Document Type
Article
Publication Date
7-7-2021
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
This paper presents a simple model for slightly charged gas expanding into a vacuum from a planar exit. The number density, bulk velocity, temperature, and potential at the exit are given. The electric field force is assumed weaker than the convection term and is neglected in the analysis. As such, the quasi-neutral condition is naturally adopted and the potential field is computed with the Boltzmann relation. At far field, the exit degenerates as a point source, and simplified analytical formulas for flow and electric fields are obtained. The results are generic and offer insights on many existing models in the literature. They can be used to quickly approximate the flowfield and potential distributions without numerical simulations. They can also be used to initialize a simulation. Based on these results, more advanced models may be further developed.
Publication Title
Fluids
Recommended Citation
Cai, S.,
&
Cai, C.
(2021).
A simple gas-kinetic model for dilute and weakly charged plasma micro-jet flows.
Fluids,
6(7).
http://doi.org/10.3390/fluids6070250
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/15102
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Publisher’s version of record: https://doi.org/10.3390/fluids6070250