Flow Regime Identification in a Bubble Column Based on both Kolmogorov Entropy and Quality of Mixedness Derived from CAERPT Data

✍ Scribed by Stoyan Nedeltchev; Sailesh B. Kumar; Milorad P. Dudukovic

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 543 KB
• Volume: 81
• Category: Article
• ISSN: 0008-4034
• DOI: 10.1002/cjce.5450810305

✦ Synopsis

Abstract

Computer‐automated radioactive particle tracking (CARPT) data obtained in a 0.162 m air‐water bubble column operated at ambient pressure have been analysed. The superficial gas velocity (U~g~) has been varied in the range 0.02‐0.12 m/s under constant liquid height 1.04 m. A perforated plate (82 holes ø 0.4 mm, free plate area 0.05 %) distributor has been used. The Kolmogorov entropy (KE) vs. U~g~ allows identification of the transition velocity (U~trans~ = 0.064 m/s) between bubbly and transition regimes. KE models for both regimes have been also developed. The quality of mixedness (QM) concept shows that QM(upper zone) ⊕ QM(lower zone) at U~trans~ = 0.064 m/s.