1. Electrostatics and High Voltage Research Unit, IRECOM, University Djillali Liabes, Sidi Bel Abbes, Algeria
2. APELEC Research Unit, IRECOM, University Djillali Liabes, Sidi Bel Abbes, Algeria
3. Electrostatics of Dispersed Media Research Unit, PPRIME Institute, University of Poitiers-ENSMA, Angoulême, France