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Unsteady axial mixing by natural convection in a vertical column
Author(s) -
Baird M. H. I.,
Aravamudan K.,
Rao N. V. Rama,
Chadam J.,
Peirce A. P.
Publication year - 1992
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690381113
Subject(s) - baffle , brine , laminar flow , mixing (physics) , mechanics , turbulence , aqueous solution , chemistry , stratification (seeds) , tube (container) , sodium , materials science , thermodynamics , physics , composite material , quantum mechanics , seed dormancy , germination , botany , organic chemistry , dormancy , biology
Unsteady axial mixing due to addition of a batch of sodium chloride solution at the top of a water‐filled tube (2.63 cm i.d.) has been studied by measuring the developing concentration profile and the advancing front with dye added to the brine. Data have also been obtained with added baffle plates, with the use of a viscous aqueous solution, and in smaller diameter (1.48, 1.91 cm) tubes. Results can be approximately correlated by means of a model based on unsteady one‐dimensional turbulent dispersion. Laminar flow affects the behavior of the advancing front at which the salt concentration is lowest.