Bubble volume fraction using electrical capacitance tomography and high speed photography

Madhavi V. Sardeshpande, V. V. Ranade

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A two-phase flow is one of the most common flows in nature as well as in industrial applications; it covers gas-solid, liquid-liquid, solid-liquid and gas-liquid flows. Among these, the gas-liquid flows can be encountered in wide variety of industrial applications including boilers, distillation towers, chemical reactors, oil pipelines, nuclear reactors, etc. The measurement of two-phase flow parameters such as flow regime and void fraction is considerably important and plays an important role in operational safety, process control and reliability of variety of processes (Dong, F. et al., 2003). In process industries, void fraction is one of the most important parameter to characterize the hydrodynamic behavior of two phase dispersion system in a bubble column. The void fraction is a dimensionless quantity and is often termed as ?holdup or fraction? in two-phase flows. It is defined as the ratio of the volume of that phase to the total volume of the pipe (Corneliussen, S. et al., 2005) or can be defined as the fraction occupied by the gas phase in the total volume of a two or three phase mixture in a bubble column (Tang, C., 2006). Electrical Capacitance Tomography (ECT) technique is new and upcoming technology in the area of measurement of phase hold up distribution. ECT technique gives qualitative data for phase hold up distribution not the quantitative information. Therefore, it was thought desirable to validate this new technique with conventional photography technique for void fraction measurement. Therefore, an attempt was made here to design and construct an experimental test rig of laboratory scale bubble column for two-phase air-water bubble flow by using in-house facilities. This laboratory scale equipment is used to generate the phenomenon of void fraction in an ECT sensor (i.e. co-current bubble column) and its subsequent measurements. Series of experiments will be performed for the analysis of physical parameters of two-phase flow.

Original languageEnglish
Title of host publicationParticle Technology Forum 2013 - Core Programming Area at the 2013 AIChE Annual Meeting: Global Challenges for Engineering a Sustainable Future
PublisherAIChE
Pages266-268
Number of pages3
ISBN (Print)9781634390507
Publication statusPublished - 2013
Externally publishedYes
EventParticle Technology Forum 2013 - Core Programming Area at the 2013 AIChE Annual Meeting: Global Challenges for Engineering a Sustainable Future - San Francisco, United States
Duration: 03 Nov 201308 Nov 2013

Conference

ConferenceParticle Technology Forum 2013 - Core Programming Area at the 2013 AIChE Annual Meeting: Global Challenges for Engineering a Sustainable Future
CountryUnited States
CitySan Francisco
Period03/11/201308/11/2013

ASJC Scopus subject areas

  • Engineering(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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