ISSN:
1573-1987
Keywords:
mixing rule
;
chemical equilibrium
;
layer formation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The formation of a stable stratification, rather than a uniformly mixed state, is shown to depend critically on the equation of state (EOS) or mixing rule for the density as a function of the solution constitution. For instance, ideal solutions can form any stable stratification at hydrostatic equilibrium, although molecular diffusion will eventually make the concentration of solute uniform. Several other types of EOS are considered at hydrostatic equilibrium, resulting in two and three layer stratifications. In the presence of convective mixing, however, the EOS serves only as a guide, since the dynamics of, for example, turbulent dispersion, significantly alter the formation of stratifications. The case of recirculating flows, however, can be simply treated and results in two layer stratifications for an EOS which is superjacent to the ideal solution. The example of stratification formation in a Burt separator is given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1001147808516
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