The Spray model

During the lifetime of the droplets they interact with the surrounding gases. Seen from the gas phase the droplets cause a distributed source of mass, momentum and energy, while seen from the liquid phase the gas acts on the droplets moving them around and make them evaporate and loose their mass.

The movements of the water droplets are treated in a Lagrangian way while the gas phase is treated in the Eulerian way, which means in relation to a fixed computational grid.

The cloud of droplets is represented by a number of discrete numerical droplets each representing a group/class of real droplets. The number of physical droplets represented by each numerical droplet i.e. the total number of numerical droplets to be used, depends on the computational capacity available.

The break up of droplets are treated by a Weber number criterion, in such a way that droplets are subsequently broken up until the Weber related criterion is satisfied.

The radiation absorption in droplets is treated as by a method developed at ComputIT in relation to the discrete transfer method of Lockwood and Shah.  

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