Laser-Doppler and hot-film anemometers for measurement of unsteady turbulent flow behind a prosthetic heart valve.

J. Seki, K. Hayashi, T. Nakamura, M. Umezu

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Temporal and spatial resolutions of a hot film anemometer (CTA) and a laser Doppler anemometer (LDA) were studied on the unsteady turbulent flow generated behind a prosthetic heart valve under a pulsatile flow condition. Frequency response was lower in the laser Doppler anemometer measurements ( 1 kHz) than in the hot film anemometer ( 6 kHz). Although the calculated dimensions of the laser Doppler anemometer sampling volume were 0.06 mm in diameter and 0.4 mm in length, the actual dimensions were estimated to be about 0.3 mm and 1 mm, respectively. The hot film anemometer measurement was influenced by the partial blockage of flow caused by the hot film anemometer probe. (A)

Original languageEnglish
Title of host publicationIN
Subtitle of host publicationFLUID CONTROL AND MEASUREMENT, (TOKYO, JAPAN: SEP. 2-6, 1985), M. HARADA (ED.)
PublisherPergamon Press
Volume1 , Oxford, U.K., Pergamon Press, 1986, p.269-274. (ISBN 0-08-031681-6)
ISBN (Print)0080316816, 9780080316819
Publication statusPublished - 1986 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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