PhD Thesis (Multimedia items accompanying this thesis to be consulted at Robinson Library)This study is concerned with mass transfer to a liquid
film as it flows across the surface of a rotating disc, and
in particular with the absorption of oxygen into films of
water. The primary aim of the study was the measurement of
the distribution of oxygen concentration across the disc
radius, for a wide range of liquid flowrates, rotational
speeds, and the comparison of these distributions with
those resulting from a range of theoretical models of this
process.
These comparisons, and the observation that with flow
and rotary speeds of practical interest, the liquid films
invariably exhibit characteristic surface waves indicate
the importance of this hydrodynamic condition with respect
to the mass transfer process.
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The main dimensionless variables which are influential
in describing flow on the disc have been identified, and used
in the formulation of satisfactory mass transfer design
equation.The Robert Wood Fellowship
