Suscripción a Biblioteca: Guest

ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

MOMENTUM AND HEAT TRANSFER IN VORTICAL SHEAR FLOWS

Get access (open in a dialog) DOI: 10.1615/IHTC10.3890
pages 349-354

Sinopsis

Momentum and heat transfer solutions were applied to evaluate the development of a vortex inside a two-dimensional shear layer of an incompressible fluid.
The Poisson equation for the pressure was solved by using the Gause algorithm along y and by the fast Fourier transformation along x. For the time integration we used a Adams-Bashforth method. The staggered grid in rectangle domain was used. Average velocity and temperature profiles and disturbances was chosen as the initial conditions. Disturbances were introduced by the Rayleigh equation solutions.
General prediction relations were found for the parameters of a vortex saturation energy < es >, saturation time, development time as functions of the initial disturbance energy and dimensionless wavenumber α.
The Pr , was calculated on the basis of turbulent viscosity and turbulent conductivity and was found from 0.2 to 0.7 and related to the degree of development of the vortex. As result of the study, an original value B for the efficiency of mixing was suggested. Being similar to Pr , its application is less complex. Momentum and heat transfer differences are explained.