## 23.5.6 Maximum Packing Limit in Binary Mixtures

The packing limit is not a fixed quantity and may change according to the number of particles present within a given volume and the diameter of the particles. Small particles accumulate in between larger particles increasing the packing limit. For a binary mixture FLUENT uses the correlations proposed by [ 101].

For a binary mixture with diameters , the mixture composition is defined as

where

 (23.5-58)

The maximum packing limit for the mixture is given by

 (23.5-59) (23.5-60)

otherwise, the maximum packing limit for the binary mixture is

 (23.5-61)

The packing limit is used for the calculation of the radial distribution function.

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