A Multiscale Approach for the Numerical Simulation of Turbulent Flows with Droplets.

ABSTRACT: A multiscale approach for the detailed simulation of water droplets dispersed in a turbulent airflow is presented. The multiscale procedure combines a novel representative volume element (RVE) with the Pseudo Direct Numerical Simulation (P-DNS) method. The solution at the coarse-scale relies on a synthetic model, constructed using precomputed offline RVE simulations and an alternating digital tree, to characterize the non-linear dynamic response at the fine-scale. A set of numerical experiments for a wide range of volume fractions, particle distribution sizes, and external shear forces in the RVE are carried out. Quantitative results of the statistically stationary turbulent state are obtained, and the turbulence modulation phenomenon due to the presence of droplets is discussed. The devel

SUBMITTER: Gimenez JM 

PROVIDER: S-EPMC8235920 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature