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 proceedingConference contribution

Abstract

Temporal and spatial resolutions of hot-film anemometer (CTA) and laser-Doppler anemometer (LDA) were studied on the unsteady turbulent flow generated behind a prosthetic heart valve under pulsatile flow condition. Frequency response was lower in the LDA measurements (approximately 1 kHz) than in the CTA ones (approximately 6 kHz). Although the calculated dimensions of the LDA 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 CTA measurement was influenced by the partial blockage of flow caused by the CTA probe.

Original languageEnglish
Title of host publicationUnknown Host Publication Title
Place of PublicationOxford, Engl
PublisherPergamon Press
Pages149-154
Number of pages6
Publication statusPublished - 1985
Externally publishedYes

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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. (1985). LASER-DOPPLER AND HOT-FILM ANEMOMETERS FOR MEASUREMENT OF UNSTEADY TURBULENT FLOW BEHIND A PROSTHETIC HEART VALVE. In Unknown Host Publication Title (pp. 149-154). Oxford, Engl: 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.

Unknown Host Publication Title. Oxford, Engl : Pergamon Press, 1985. p. 149-154.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Seki, J, Hayashi, K, Nakamura, T & Umezu, M 1985, LASER-DOPPLER AND HOT-FILM ANEMOMETERS FOR MEASUREMENT OF UNSTEADY TURBULENT FLOW BEHIND A PROSTHETIC HEART VALVE. in Unknown Host Publication Title. Pergamon Press, Oxford, Engl, pp. 149-154.
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 Unknown Host Publication Title. Oxford, Engl: Pergamon Press. 1985. p. 149-154
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. Unknown Host Publication Title. Oxford, Engl : Pergamon Press, 1985. pp. 149-154
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