Abstract
The Biefeld-Brown is a fascinating effect with which levitation can be reached without moving or rotating elements. Static voltage is applied between asymmetric electrodes and a force towards the small electrode is generated. This effect is studied experimentally in this paper. Using this effect a set of experiments is conducted trying to clarify the relation of the model geometry to the induced force. The results show clear relations of the generated force to the model structure and dimensions. As the asymmetry is stronger, the force is stronger. According to the experimental results, a set of preferred parameters is given to strength the effect. Choosing the geometrical properties properly led to improvement of factor ∼9 in the generated force and efficiency. Nevertheless, some results provides contradictions to earlier models of electrohydrodynamicmic (EHD) describing the effect and reveal unresolved questions regarding this effect.
Highlights
The Biefeld-Brown effect was discovered over 80 years ago,[1] only limited number of publications were published in the scientific literature describing it
Static voltage is applied between asymmetric electrodes and a force towards the small electrode is generated
C) For bigger big electrode and smaller small electrode, higher force is obtained. d) An interesting understanding that is stemming from several experiments is that for similar potential map and changed electrode area the force is changed. e) Vibrations of the electrodes seems to reduce the effect
Summary
The Biefeld-Brown effect was discovered over 80 years ago,[1] only limited number of publications were published in the scientific literature describing it. After few failure models, the fascinating effect of levitation without any moving parts was obtained in the lab.[2] Two asymmetric electrodes fixed on balsa wood sticks, connected to a voltage power supply were levitating in a stable manner as described in details below. Another recent comprehensive work was done in NASA10 at 2009, in order to examine whether this effect could be scaled to values of interest for aircraft propulsion In this experimental study, parametric measurements were done trying to relate the generated driving force of the Biefeld-Brown effect to the structure of the model. Experienced experimentalist indicated that it is the smell of Ozone, but it was not further checked
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