Fåhræus effect revisited

• Autorzy: Herczyński R.
• Języki publikacji: EN

Abstrakty

EN

A consistent hydrodynamic analysis of blood flow through capillaries is proposed. The approach, while suggested by empirical observations, is based solely on the properties of Newtonian fluids and suspensions. Blood flow is divided into three phases: the first is a thin erythrocyte-free layer near the wall, the second a core flow of constant hematocrit and the third an intermediate layer wherein the hematocrit varies. Based on the observation that viscosity depends exponentially on the local hematocrit, blood flow velocity profiles are obtained and the direct connection between the Fåhræus and the Fåhræus-Lindqvist effects is established.

Słowa kluczowe

EN

blood viscosity; hemodynamics; Fåhraeus effect; Fåhraeus–Lindqvist effect

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2016
• Tom: Vol. 68, nr 1
• Strony: 81--93
• Opis fizyczny: Bibliogr. 12 poz., rys., wykr.

Twórcy

autor

Herczyński R.

• Institute of Fundamental Technological Research Polish Academy of Sciences

Bibliografia

• 1. R. Fåhræus, The suspension stability of blood, Physiol. Rev., 9, 241–279. 1929.
• 2. J.H. Barbee, G.R. Cockelet, The Fåhræus effect, Microvascular Res., 3, 6–16, 1971.
• 3. R. Fåhræus, T. Lindqvist, The viscosity of the blood in narrow capillary tubes, Amer. J. Physiol., 96, 562–568, 1931.
• 4. A.R. Pries, D. Neuhaus, P. Gaehtgens, Blood viscosity in tube flow: dependence on diameter and hematocrit, Am. J. Physiol., 263, H1770–H1778, 1992.
• 5. H.L. Goldsmith, G.R. Cockelet, P. Gaehtgens, Robin Fåhræus: evolution of his concepts in cardiovascular physiology, Am. J. Physiol., 257, H1005–H1015, 1989.
• 6. M. Sharan, A.S. Popel, A two-phase model for flow of blood in narrow tubes with increased effective viscosity near the wall, Biorheology, 38, 415–428, 2001.
• 7. C.Y. Wang, J.B. Bassingthwaighte, Blood flow in small curved tubes, J. Biomech. Eng., 125, 910–913, 2003.
• 8. C.G. Caro, T.J. Pedley, R.C. Schroter, W.A. Seed, The Mechanics of Circulation, Oxford Univ. Press, 1979.
• 9. J.H. Barbee, The effect of temperature on the relative viscosity of human blood, Biorheology, 10, 1–5, 1973.
• 10. R.G. Cox, S.G. Mason, Suspended particles in fluid flow through tubes, Ann. Rev. Fluid Mech., 3, 1971.
• 11. T.W. Secomb, R. Skalak, N. Özkaya, J.F. Gross, Flow of axisymmetric red blood cells in narrow capillaries, J. Fluid Mech., 163, 405–423, 1986.
• 12. T.W. Secomb, A.R. Pries, Flow in microchannels and microvessel network: flexible particles (cells, vesicles) and cell-vascular wall interactions, Proceedings of the 5th World Congress of Biomechanics, Munich, 331, 2006.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.