Numerics

Flow modeling considerations

• Spatial vs. temporal mixing layer: the temporal mixing layer is simpler to simulate as periodic boundary conditions can be used; it has important features in common with the spatial mixing layer

• Droplet model: the flow around each drop is represented by a validated, laminar, model. Thus DNS in two-phase flow has different meaning from DNS in single phase flow wherein all scales are solved. Also, the droplet-carrier gas interaction needs to be modeled consistently.

• Reynolds number: the simulation viscosity, which is much higher than the physical one, is computed based on the Reynolds number

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