Molecular dynamics was used to simulate the operation of a liquid gallium electrospray thruster. Molecular dynamics calculates the motions of the ions and ion clusters of liquid gallium in a high electric field ( 1 V / nm ) after they are extracted from a platinum capillary. Liquid gallium at 320 K is simulated with a modified ion–ion potential model. The platinum capillary at 320 K is modeled using a three-zone wall model with a Langevin thermostat, and the flow rate at 30 mm / s is generated by the fluidized piston model. The insertion part of a grand canonical ensemble ( μ V T ) is adopted to supply ions of liquid gallium constantly into the platinum capillary. The electric potential and field generated by the extraction ring are solved by a combination of a finite element method and a finite difference method. The results of the simulations under several different operating conditions are used to characterize the performance of an electrospray thruster.


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    Titel :

    Molecular Dynamics Simulations of a Liquid Gallium Electrospray Thruster


    Beteiligte:
    Kim, Dae Yong (Autor:in) / Micci, Michael M. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2013-05-23


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch







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