Kumar Bimlesh, Rao Achanta Ramakrishna
Department of Civil Engineering, Indian Institute of Science, Bangalore 560 012, India.
Bioresour Technol. 2009 Jun;100(11):2886-8. doi: 10.1016/j.biortech.2008.12.031. Epub 2009 Feb 13.
The dissipation rate of turbulent kinetic energy (epsilon) is a key parameter for mixing in surface aerators. In particular, determination epsilon across the impeller stream, where the most intensive mixing takes place, is essential to ascertain that an appropriate degree of mixing is achieved. Present work by using commercial software VisiMix calculates the energy dissipation rate in geometrically similar unbaffled surface aeration systems in order to scale-up the oxygen transfer process. It is found that in geometrically similar system, oxygen transfer rate is uniquely correlated with dissipation rate of energy. Simulation or scale-up equation governing oxygen transfer rate and dissipation rate of energy has been developed in the present work.
