Loading…
Dynamics of seeded blobs under the influence of inelastic neutral interactions
Field-aligned filaments, the so-called blobs, born at the edge of the magnetically confined region of tokamaks propagate radially outward into the scrape-off layer (SOL) region that allows for a substantial population of neutral particles compared to the region of confinement. The electrons and ions...
Saved in:
Published in: | Physics of plasmas 2020-05, Vol.27 (5) |
---|---|
Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
cited_by | cdi_FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603 |
---|---|
cites | cdi_FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603 |
container_end_page | |
container_issue | 5 |
container_start_page | |
container_title | Physics of plasmas |
container_volume | 27 |
creator | Thrysøe, A. S. Naulin, V. Nielsen, A. H. Juul Rasmussen, J. |
description | Field-aligned filaments, the so-called blobs, born at the edge of the magnetically confined region of tokamaks propagate radially outward into the scrape-off layer (SOL) region that allows for a substantial population of neutral particles compared to the region of confinement. The electrons and ions constituting the blob undergo both elastic and inelastic collisions with the neutral particles, and the latter leads to sources and sinks of the blob density, momentum, and heat. The influence of the inelastic collisions with neutrals on the evolution of seeded blobs is investigated numerically by the nHESEL drift-fluid model through a series of discrete scans in interactions, active source terms, and blob plasma parameters. In light of the results, the potential influence of local inelastic collisions on the SOL density shoulder formation is discussed. It is found that density sources increase the blob compactness, which delays the blob dispersion and decreases the dispersion rate. Density sources or momentum sinks also influence the blob dynamics by increasing the vorticity layer around the perturbation, whereas the pressure sources/sinks only affect the blob dynamics marginally. The change to the vorticity structure leads, in most cases, to a decrease in the radial velocity of the blob center of mass, although, at high source rates, a radial acceleration of the blob center of mass is also observed. Density sources may, thus, contribute to shoulder formation not only by increasing the density locally but also by changing the filament dynamics. |
doi_str_mv | 10.1063/5.0003262 |
format | article |
fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2402599629</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2402599629</sourcerecordid><originalsourceid>FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603</originalsourceid><addsrcrecordid>eNp90E1LxDAQBuAgCq6rB_9BwZNC1yRN0vYo6ycselHwFtJkgl26yZqkwv57W7roQfA0w_Aww7wInRO8IFgU13yBMS6ooAdoRnBV56Uo2eHYlzgXgr0fo5MY1wNiglcz9Hy7c2rT6ph5m0UAAyZrOt_ErHcGQpY-IGud7XpwGkbTOuhUTK3OHPQpqG6YJAhKp9a7eIqOrOoinO3rHL3d370uH_PVy8PT8maV60LQlJeEUFWxhlUMY1BWAGaGcKapMoaWBgvDuQLREN6UA7GGlLq2mhRcsUrgYo4upr3b4D97iEmufR_ccFJShimva0HrQV1OSgcfYwArt6HdqLCTBMsxLsnlPq7BXk026jap8Zkf_OXDL5RbY__Dfzd_A5daeCY</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2402599629</pqid></control><display><type>article</type><title>Dynamics of seeded blobs under the influence of inelastic neutral interactions</title><source>American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)</source><source>AIP - American Institute of Physics</source><creator>Thrysøe, A. S. ; Naulin, V. ; Nielsen, A. H. ; Juul Rasmussen, J.</creator><creatorcontrib>Thrysøe, A. S. ; Naulin, V. ; Nielsen, A. H. ; Juul Rasmussen, J.</creatorcontrib><description>Field-aligned filaments, the so-called blobs, born at the edge of the magnetically confined region of tokamaks propagate radially outward into the scrape-off layer (SOL) region that allows for a substantial population of neutral particles compared to the region of confinement. The electrons and ions constituting the blob undergo both elastic and inelastic collisions with the neutral particles, and the latter leads to sources and sinks of the blob density, momentum, and heat. The influence of the inelastic collisions with neutrals on the evolution of seeded blobs is investigated numerically by the nHESEL drift-fluid model through a series of discrete scans in interactions, active source terms, and blob plasma parameters. In light of the results, the potential influence of local inelastic collisions on the SOL density shoulder formation is discussed. It is found that density sources increase the blob compactness, which delays the blob dispersion and decreases the dispersion rate. Density sources or momentum sinks also influence the blob dynamics by increasing the vorticity layer around the perturbation, whereas the pressure sources/sinks only affect the blob dynamics marginally. The change to the vorticity structure leads, in most cases, to a decrease in the radial velocity of the blob center of mass, although, at high source rates, a radial acceleration of the blob center of mass is also observed. Density sources may, thus, contribute to shoulder formation not only by increasing the density locally but also by changing the filament dynamics.