Simultaneous measurement of gas-liquid interface motion and temperature distribution on heated surface using temperature-sensitive paint

Yu Matsuda, Osamu Kawanami, Riki Orimo, Keigo Uete, Atsufumi Watanabe, Yasuhiro Egami, Hiroki Yamaguchi, Tomohide Niimi

Research output: Contribution to journalArticle

Abstract

We developed a simultaneous measurement technique for temperature distribution on a heated surface and gas-liquid interface motion of two-phase flows in microgap channel using temperature-sensitive paint (TSP). Since the TSP layer is optically transparent, the proposed method enables us to simultaneously measure the temperature distribution and the motion of gas-liquid interface through the TSP layer using an in-house stereoscope-like device. Since the refractive index of gas-phase differs from that of liquid-phase, the luminescent intensity of TSP in gas-phase varies from that in liquid-phase even though the temperatures are same in both phases. Then, we proposed a correction method for temperature distribution in gas-phase. To validate the proposed method, the temperature distribution measurements were conducted in liquid single-phase flow. The Nusselt numbers calculated from the measured temperatures were in good agreement with the Sieder-Tate equation. Then, we measured the temperature distributions for the boiling flows under several heated temperature conditions. The temperature distributions at growing bubble and bubble coalescence were successfully measured. TSP is useful method for investigating the temperature distribution in two-phase flows.

Original languageEnglish
Article number119567
JournalInternational Journal of Heat and Mass Transfer
Volume153
DOIs
Publication statusPublished - 2020 Jun

Keywords

  • Boiling heat transfer
  • Temperature-sensitive paint
  • Two-phase flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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