Next Article in Journal
Modeling Plasma via Electron Impact Ionization
Next Article in Special Issue
Mathematical Modeling of Liquid-fed Pulsed Plasma Thruster
Previous Article in Journal
Winglet Geometry Impact on DLR-F4 Aerodynamics and an Analysis of a Hyperbolic Winglet Concept
Previous Article in Special Issue
An Overview of Cube-Satellite Propulsion Technologies and Trends
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle
Aerospace 2018, 5(1), 1; https://doi.org/10.3390/aerospace5010001

Molecular Dynamics Electrospray Simulations of Coarse-Grained Ethylammonium Nitrate (EAN) and 1-Ethyl-3-Methylimidazolium Tetrafluoroborate (EMIM-BF4)

Department of Aerospace Engineering, University of Illinois at Urbana–Champaign (UIUC), Urbana, IL 61810, USA
*
Author to whom correspondence should be addressed.
Received: 30 September 2017 / Revised: 20 December 2017 / Accepted: 25 December 2017 / Published: 28 December 2017
View Full-Text   |   Download PDF [3888 KB, uploaded 28 December 2017]   |  

Abstract

In this work, the use of molecular dynamics as a predictive tool for modeling the atomistic behavior of electrospray propulsion is discussed. 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIM-BF 4 ) and ethylammonium nitrate (EAN) were considered as two limits of ionic liquid (IL) propellants that tend to operate in an ion versus a droplet mode. The emission modes were found to depend on the electro-chemical properties of the IL propellant. The aprotic EMIM-BF 4 -based electrospray emitted primarily monomers and trimers as the dominant species and only small quantities of droplets. In contrast, trimers were the dominant emitted species in the protic EAN emissions with a significantly large contribution from droplets towards the total emission current, suggesting that EMIM-BF 4 -based colloid thrusters operate in ion mode and EAN-based devices operate in the droplet mode. Furthermore, the formation of the Taylor cone was found to depend on the mass flow rate and the external electric field strength. This paper provides a framework that can be extended for use to simulate any other ILs or their combinations. View Full-Text
Keywords: colloid thrusters; coarse-graining; ionic liquids colloid thrusters; coarse-graining; ionic liquids
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Mehta, N.A.; Levin, D.A. Molecular Dynamics Electrospray Simulations of Coarse-Grained Ethylammonium Nitrate (EAN) and 1-Ethyl-3-Methylimidazolium Tetrafluoroborate (EMIM-BF4). Aerospace 2018, 5, 1.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Aerospace EISSN 2226-4310 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top