A New Statistical Parameter for Identifying the Main Transition Velocities in Bubble Columns*

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

The identification of the main flow regime boundaries in bubble columns is essential since the degrees of mixing and mass and heat transfer vary with the flow regime. In this work, a new statistical parameter was extracted from the time series of the cross-sectional averaged gas holdup. The measurements were performed in bubble columns by means of conductivity wire-mesh sensors at very high sampling frequency. The columns were operated with an air/deionized water system under ambient conditions. As a flow regime indicator, a new dimensionless statistical parameter called "relative maximum number of visits in a region" was introduced. This new parameter is a function of the difference between the maximum numbers of visits in a region, calculated from two different division schemes of the signal range.

Details

OriginalspracheEnglisch
Seiten (von - bis)1940-1946
Seitenumfang7
FachzeitschriftChemical Engineering and Technology
Jahrgang38
Ausgabenummer11
PublikationsstatusVeröffentlicht - 1 Nov. 2015
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • Bubble columns, Conductivity wire-mesh sensor, Flow regime identification, Gas holdup, Hydrodynamics