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/5.0003262</identifier><identifier>CODEN: PHPAEN</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Acceleration ; Center of mass ; Density ; Dynamics ; Elastic scattering ; Filaments ; Heat sinks ; Inelastic collisions ; Momentum ; Neutral particles ; Perturbation ; Plasma physics ; Radial velocity ; Tokamak devices ; Vorticity</subject><ispartof>Physics of plasmas, 2020-05, Vol.27 (5)</ispartof><rights>Author(s)</rights><rights>2020 Author(s). Published under license by AIP Publishing.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603</citedby><cites>FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603</cites><orcidid>0000-0003-3642-3905 ; 0000-0002-7761-5156 ; 0000-0002-3543-690X ; 0000-0001-5452-9215</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/pop/article-lookup/doi/10.1063/5.0003262$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,780,782,784,795,27924,27925,76383</link.rule.ids></links><search><creatorcontrib>Thrysøe, A. S.</creatorcontrib><creatorcontrib>Naulin, V.</creatorcontrib><creatorcontrib>Nielsen, A. H.</creatorcontrib><creatorcontrib>Juul Rasmussen, J.</creatorcontrib><title>Dynamics of seeded blobs under the influence of inelastic neutral interactions</title><title>Physics of plasmas</title><description>Field-aligned filaments, the so-called blobs, born at the edge of the magnetically confined region of tokamaks propagate radially outward into the scrape-off layer (SOL) region that allows for a substantial population of neutral particles compared to the region of confinement. The electrons and ions constituting the blob undergo both elastic and inelastic collisions with the neutral particles, and the latter leads to sources and sinks of the blob density, momentum, and heat. The influence of the inelastic collisions with neutrals on the evolution of seeded blobs is investigated numerically by the nHESEL drift-fluid model through a series of discrete scans in interactions, active source terms, and blob plasma parameters. In light of the results, the potential influence of local inelastic collisions on the SOL density shoulder formation is discussed. It is found that density sources increase the blob compactness, which delays the blob dispersion and decreases the dispersion rate. Density sources or momentum sinks also influence the blob dynamics by increasing the vorticity layer around the perturbation, whereas the pressure sources/sinks only affect the blob dynamics marginally. The change to the vorticity structure leads, in most cases, to a decrease in the radial velocity of the blob center of mass, although, at high source rates, a radial acceleration of the blob center of mass is also observed. Density sources may, thus, contribute to shoulder formation not only by increasing the density locally but also by changing the filament dynamics.</description><subject>Acceleration</subject><subject>Center of mass</subject><subject>Density</subject><subject>Dynamics</subject><subject>Elastic scattering</subject><subject>Filaments</subject><subject>Heat sinks</subject><subject>Inelastic collisions</subject><subject>Momentum</subject><subject>Neutral particles</subject><subject>Perturbation</subject><subject>Plasma physics</subject><subject>Radial velocity</subject><subject>Tokamak devices</subject><subject>Vorticity</subject><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp90E1LxDAQBuAgCq6rB_9BwZNC1yRN0vYo6ycselHwFtJkgl26yZqkwv57W7roQfA0w_Aww7wInRO8IFgU13yBMS6ooAdoRnBV56Uo2eHYlzgXgr0fo5MY1wNiglcz9Hy7c2rT6ph5m0UAAyZrOt_ErHcGQpY-IGud7XpwGkbTOuhUTK3OHPQpqG6YJAhKp9a7eIqOrOoinO3rHL3d370uH_PVy8PT8maV60LQlJeEUFWxhlUMY1BWAGaGcKapMoaWBgvDuQLREN6UA7GGlLq2mhRcsUrgYo4upr3b4D97iEmufR_ccFJShimva0HrQV1OSgcfYwArt6HdqLCTBMsxLsnlPq7BXk026jap8Zkf_OXDL5RbY__Dfzd_A5daeCY</recordid><startdate>202005</startdate><enddate>202005</enddate><creator>Thrysøe, A. S.</creator><creator>Naulin, V.</creator><creator>Nielsen, A. H.</creator><creator>Juul Rasmussen, J.