INVESTIGATION OF THE STRUCTURE OF 2-PHASE FLOW MODEL-MEDIA IN BUBBLE-COLUMN BIOREACTORS .2. TRANSVERSE VARIATION OF LOCAL PROPERTIES WHEN COALESCENCE-SUPPRESSING MEDIA ARE USED

By applying photographic, electrical conductivity, and electrooptical methods, the transverse variation of bubble size and velocity, the local gas hold up, and the local specific gas/liquid interfacial area were estimated in a bench scale bubble-column bioreactor containing model cultivation media. The liquid velocity profile, the transverse turbulence intensity variations, and the turbulence energy dissipation scale were also measured by a hot film turbulence probe and constant temperature anemometer technique. A significant relationship was found between the two-phase flow fluid dynamical state and the transverse variation of the various properties. © 1979 Springer-Verlag.