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.
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February 2013
Research-Article
Hypergravity and Multiple Reflections in Wave Propagation in the Aorta
C. G. Giannopapa
C. G. Giannopapa
e-mail: c.g.giannopapa@tue.nl
Department of Mathematics
and Computer Science
P.O. Box 513
5600 MB Eindhoven,
Department of Mathematics
and Computer Science
Eindhoven University of Technology
P.O. Box 513
5600 MB Eindhoven,
The Netherlands
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C. G. Giannopapa
e-mail: c.g.giannopapa@tue.nl
Department of Mathematics
and Computer Science
P.O. Box 513
5600 MB Eindhoven,
Department of Mathematics
and Computer Science
Eindhoven University of Technology
P.O. Box 513
5600 MB Eindhoven,
The Netherlands
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received December 12, 2010; final manuscript received December 12, 2011; published online November 28, 2012. Assoc. Editor: Jong Chull Jo.
J. Pressure Vessel Technol. Feb 2013, 135(1): 011301 (7 pages)
Published Online: November 28, 2012
Article history
Received:
December 12, 2010
Revision Received:
December 12, 2011
Citation
Kroot, J. M. B., and Giannopapa, C. G. (November 28, 2012). "Hypergravity and Multiple Reflections in Wave Propagation in the Aorta." ASME. J. Pressure Vessel Technol. February 2013; 135(1): 011301. https://doi.org/10.1115/1.4007187
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