Measurement of fluid thermal conductivity using a micro-beam MEMS sensor

Hiroshi Takamatsu, Haidong Wang, Takanobu Fukunaga, Kosaku Kurata

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A new method for measuring thermal conductivities of gases and liquids was established by demonstrating the measurement of five kinds of liquid and air. It uses a sensor named “micro-beam sensor” that is a ∼10-μm-long free-standing platinum membrane suspended across a trench on a silicon substrate and heated in a sample by DC. This method is unique in that it is a steady-state measurement but free from the effect of natural convection owing to the micrometer size of the sensor. Improving the method for precisely determining the temperature of the sensor and modifying the device from those used in our previous feasibility study, we successfully measured the thermal conductivity ranging from ∼0.03 to ∼0.6 W/(m⋅K) within 4% error.

Original languageEnglish
Pages (from-to)30-35
Number of pages6
JournalInternational Journal of Heat and Mass Transfer
Volume117
DOIs
Publication statusPublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

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

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