Sieve plates Peclet number

A Peclet number of zero indicates perfect mixing and a value of oo indicates plug flow. For bubble-cap and sieve plates the eddy diffusivity can be estimated from the equation ... [Pg.555]

For distillation at atmospheric pressure in a column 0.3 m (1 ft) in diameter the Peclet number is about 10, based on empirical correlations for dispersion on bubble-cap and sieve trays. This is in the range where significant enhancement of the efficiency should result because of gradients on the plate. For a column 1 m or larger in diameter, the Peclet number would be expected to be greater than 20,... [Pg.570]

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