TY - JOUR
T1 - Investigation of small-scale droplet concentration inhomogeneities in a turbulent flow
AU - Grits, B.
AU - Pinsky, M.
AU - Khain, Alexander
PY - 2006/4
Y1 - 2006/4
N2 - This paper is focused on the numerical investigation of spatial characteristics of droplet concentration fluctuations, originating in a turbulent flow. The turbulent flow is simulated using a model of a statistically stationary, homogeneous and isotropic turbulent flow. We found that preferential droplet concentration with the maximum of spatial spectrum at about 1.5 cm is formed regardless of the droplet size (up to the droplet radius of 20 μm). The amplitude of fluctuations depends on the droplet radius and constitutes a significant part of mean concentration. Analogous simulations with non-inertial droplets (passive scalar) do not reveal such concentration fluctuations. Our main conclusion is, therefore, the following: preferential droplet concentration at the cm-scale forms in a turbulent flow due to droplets inertia.
AB - This paper is focused on the numerical investigation of spatial characteristics of droplet concentration fluctuations, originating in a turbulent flow. The turbulent flow is simulated using a model of a statistically stationary, homogeneous and isotropic turbulent flow. We found that preferential droplet concentration with the maximum of spatial spectrum at about 1.5 cm is formed regardless of the droplet size (up to the droplet radius of 20 μm). The amplitude of fluctuations depends on the droplet radius and constitutes a significant part of mean concentration. Analogous simulations with non-inertial droplets (passive scalar) do not reveal such concentration fluctuations. Our main conclusion is, therefore, the following: preferential droplet concentration at the cm-scale forms in a turbulent flow due to droplets inertia.
UR - http://www.scopus.com/inward/record.url?scp=33646013877&partnerID=8YFLogxK
U2 - 10.1007/s00703-005-0157-4
DO - 10.1007/s00703-005-0157-4
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AN - SCOPUS:33646013877
SN - 0177-7971
VL - 92
SP - 191
EP - 204
JO - Meteorology and Atmospheric Physics
JF - Meteorology and Atmospheric Physics
IS - 3-4
ER -