Abstract #301735

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JSM 2003 Abstract #301735
Activity Number: 477
Type: Contributed
Date/Time: Thursday, August 7, 2003 : 10:30 AM to 12:20 PM
Sponsor: Section on Physical and Engineering Sciences
Abstract - #301735
Title: Predicting the Onset of Flow Instabilities Using Time Series Methods
Author(s): Carolyn B. Morgan*+ and Morris H. Morgan
Companies: Hampton University and Hampton University
Address: Queen and Tyler St., Hampton, VA, 23668,
Keywords: time series ; modeling ; regression
Abstract:

Draft tube spouted beds are engineering systems used to coat pharmaceutical particles and reduce pollutants such as nitrous oxides and sulfur oxides from industrial emission gases. One of the operating features of such systems is the emergence of instabilities generated from interactions between fluid and particles flowing under turbulent conditions. This paper shows that the bifurcations parameter alpha, appearing in a first-order nonlinear ordinary differential equation momentum exchanges leads to flow anomalies. These anomalies can be characterized statistically and related to actual engineering variables controlling system dynamics. The four primary dimensionless flow parameters inherent in the draft flow can be linked to time series expressions.

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