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- W1762325213 abstract "Charge to mass ratio is a critical parameter that needs to be determined in order to accurately predict behaviour of a charged particle exposed to electrical forces. In this thesis, a new method for estimating the q/m ratio in electrically assisted atomization of highly conductive liquids is presented and the value of the radius exponent in the charge to radius dependency for the conductive particles atomized in an electric field is established. It is found that the particle charge to radius dependency is quadratic when the particle is in direct contact with the electrified material and becomes almost linear when the distance between the particle and the atomized material is increased. Also, it was found that liquid particle charge increases linearly with the increasing of the ligament length. The estimate was incorporated into a numerical simulation of the industrial electrostatic coating process. Commercial software FLUENT was used to model both the continuous phase and the discrete phase of a typical industrial coating process. A full three-dimensional model was considered and the electric phenomena were added to the existing CFD model. Modeling of the electric field with space charge, corona current and the electro-hydro-dynamic flow were thoroughly explained. The average charge to mass ratio and the distribution of the charge to mass ratio in the particle population were systematically varied to demonstrate their effects on the motion and deposition of the charged particles. The numerical results show that the transfer efficiency increases as the Q/M increases which can be explained by the increased value of the electrostatic forces between the particles and the target. The charged cloud expands because of the mutual repulsion of the charged particles and this makes the particles distribute more uniformly on the target surface. Keywords: charge, charge to mass ratio, conduction charging, electrostatic coating, numerical modeling" @default.
- W1762325213 created "2016-06-24" @default.
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- W1762325213 date "2010-01-01" @default.
- W1762325213 modified "2023-09-27" @default.
- W1762325213 title "Estimation of charge to mass ratio distribution in particles charged by conduction" @default.
- W1762325213 hasPublicationYear "2010" @default.
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