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Modeling Average Pressure and Volume Fraction of a Fluidized Bed Using Data-Driven Smart Proxy

1
Petroleum & Natural Gas Engineering Department, West Virginia University, Morgantown, WV 26506-6070, USA
2
National Energy Technology Laboratory, Department of Energy, Morgantown, WV 26505, USA
3
West Virginia Research Corporation, Morgantown, WV 26506, USA
*
Author to whom correspondence should be addressed.
Fluids 2019, 4(3), 123; https://doi.org/10.3390/fluids4030123
Received: 15 April 2019 / Revised: 28 June 2019 / Accepted: 1 July 2019 / Published: 5 July 2019

Abstract

Simulations can reduce the time and cost to develop and deploy advanced technologies and enable their rapid scale-up for fossil fuel-based energy systems. However, to ensure their usefulness in practice, the credibility of the simulations needs to be established with uncertainty quantification (UQ) methods. The National Energy Technology Laboratory (NETL) has been applying non-intrusive UQ methodologies to categorize and quantify uncertainties in computational fluid dynamics (CFD) simulations of gas-solid multiphase flows. To reduce the computational cost associated with gas-solid flow simulations required for UQ analysis, techniques commonly used in the area of artificial intelligence (AI) and data mining are used to construct smart proxy models, which can reduce the computational cost of conducting large numbers of multiphase CFD simulations. The feasibility of using AI and machine learning to construct a smart proxy for a gas-solid multiphase flow has been investigated by looking at the flow and particle behavior in a non-reacting rectangular fluidized bed. The NETL’s in house multiphase solver, Multiphase Flow with Interphase eXchanges (MFiX), was used to generate simulation data for the rectangular fluidized bed. The artificial neural network (ANN) was used to construct a CFD smart proxy, which is able to reproduce the CFD results with reasonable error (about 10%). Several blind cases were used to validate this technology. The results show a good agreement with CFD runs while the approach is less computationally expensive. The developed model can be used to generate the time averaged results of any given fluidized bed with the same geometry with different inlet velocity in couple of minutes. View Full-Text
Keywords: fluidized bed; computational fluid dynamic; uncertainty quantification; machine learning; artificial neural network; data-driven smart proxy fluidized bed; computational fluid dynamic; uncertainty quantification; machine learning; artificial neural network; data-driven smart proxy
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Ansari, A.; Mohaghegh, S.D.; Shahnam, M.; Dietiker, J.-F. Modeling Average Pressure and Volume Fraction of a Fluidized Bed Using Data-Driven Smart Proxy. Fluids 2019, 4, 123.

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