Fluid Suspended Films in Present of Electric Field and Voltage

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Shirsavar, Reza | 2012

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Type of Document: Ph.D. Dissertation
Language: Farsi
Document No: 44911 (04)
University: Sharif University of Technology
Department: Physic
Advisor(s): Amjadi, Ahmad; Ejtehadi, Mohammad Reza
Abstract:
Scientists want to know how they can control fluids motion. They use electric fields for controlling the fluids in different dimensions. In small size, application of electric fields is very important because of biological applications. We use electric current and field for rotating freely suspended films. Here, we study soap, polar and non-polar liquids, MBBA liquid crystal and ferrofluids films. We show that the surface charge plays the crucial role in rotating the films.We study the correlation between rotation of a film and different physical quantities.Our experiments confirm that dipole moments of fluid molecules do not show a clear effect on the rotation. Increasing the dipole moment increases the electrical conductivity and causes the rotation
Keywords:
Freely Suspended Film ; Fluid Hydrodynamics ; Electrical Conductivity ; Electrical Dipole

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