A parametric study for kinetic modeling of emissive sheaths using electrostatic particle-in-cell method

Davut Vatansever, Nakul Nuwal, Deborah A. Levin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A one dimensional collisionless space charge limited (SCL) sheath is solved by using electrostatic Particle-in-cell (PIC) method. We conduct a parametric study with different plasma conditions to understand the emissive nature of SCL sheaths and electron transpiration cooling (ETC) of the surface in high speed flows. It is seen that potential profile along a 1-D plasma is sensitive to changes of the ion to electron mass ratio (mi/me), the electron emission temperature (Temit), the number of emitted particles (Nemit) and length of the plasma slab (L). We observe that the emitted electrons with higher energies escape the SCL sheath more easily but others are trapped within the SCL sheath. The thermionic emission from the emitting wall increases with increased ion to electron mass ratio and electron emission temperature but becomes less when the length of plasma is increased.

Original languageEnglish (US)
Title of host publicationAIAA AVIATION 2022 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106354
DOIs
StatePublished - 2022
EventAIAA AVIATION 2022 Forum - Chicago, United States
Duration: Jun 27 2022Jul 1 2022

Publication series

NameAIAA AVIATION 2022 Forum

Conference

ConferenceAIAA AVIATION 2022 Forum
Country/TerritoryUnited States
CityChicago
Period6/27/227/1/22

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Aerospace Engineering

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