High-speed visualization and image processing of sub-atmospheric water boiling on a transparent heater

Vladimir Serdyukov, Ivan Malakhov, Anton Surtaev

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The paper is devoted to the processing and analysis of the high-speed visualization data on water pool boiling in the pressure range of 5.5–103 kPa. The study of the vapor bubbles dynamics and evolution of void fraction near a heated wall during boiling was performed using a special design of a transparent heating element and high-speed visualization from its bottom side. To analyze the wide array of video data, automatic image processing programs were developed. As a result, a detailed statistical analysis of the growth curves and departure diameters of vapor bubbles during boiling at different pressures was carried out. It was shown that at ultra-low pressure 5.5 kPa after the departure of massive vapor bubbles the pulsating boiling regime was occurred. A method based on the estimation of void fraction near a heated wall was proposed and implemented for the description of this cyclic boiling regime at low sub-atmospheric pressure

Original languageEnglish
Pages (from-to)873-884
Number of pages12
JournalJournal of Visualization
Volume23
Issue number5
DOIs
Publication statusPublished - 1 Oct 2020

Keywords

  • High-speed visualization
  • Image processing
  • Sub-atmospheric boiling
  • Transparent heater design
  • Vapor bubbles evolution
  • 2-PHASE FLOW
  • VAPOR BUBBLES
  • DYNAMICS
  • VOID FRACTION

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