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Title: Nonequilibrium Phenomena in (Quasi-)thermal Plasma Flows

Abstract

Thermal plasmas are utilized in diverse applications that require high power densities or throughputs, such as metal cutting, welding, spraying, metallurgy, and materials synthesis. Thermal plasma applications involve interactions between the highly energetic plasma and working gas streams, confining devices, or processing materials. Whereas thermal plasma implies a state of equilibrium (i.e. Local Thermodynamic Equilibrium, LTE), due to the above interactions, thermal plasma flows depict nonequilibrium phenomena of two types: kinetic and dissipative. Kinetic nonequilibrium manifests microscopically and is caused by localized imbalances between particles and fields interactions. Its occurrence is illustrated, for example, as deviations from thermal equilibrium between heavy-species and electrons or from mass-action laws. In contrast, dissipative nonequilibrium reveals macroscopically and is produced by external driving forces that incite distributed responses, such as the growth of instabilities, the occurrence of self-organization, or the establishment of turbulence. While kinetic nonequilibrium has been increasingly incorporated in thermal plasma flow models (e.g. finite-rate chemistry, two-temperature models), it is the great advances in numerical computing that is enabling the exploration of dissipative nonequilibrium (e.g. pattern formation, small-scale turbulent features). Both types of nonequilibrium are reviewed, including their estimation and incidence, within the context of computational models and their relevance to thermalmore » plasma sources and processes.« less

Authors:
ORCiD logo [1]
  1. Univ. of Massachusetts, Lowell, MA (United States)
Publication Date:
Research Org.:
Univ. of Massachusetts, Lowell, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)
OSTI Identifier:
1623351
Grant/Contract Number:  
SC0018230; CBET-1552037
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Plasma Chemistry and Plasma Processing
Additional Journal Information:
Journal Volume: 40; Journal Issue: 3; Journal ID: ISSN 0272-4324
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; non-LTE; two-temperature model; instability; dissipative structures; pattern formation

Citation Formats

Trelles, Juan Pablo. Nonequilibrium Phenomena in (Quasi-)thermal Plasma Flows. United States: N. p., 2019. Web. doi:10.1007/s11090-019-10046-1.
Trelles, Juan Pablo. Nonequilibrium Phenomena in (Quasi-)thermal Plasma Flows. United States. https://doi.org/10.1007/s11090-019-10046-1
Trelles, Juan Pablo. Sat . "Nonequilibrium Phenomena in (Quasi-)thermal Plasma Flows". United States. https://doi.org/10.1007/s11090-019-10046-1. https://www.osti.gov/servlets/purl/1623351.
@article{osti_1623351,
title = {Nonequilibrium Phenomena in (Quasi-)thermal Plasma Flows},
author = {Trelles, Juan Pablo},
abstractNote = {Thermal plasmas are utilized in diverse applications that require high power densities or throughputs, such as metal cutting, welding, spraying, metallurgy, and materials synthesis. Thermal plasma applications involve interactions between the highly energetic plasma and working gas streams, confining devices, or processing materials. Whereas thermal plasma implies a state of equilibrium (i.e. Local Thermodynamic Equilibrium, LTE), due to the above interactions, thermal plasma flows depict nonequilibrium phenomena of two types: kinetic and dissipative. Kinetic nonequilibrium manifests microscopically and is caused by localized imbalances between particles and fields interactions. Its occurrence is illustrated, for example, as deviations from thermal equilibrium between heavy-species and electrons or from mass-action laws. In contrast, dissipative nonequilibrium reveals macroscopically and is produced by external driving forces that incite distributed responses, such as the growth of instabilities, the occurrence of self-organization, or the establishment of turbulence. While kinetic nonequilibrium has been increasingly incorporated in thermal plasma flow models (e.g. finite-rate chemistry, two-temperature models), it is the great advances in numerical computing that is enabling the exploration of dissipative nonequilibrium (e.g. pattern formation, small-scale turbulent features). Both types of nonequilibrium are reviewed, including their estimation and incidence, within the context of computational models and their relevance to thermal plasma sources and processes.},
doi = {10.1007/s11090-019-10046-1},
url = {https://www.osti.gov/biblio/1623351}, journal = {Plasma Chemistry and Plasma Processing},
issn = {0272-4324},
number = 3,
volume = 40,
place = {United States},
year = {2019},
month = {11}
}

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Cited by: 2 works
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    Works referencing / citing this record:

    Simulating Turbulent Thermal Plasma Flows for Nanopowder Fabrication
    journal, January 2020