
%0 Journal Article
%A Sahoo, Goloka Behari 
%A Luketina, David 
%T Bubbler design for reservoir destratification
%J Marine and Freshwater Research
%D 2003/06/20
%V 54
%N 3
%P 271-285
%K gas transfer, mechanical efficiency, thermal stratification, water quality.
%R https://doi.org/10.1071/MF02045
%U https://www.publish.csiro.au/paper/MF02045 
%X Two important bubbler-performance criteria, the mechanical efficiency, &#951;mech, and the destratification time, &#915;, were analysed as functions of two dimensionless parameters, G, the strength of stratification, and M, the source strength. Equations to estimate the optimum airflow rate (via M) and corresponding &#951;mech and &#915; for a known linear stratification G in a reservoir were derived. Owing to difficulties in accurately determining the actual G, it was demonstrated that it is appropriate practice to reduce the design G value by around 10%. It was shown that the equivalent linear stratification method might lead to sub-optimal design for stratification profiles that deviate substantially from a linear profile. Rather, a bubble-plume model should be applied. Finally, the effects of incorporating changes in bubble radius in a bubble-plume model were examined. &#951;mech and &#915; were found to be relatively insensitive to bubble radius; however, the ideal bubble size for maintaining a suitable oxygen dissolution efficiency is 1 mm. 
