Relation to microscale models

Define phase space of mesoscale variables needed to describe a particle (velocity, volume, etc.) 

Model changes to one particle s mesoscale variables due to all other particles, fluid, body forces, etc. (one-particle density function) 

Closure occurs at the level of the one-particle density function 

The validation of mesoscale models can be carried out using the numerical solutions to microscale models (Tenneti et al, 2010), in much the same way as that in which DNS is used for model validation in turbulent single-phase flows. A typical mesoscale modeling strategy consists of four steps. 

Using insights based on the microscale description and a good understanding of the physics, develop a mesoscale model. 

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