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-3642-3905</orcidid><orcidid>https://orcid.org/0000-0002-7761-5156</orcidid><orcidid>https://orcid.org/0000-0002-3543-690X</orcidid><orcidid>https://orcid.org/0000-0001-5452-9215</orcidid></search><sort><creationdate>202005</creationdate><title>Dynamics of seeded blobs under the influence of inelastic neutral interactions</title><author>Thrysøe, A. S. ; Naulin, V. ; Nielsen, A. H. ; Juul Rasmussen, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Acceleration</topic><topic>Center of mass</topic><topic>Density</topic><topic>Dynamics</topic><topic>Elastic scattering</topic><topic>Filaments</topic><topic>Heat sinks</topic><topic>Inelastic collisions</topic><topic>Momentum</topic><topic>Neutral particles</topic><topic>Perturbation</topic><topic>Plasma physics</topic><topic>Radial velocity</topic><topic>Tokamak devices</topic><topic>Vorticity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Thrysøe, A. S.</creatorcontrib><creatorcontrib>Naulin, V.</creatorcontrib><creatorcontrib>Nielsen, A. H.</creatorcontrib><creatorcontrib>Juul Rasmussen, J.</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Thrysøe, A. S.</au><au>Naulin, V.</au><au>Nielsen, A. H.</au><au>Juul Rasmussen, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dynamics of seeded blobs under the influence of inelastic neutral interactions</atitle><jtitle>Physics of plasmas</jtitle><date>2020-05</date><risdate>2020</risdate><volume>27</volume><issue>5</issue><issn>1070-664X</issn><eissn>1089-7674</eissn><coden>PHPAEN</coden><abstract>Field-aligned filaments, the so-called blobs, born at the edge of the magnetically confined region of tokamaks propagate radially outward into the scrape-off layer (SOL) region that allows for a substantial population of neutral particles compared to the region of confinement. The electrons and ions constituting the blob undergo both elastic and inelastic collisions with the neutral particles, and the latter leads to sources and sinks of the blob density, momentum, and heat. The influence of the inelastic collisions with neutrals on the evolution of seeded blobs is investigated numerically by the nHESEL drift-fluid model through a series of discrete scans in interactions, active source terms, and blob plasma parameters. In light of the results, the potential influence of local inelastic collisions on the SOL density shoulder formation is discussed. It is found that density sources increase the blob compactness, which delays the blob dispersion and decreases the dispersion rate. Density sources or momentum sinks also influence the blob dynamics by increasing the vorticity layer around the perturbation, whereas the pressure sources/sinks only affect the blob dynamics marginally. The change to the vorticity structure leads, in most cases, to a decrease in the radial velocity of the blob center of mass, although, at high source rates, a radial acceleration of the blob center of mass is also observed. Density sources may, thus, contribute to shoulder formation not only by increasing the density locally but also by changing the filament dynamics.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/5.0003262</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-3642-3905</orcidid><orcidid>https://orcid.org/0000-0002-7761-5156</orcidid><orcidid>https://orcid.org/0000-0002-3543-690X</orcidid><orcidid>https://orcid.org/0000-0001-5452-9215</orcidid><oa>free_for_read</oa></addata></record> |
fulltext | fulltext |
identifier | ISSN: 1070-664X |
ispartof | Physics of plasmas, 2020-05, Vol.27 (5) |
issn | 1070-664X 1089-7674 |
language | eng |
recordid | cdi_proquest_journals_2402599629 |
source | American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP - American Institute of Physics |
subjects | Acceleration Center of mass Density Dynamics Elastic scattering Filaments Heat sinks Inelastic collisions Momentum Neutral particles Perturbation Plasma physics Radial velocity Tokamak devices Vorticity |
title | Dynamics of seeded blobs under the influence of inelastic neutral interactions |
url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T12%3A12%3A08IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Dynamics%20of%20seeded%20blobs%20under%20the%20influence%20of%20inelastic%20neutral%20interactions&rft.jtitle=Physics%20of%20plasmas&rft.au=Thrys%C3%B8e,%20A.%20S.&rft.date=2020-05&rft.volume=27&rft.issue=5&rft.issn=1070-664X&rft.eissn=1089-7674&rft.coden=PHPAEN&rft_id=info:doi/10.1063/5.0003262&rft_dat=%3Cproquest_cross%3E2402599629%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c362t-7112a84b48400eaf6e04d154c2add27d06d55ae6b15b7400fd17c9fc135a48603%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2402599629&rft_id=info:pmid/&rfr_iscdi=true |