Molecular dynamics simulations of a liquid gallium electrospray thruster

Dae Yong Kim, Michael M. Micci

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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 320Kis 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 (μVT) 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.

Original languageEnglish (US)
Pages (from-to)899-905
Number of pages7
JournalJournal of Propulsion and Power
Volume29
Issue number4
DOIs
StatePublished - Jul 1 2013

Fingerprint

gallium
Gallium
Molecular dynamics
molecular dynamics
liquid
platinum
ion
Computer simulation
Ions
Liquids
liquids
Platinum
simulation
ions
Electric fields
Thermostats
thermostats
electric fields
finite difference method
pistons

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Fuel Technology
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

@article{36f7e400db8c4266a5a71dc2d029be8c,
title = "Molecular dynamics simulations of a liquid gallium electrospray thruster",
abstract = "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 320Kis 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 (μVT) 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.",
author = "Kim, {Dae Yong} and Micci, {Michael M.}",
year = "2013",
month = "7",
day = "1",
doi = "10.2514/1.B34501",
language = "English (US)",
volume = "29",
pages = "899--905",
journal = "Journal of Propulsion and Power",
issn = "0748-4658",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
number = "4",

}

Molecular dynamics simulations of a liquid gallium electrospray thruster. / Kim, Dae Yong; Micci, Michael M.

In: Journal of Propulsion and Power, Vol. 29, No. 4, 01.07.2013, p. 899-905.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Molecular dynamics simulations of a liquid gallium electrospray thruster

AU - Kim, Dae Yong

AU - Micci, Michael M.

PY - 2013/7/1

Y1 - 2013/7/1

N2 - 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 320Kis 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 (μVT) 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.

AB - 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 320Kis 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 (μVT) 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.

UR - http://www.scopus.com/inward/record.url?scp=84880562345&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880562345&partnerID=8YFLogxK

U2 - 10.2514/1.B34501

DO - 10.2514/1.B34501

M3 - Article

AN - SCOPUS:84880562345

VL - 29

SP - 899

EP - 905

JO - Journal of Propulsion and Power

JF - Journal of Propulsion and Power

SN - 0748-4658

IS - 4

ER -