44 Summary

Modeling multiphase flow processes is a complex and still developing subject. It is often an iterative process requiring multiple modeling frameworks to understand different aspects of the flow problem. The underlying physics is still inadequately known and a reactor engineer modeling complex multiphase flow processes often has to complement detailed modeling efforts with validation experiments and data analysis. It is indeed essential to use a hierarchy of models with an appreciation of 'learning' versus 'simulation' models to represent multiphase flow processes accurately. An appropriate methodology needs to be developed to systematically interpret the results obtained using different modeling frameworks. Ultimately, there is no substitute for the engineering judgement and creativity of a reactor engineer to develop a tractable computational model to simulate complex industrial multiphase flow processes.

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