ANSYS Software Successfully Models Bubbling Fluidized Bed Challenge Problem
In May 2010 the National Energy Technology Laboratory (NETL) in Morgantown, West Virginia and Particulate Solid Research Inc. (PSRI), Chicago, Illinois jointly proposed a set of challenge problems for validating computational multiphase models in a set of blind benchmark tests. The primary goal of these challenges was to predict the pressure drop caused by the complex interaction between particulate and gas phases across a wide range of flow parameters in a densely packed fluidized bed reactor. A key requirement of the simulation was to account for particle size distribution.
ANSYS participated in this modeling challenge and carried out simulations using Euler-Granular (with population balance equation) and Eulerian–Lagrangian models in ANSYS FLUENT software. ANSYS FLUENT CFD software — a key part of the ANSYS suite of simulation products — has been used in modeling industrial granular flows for many years. The solver is well-known for its ability to model particulate flow accurately with a full range of documented physical models and for its extensibility by employing fully customizable user defined functions. The results from the ANSYS simulations as well as those from other participants in the challenge were discussed at a workshop at the International Conference on Circulating Fluidized Beds and Fluidization Technology (CFB10) in Bend, Oregon in May, 2011. In the tests where ANSYS FLUENT was employed, the averaged hydrostatic pressure drop was predicted within 3 percent of experimental results.