Fabrication of calibration-free temperature sensitive hollow micro capsules for quantitative flow visualization

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630058
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: SOMEYA Satoshi 独立行政法人産業技術総合研究所, エネルギー技術研究部門, 上級主任研究員 (00357336)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 可視化 / 蛍光 / マイクロカプセル

Outline of Final Research Achievements

We fabricated temperature sensitive hollow micro capsules, applicable to the flow of water, oil or other liquid medium. The capsules were made from a polylactic acid and fluorescence materials of which intensity depended on the temperature. The diameter of capsules were from 0.5 to 1.0 micro meters. We investigated optical properties of capsules and applied capsules to the visualization of temperature field of the flow in a heat-exchanger.
We measured emission spectra, temperature sensitivity, oxygen sensitivity and photo-deterioration of several ten kinds of capsules with different fluorescence materials. In addition, simultaneous measurement of temperature and velocity field was demonstrated in the flow inside of a heat exchanger with small ribs.

Free Research Field

熱流動，流体計測