Void fraction measurement in two-phase flow processes via symbolic dynamic filtering of ultrasonic signals

Subhadeep Chakraborty, Eric Keller, Justin Talley, Abhishek Srivastav, Asok Ray, Seungjin Kim

Research output: Contribution to journalArticle

21 Scopus citations


This communication introduces a non-intrusive method for void fraction measurement and identification of two-phase flow regimes, based on ultrasonic sensing. The underlying algorithm is built upon the recently reported theory of a statistical pattern recognition method called symbolic dynamic filtering (SDF). The results of experimental validation, generated on a laboratory test apparatus, show a one-to-one correspondence between the flow measure derived from SDF and the void fraction measured by a conductivity probe. A sharp change in the slope of flow measure is found to be in agreement with a transition from fully bubbly flow to cap-bubbly flow.

Original languageEnglish (US)
Article number023001
JournalMeasurement Science and Technology
Issue number2
StatePublished - Jan 1 2009


All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Applied Mathematics

Cite this