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  • FLUID MECHANICS AND HEAT TRANSFER  (2)
  • Gibbs energy of activation  (1)
  • Key words: Business process modelling – Business process re-engineering – Human factors – Information systems – Success  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Business Process Re-engineering (BPR): The REBUS Approach (2000)
    Springer
    Cognition, technology & work 2 (2000), S. 89-96 
    Details
    ISSN: 1435-5566
    Keywords: Key words: Business process modelling – Business process re-engineering – Human factors – Information systems – Success
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract: Many organisations undertake business process re-engineering (BPR) projects in order to improve efficiency and reduce costs. Although this approach can result in significant improvements and benefits, there are high risks associated with radical changes of business processes and the failure rate of BPR projects is reported to be as high as 70%. The Centre for Re-engineering Business Processes (REBUS) was established at Brunel University to provide a multidisciplinary environment for research into BPR and its success factors. This paper describes the REBUS approach to research concerning the success of BPR projects and presents examples of some of the projects carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101110050030
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Viscosities of Nonelectrolyte Liquid Mixtures Containing Acrylonitrile (2000)
    Springer
    International journal of thermophysics 21 (2000), S. 999-1010 
    Details
    ISSN: 1572-9567
    Keywords: acrylonitrile ; alkyl acetate ; binary liquid mixtures ; correlating equations ; dimethylformamide ; dimethylacetamide ; dimethyl sulphoxide ; Gibbs energy of activation ; molecular interactions ; viscosities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The measurements of viscosity η are reported for seven binary mixtures of acrylonitrile (AN) with ethanenitrile (EN), methyl acetate (MA), ethyl acetate (EA), n-butyl acetate (BA), dimethylformamide (DMF), dimethylacetamide (DMA), and dimethyl sulphoxide (DMSO) at 303.15 K temperature. The viscosity data have been correlated with the equations of Grunberg and Nissan; Hind, McLaughlin, and Ubbelohde; Tamura and Kurata; Katti and Chaudhri; McAllister; Heric and Brewer; and of Auslaender. The relations between the viscosity deviations Δη, excess Gibbs energy of activation ΔG*E of viscous flow, and the intermolecular interaction in these mixtures are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026485618495
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    Paper (German National Licenses)
    Fulltext
  • 3
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    A fully vectorized numerical solution of the incompressible Navier-Stokes equations (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A vectorizable algorithm is presented for the implicit finite difference solution of the incompressible Navier-Stokes equations in general curvilinear coordinates. The unsteady Reynolds averaged Navier-Stokes equations solved are in two dimension and non-conservative primitive variable form. A two-layer algebraic eddy viscosity turbulence model is used to incorporate the effects of turbulence. Two momentum equations and a Poisson pressure equation, which is obtained by taking the divergence of the momentum equations and satisfying the continuity equation, are solved simultaneously at each time step. An elliptic grid generation approach is used to generate a boundary conforming coordinate system about an airfoil. The governing equations are expressed in terms of the curvilinear coordinates and are solved on a uniform rectangular computational domain. A checkerboard SOR, which can effectively utilize the computer architectural concept of vector processing, is used for iterative solution of the governing equations.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: NASA-CR-174496 , NAS 1.26:174496
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    A vectorized solution for incompressible flow (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: An algorithm is developed to obtain solutions to the unsteady Reynolds-averaged incompressible Navier-Stokes equations in general curvilinear coordinates on a vector processor. The governing equations are in nonconservative form with the velocity and pressure as dependent variables. Two momentum equations and the Poisson equation for pressure form a set of three governing equations for three flow field unknowns: u, v, and p. The governing equations and boundary conditions are expressed in terms of boundary-conforming curvilinear coordinates, and a checkerboard SOR iteration is used to solve the governing equations. Several possible sequences for a checkerboard SOR iteration are investigated for finding the best overall convergence rate. The efficiency and capability of the present algorithm was assessed using the example of an 18 percent thick NACA 66(3)018 airfoil at zero degree angle of attack for chord Reynolds number range 1000-40,000.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA PAPER 84-1534
    Format: text
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    NASA TECHNICAL REPORTS
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