Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 15 (1977), S. 98-105 
    ISSN: 1741-0444
    Keywords: Carbon dioxide ; Oxygen ; Diffusion ; Blood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire Dans le présent article, les solutions numériques des équations de diffusion ont été obtenues pour des cas de diffusion de l’oxygène et du bioxyde de carbone dans le sang s’écoulant entre deux surfaces poreuses parallèles. On suppose qu’à l’entrée du canal, les profils de concentration sont uniformes et que le profil de vitesse est totalement développé. Les caractéristiques rhéologiques du sang sont décrites par l’équation de Casson. Les calculs sont réalisés en employant la procédure de la différence explicite finie. Les résultats ont été obtenus pour une large gamme de chiffres de rendement, de tensions d’entrée partielles, de niveaux d’acidité (pH), de résistances des membranes et de concentrations en hémoglobine.
    Abstract: Zusammenfassung In der vorliegenden Arbeit wurden die numerischen Lösungen von Diffusionsgleichungen für die Fälle von Sauerstoff und Kohlendioxid erhalten, die durch Blut diffundieren, das zwischen zwei porösen parallelen Ebenen fließt. Es wird angenommen, daß am Eingang zum Kanal die Konzentrationsprofile gleichförmig sind und das Geschwindigkeitsprofil voll entwickelt ist. Die rheologischen Eigenschaften von Blut werden durch die Casson’s sche Gleichung bescrieben. Die Berechnungen werden mit Hilfe des Vorwärtsschrittsverfahrens der expliziten endlichen Differenz durchgeführt. Die Resultate wurden für einen weiten Bereich von Ertragszahlen, Teileingangsdrucken, pH-Zahlen, Membranwiderständen und Hämoglobinkonzentrationen erhalten.
    Notes: Abstract The numerical solutions of diffusion equations have been obtained for the cases of oxygen and carbon dioxide diffusing through blood flowing between two porous parallel planes. It is assumed that at the entrance to the channel the concentration profiles are uniform and the velocity profile is fully developed. The rheological characteristics of blood are described by the Casson equation. The computations have been made employing the explicit finite-difference forward-marching procedure. The results have been obtained for a wide range of yield numbers, inlet partial pressures, pH, membrane resistances and haemoglobin concentrations.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 15 (1992), S. 1313-1332 
    ISSN: 0271-2091
    Keywords: A fourth-order method ; Navier-Stokes equation ; Stability ; Finite difference ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A fourth-order method, without using extrapolation, is developed for the steady-state solution of a non-linear system of three simultaneous partial differential equations for the flow of a fluid in a heated closed cavity. The method is a finite difference method which has converged for all Rayleigh numbers Ra of physical interest and all Prandtl numbers Pr attempted. The results are presented and compared with some of the accurate results available in de Vahl Davis and Jones, Shay and Schultz, and Dennis and Hudson. The method used to develop the fourth-order method presented in this paper can be used to develop high-order methods for other partial differential equations. The method was developed to be stable without using the upwinding technique.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...