Results 251 to 260 of about 43,354 (300)
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The Bulletin of Mathematical Biophysics, 1972
This paper deals with a mathematical attempt to determine the wall shear during normal flow of blood in the ascending and the descending thoracic aorta. A simple model is used, but the results obtained are in agreement with published experimental results for the descending thoracic aorta.
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This paper deals with a mathematical attempt to determine the wall shear during normal flow of blood in the ascending and the descending thoracic aorta. A simple model is used, but the results obtained are in agreement with published experimental results for the descending thoracic aorta.
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Perfusion cooling by pulsatile flow
The Japanese Journal of Surgery, 1977Organ temperature changes and the temperature gradient between organs with cooling and rewarming were studied in rabbits using pulsatile flow perfusion. The temperature gradient between organs was within 3 degrees C. At the initial stage of cooling and rewarming, organ temperatures changed rapidly.
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Pulsatile flow in a catheterised artery
Journal of Biomechanics, 1986A model is presented for the physiological problem of a catheter which is inserted in a femoral artery to measure the pressure gradient. As the catheter will modify the pressure distribution in the artery, the pressure gradient which would be recorded by a perfect pressure transducer attached to it would differ from that in the uncatheterised artery ...
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Pulsatile Flow in a Constricted Channel
Journal of Biomechanical Engineering, 1992A nonuniform channel is used as a simple model of a constricted arterial vessel. Flow patterns have been calculated for pulsatile flow with both sinusoidal and nonsinusoidal flow rates for a range of Reynolds number, Re, and Strouhal number, St. The results show that even for relatively low frequency flows a strong vortex wave will be generated with a ...
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A flow facility for the characterization of pulsatile flows
Flow Measurement and Instrumentation, 2012This thesis deals with flow measuring techniques applied to steady and pulsating gas flows relevant to gas exchange systems for internal combustion engines. Gas flows in such environments are complex, i.e. they are inhomogeneous, three-dimensional, unsteady, non-isothermal and exhibit significant density changes.
Fredrik Laurantzon +3 more
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2019
Flow solutions in the presence of pulsation (e.g. from the heart) are developed. Bessel functions are introduced as an aside. The concepts of shocks and solitary waves (solitons) are then discussed as examples of nonlinear effects. The strategy for dealing with intrinsic nonlinearity is described in terms of mode coupling and the Korteweg–de Vries (KdV)
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Flow solutions in the presence of pulsation (e.g. from the heart) are developed. Bessel functions are introduced as an aside. The concepts of shocks and solitary waves (solitons) are then discussed as examples of nonlinear effects. The strategy for dealing with intrinsic nonlinearity is described in terms of mode coupling and the Korteweg–de Vries (KdV)
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Archives of Internal Medicine, 1965
This volume presents the proceedings of the First International Symposium on Pulsatile Blood Flow, held at the Presbyterian Hospital, Philadelphia, in April, 1963. It reports a multidisciplinary approach to arterial hemodynamics and includes as participants not only physicians, but biophysicists, mathematicians, physiologists and engineers.
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This volume presents the proceedings of the First International Symposium on Pulsatile Blood Flow, held at the Presbyterian Hospital, Philadelphia, in April, 1963. It reports a multidisciplinary approach to arterial hemodynamics and includes as participants not only physicians, but biophysicists, mathematicians, physiologists and engineers.
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1969
Recent interest in the hydrodynamic events relating to biomedical problems of the arteries as well as the development of artificial heart-assist devices have prompted one to study the nature of pulsatile flows in arteries. In particular, the problem of atherosclerosis is suspected to be related to the shearing stress developed over the vascular wall ...
S. C. Ling, H. B. Atabek, J. J. Carmody
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Recent interest in the hydrodynamic events relating to biomedical problems of the arteries as well as the development of artificial heart-assist devices have prompted one to study the nature of pulsatile flows in arteries. In particular, the problem of atherosclerosis is suspected to be related to the shearing stress developed over the vascular wall ...
S. C. Ling, H. B. Atabek, J. J. Carmody
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A Turbulence Model for Pulsatile Arterial Flows
Journal of Biomechanical Engineering, 2004Difficulties in predicting the behavior of some high Reynolds number flows in the circulatory system stem in part from the severe requirements placed on the turbulence model chosen to close the time-averaged equations of fluid motion. In particular, the successful turbulence model is required to (a) correctly capture the “nonequilibrium” effects ...
B A, Younis, S A, Berger
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The Use of Pulsatile Flow to Separate Species
Annals of the New York Academy of Sciences, 2002Abstract: Pulsatile motion greatly enhances the mass transfer of a dilute species compared to that due to pure molecular diffusion. If two dilute species are present in a carrier, the mass transfer of the faster diffusing species may be higher, lower, or the same as the slower diffusing species.
Aaron M, Thomas, R, Narayanan
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