Author/Authors :
S. H. Mousavi School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran , M. Shariaty Niassar School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran , M. Ghadiri Institute of Particle Science and Engineering,University of Leeds, UK , M.A. Moosavian School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran , H. Bahmanyar School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran , M. Buckley Institute of Particle Science and Engineering,University of Leeds, UK
چكيده لاتين :
The coalescence of water drops in oils may be enhanced by the application of an electric field. However, the process of coalescence could cause secondary drop formation, a feature which is undesirable as it reduces the efficiency of water separation. In this work the effect of pulsed electric field is evaluated. With pulsatile electric fields higher field strengths can be applied for systems having a high water content without causing field breakdown. Three waveform types, i.e. square, sinusoidal and sawtooth waves have been applied to drop-interface coalescence and their effect analysed. It is shown that the sinusoidal and sawtooth waveforms are most effective in reducing the secondary droplets formation.
