Wave propagation in physiological collapsible tubes and a proposal for a Shapiro number |
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| Institution: | 1. Dipartimento di Ingegneria – Università di Bergamo, Viale Marconi 5, 24044 Dalmine, BG, Italy;2. Dipartimento di Ingegneria Elettrica, Gestionale e Meccanica – Università di Udine, Via delle Scienze 208, 33100 Udine, Italy;1. Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;2. Thermal Control Group, Space Division, Netherlands Aerospace Centre, 8316 PR Marknesse, The Netherlands;1. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia;2. CONACYT-CINVESTAV del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe 25900, Mexico;3. Grupo de Materia Condensada-UdeA, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia;4. Centro de Investigación en Ciencias-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209 Cuernavaca, Morelos, Mexico |
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| Abstract: | In this Brief Communication, a few introductory comments are made first, regarding wave propagation in collapsible tubes and flow limitation, as well as what is commonly referred to as the “speed index”, namely the ratio of the flow velocity in the collapsible tube divided by the wave-propagation velocity. It is then proposed that it is fitting for this speed index to be henceforth named as the Shapiro number. |
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