Abstract
The research presents the numerical modeling findings of the secondary breakup of droplets of coal water slurries containing petrochemicals (CWSP) droplet with the filter cake content of 50 % for different Weber number values. The modeling method of the secondary droplet breakup is based on the VOF method for interface resolution, LES model for describing turbulence, and the technology of adapted dynamic grids. This technology enables the grid to be automatically concentrated in the region of large solution gradients during the calculation. The implementation of such a highly detailed grid allowed resolving secondary droplets with the dimensions down to 15 μm. We established the droplet breakup modes depending on the Weber number ranging from 36 to 342. The structure of the stream behind droplets was studied in detail and the numerical method was tested. The results are in good agreement with the results of known experiments.
Highlights
Dispersed systems comprised of water, milled coal or combustible coal processing wastes, are quite a promising alternative fuel for energy generation
The jet atomization is accompanied by its primary breakup and formation of liquid droplets that suffer deformation under aerodynamic force, which can lead to droplet breakup
Where τ is the tensor of viscous stresses, F is the vector of volume forces, p is static pressure, ρ is the density of a two-phase medium
Summary
Dispersed systems comprised of water, milled coal or combustible coal processing wastes, are quite a promising alternative fuel for energy generation. The aim of this study is to test the numerical method of destruction of individual drops of non-Newtonian fluids in the flow. The gas-droplet flows can be described using a wide variety of mathematical models.
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