(122c) Hydrodynamics & Heat Transfer in Stirred Tanks with Liquid Solid Particulate Flows Using the Lattice Boltzmann Method

Multiphase liquid solid particulate flows involving heat transfer in stirred tanks are widely used in fermentation, emulsification, crystallization, homogeneous / heterogeneous reactions, pharmaceutical and agrochemical processes. Heat transfer involved in such operations is extremely critical as it can affect the reaction thermal runaway behavior or the desired particulate based product quality. In this work, we apply a Lattice Boltzmann based Euler-Lagrange CFD approach coupled with Discrete Phase (DPM) and Discrete Element (DEM) Models to simulate the transient temperature distribution of the solid particles, jacketed vessel, and the fluid within the Stirred Tank Reactors through accounting for the inter-particle, fluid-particle and vessel wall-fluid heat transfer. A series of modeling case studies including a Stirred Tank and a Conical Screw Mixer are presented and discussed. The key benefits of using the Euler-Lagrange approach over a conventional Euler-Euler framework includes reduced simulation run-times, and generality of the applied physics, without a need for extensive parameter tuning.