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

J. Seki, K. Hayashi, T. Nakamura, Mitsuo 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: FLUID 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 (Print)0 08 031681 6
Publication statusPublished - 1986
Externally publishedYes

Fingerprint

Heart valve prostheses
Anemometers
Turbulent flow
Lasers
Pulsatile flow
Frequency response
Sampling

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Seki, J., Hayashi, K., Nakamura, T., & Umezu, M. (1986). Laser-Doppler and hot-film anemometers for measurement of unsteady turbulent flow behind a prosthetic heart valve. In IN: FLUID CONTROL AND MEASUREMENT, (TOKYO, JAPAN: SEP. 2-6, 1985), M. HARADA (ED.) (Vol. 1 , Oxford, U.K., Pergamon Press, 1986, p.269-274.). Pergamon Press.

Laser-Doppler and hot-film anemometers for measurement of unsteady turbulent flow behind a prosthetic heart valve. / Seki, J.; Hayashi, K.; Nakamura, T.; Umezu, Mitsuo.

IN: FLUID CONTROL AND MEASUREMENT, (TOKYO, JAPAN: SEP. 2-6, 1985), M. HARADA (ED.). Vol. 1 , Oxford, U.K., Pergamon Press, 1986, p.269-274. Pergamon Press, 1986.

Research output: Chapter in Book/Report/Conference proceedingChapter

Seki, J, Hayashi, K, Nakamura, T & Umezu, M 1986, Laser-Doppler and hot-film anemometers for measurement of unsteady turbulent flow behind a prosthetic heart valve. in IN: FLUID CONTROL AND MEASUREMENT, (TOKYO, JAPAN: SEP. 2-6, 1985), M. HARADA (ED.). vol. 1 , Oxford, U.K., Pergamon Press, 1986, p.269-274., Pergamon Press.
Seki J, Hayashi K, Nakamura T, Umezu M. Laser-Doppler and hot-film anemometers for measurement of unsteady turbulent flow behind a prosthetic heart valve. In IN: FLUID CONTROL AND MEASUREMENT, (TOKYO, JAPAN: SEP. 2-6, 1985), M. HARADA (ED.). Vol. 1 , Oxford, U.K., Pergamon Press, 1986, p.269-274. Pergamon Press. 1986
Seki, J. ; Hayashi, K. ; Nakamura, T. ; Umezu, Mitsuo. / Laser-Doppler and hot-film anemometers for measurement of unsteady turbulent flow behind a prosthetic heart valve. IN: FLUID CONTROL AND MEASUREMENT, (TOKYO, JAPAN: SEP. 2-6, 1985), M. HARADA (ED.). Vol. 1 , Oxford, U.K., Pergamon Press, 1986, p.269-274. Pergamon Press, 1986.
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AB - 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)

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