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Hyper-Gravity and Multiple Reflections in Wave Propagation in the Aorta

[+] Author Affiliations
J. M. B. Kroot, C. G. Giannopapa

Eindhoven University of Technology, Eindhoven, The Netherlands

Paper No. PVP2010-26151, pp. 117-124; 8 pages
doi:10.1115/PVP2010-26151
From:
  • ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference
  • ASME 2010 Pressure Vessels and Piping Conference: Volume 4
  • Bellevue, Washington, USA, July 18–22, 2010
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4923-1 | eISBN: 978-0-7918-3878-5
  • Copyright © 2010 by ASME

abstract

Hypergravity and gravity changes encountered in e.g. airplanes, rollercoasters and spaceflight can result in headaches or loss of consciousness due to decreased cerebral blood flow. This paper describes the effect of hypergravity and gravity changes on the pressure in the aorta and the distension of its wall. The model presented consists of a pressure part caused by gravity and a part representing pressure waves propagating through the vessel. The total pressure is described by a one-dimensional formulation in the frequency domain. To accommodate for geometrical and material variations, the vessel is modeled as a series of sections in which multiple reflections can occur. Results are presented for constant and varying gravity in straight and tapered flexible vessels.

Copyright © 2010 by ASME

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