Towards a theoretical model of heat transfer for hot-wire anemometry close to solid walls

Yuta Ikeya, Ramis Örlü, Koji Fukagata, P. Henrik Alfredsson

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Hot-wire anemometry readings where the sensor is close to a solid wall become erroneous due to additional heat losses to the wall. Here we examine this effect by means of experiments and numerical simulations. Measurements in both quiescent air as well as laminar and turbulent boundary layers confirmed the influences of parameters such as wall conductivity, overheat ratio and probe dimensions on the hot-wire output voltage. Compared to previous studies, the focus lies not only on the streamwise mean velocity, but also on its fluctuations. The accompanying two-dimensional steady numerical simulation allowed a qualitative discussion of the problem and furthermore mapped the temperature field around the wire for different wall materials. Based on these experimental and numerical results, a theoretical model of the heat transfer from a heated wire close to a solid wall is proposed that accounts for the contributions from both convection and conduction.

本文言語English
ページ(範囲)248-256
ページ数9
ジャーナルInternational Journal of Heat and Fluid Flow
68
DOI
出版ステータスPublished - 2017 12

ASJC Scopus subject areas

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

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