics in turbulent cloudy Rayleigh–Bénard convection: applications for LES subgrid modeling

KK Chandrakar, H Morrison… - Journal of the …, 2023 - journals.ametsoc.org
Turbulent fluctuations of scalar and velocity fields are critical for cloud microphysical
processes, eg, droplet activation and size distribution evolution, and can therefore influence …

Contactless optical hygrometry in LACIS-T

JL Nowak, R Grosz, W Frey… - Atmospheric …, 2022 - amt.copernicus.org
The Fast Infrared Hygrometer (FIRH), employing open-path tunable diode laser absorption
spectroscopy at the wavelengths near 1364.6896 nm line, was adapted to perform …

Modeling the Subgrid-Scale Scalar Variance: A Priori Tests and Application to Supersaturation in Cloud Turbulence

ST Salesky, K Gillis, J Anderson… - Journal of the …, 2024 - journals.ametsoc.org
The subgrid-scale (SGS) scalar variance represents the “unmixedness” of the unresolved
small scales in large-eddy simulations (LES) of turbulent flows. Supersaturation variance …

[图书][B] Mixing and evaporation at the cloud edge and angular dynamics of small crystals in viscous flow

J Fries - 2022 - gupea.ub.gu.se
How liquid water in atmospheric clouds distributes over droplets of different sizes is
important for the initiation of rainfall, and for the optical properties of the atmosphere. Droplet …