Challenge Problems

NETL Challenge Problem: Small Scale Problem I



To:   All Gas-Solids Fluid Bed Computational modelers
From:   NETL
Date:   May 30, 2013
Subject:   Small Scale Challenge Problem (SSCP-I)

At the 8th International Conference on Fluidization in 1995 at Toulouse, France, the first “Challenge Problem Workshop” was organized as suggested by Prof. John Chen. Fluidization Challenge problems were proposed again in 2001 and 2011. The objective of the present challenge problem is to help the systematic validation and uncertainty quantification of computational fluid dynamic models of multiphase flows.

The Department of Energy’s (DOE) National Energy Technology Laboratory (NETL), in collaboration with a scientific advisory committee, is pleased to announce the release of a multiphase flow simulation Small Scale Challenge Problem (SSCP-I) based on experimental measurements in a 3″x9″x48″ fluidized bed. The purpose of SSCP-I is to improve the reliability of computational modeling of multiphase flows by validating with accurate and well defined experimental data.

The bed material for the experiment is Geldart group D particles of uniform size and high sphericity. The number of particles is selected so as to ensure that two fluid models, MP-PIC, and DEM simulations can be performed. Detailed information on the facility, flow conditions, and particle properties has been provided. Any missing input conditions noted by the participants will be updated.

NETL will use state-of-the-art experimental techniques, including high speed particle image velocimetry (HsPIV), and high speed pressure transducers for data acquisition. Measured Lagrangian and Eulerian particle velocity data, and statistics of pressure drop with well defined error bars will be available to participants for comparison with their simulations.

The challenge problem will enable the research community to compare multiphase models with a common set of validation data. The knowledge gained will help accelerate the development of accurate computational models of multiphase flows.

Data submissions will be accepted until September 30 2013 after which the experimental results will be released.

If you have any comments, questions or suggestions on small scale challenge problem, please send them to :

Balaji Gopalan
Research Engineer
Primary Investigator, Small Scale Challenge Problem – I
West Virginia University Research Corporation
Morgantown, WV
Phone: 304-285-4162