WEKO3
アイテム
{"_buckets": {"deposit": "b01265bb-e524-48d0-9b9a-0c9e9262e158"}, "_deposit": {"created_by": 29, "id": "1187", "owners": [29], "pid": {"revision_id": 0, "type": "depid", "value": "1187"}, "status": "published"}, "_oai": {"id": "oai:oist.repo.nii.ac.jp:00001187", "sets": ["15"]}, "author_link": ["6576", "6575"], "item_10001_biblio_info_7": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2019-08-30", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "48", "bibliographicPageStart": "484001", "bibliographicVolumeNumber": "31", "bibliographic_titles": [{}, {"bibliographic_title": "Journal of Physics: Condensed Matter", "bibliographic_titleLang": "en"}]}]}, "item_10001_creator_3": {"attribute_name": "Author", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Paraz, F"}], "nameIdentifiers": [{"nameIdentifier": "6575", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Bandi, M M"}], "nameIdentifiers": [{"nameIdentifier": "6576", "nameIdentifierScheme": "WEKO"}]}]}, "item_10001_description_5": {"attribute_name": "Abstract", "attribute_value_mlt": [{"subitem_description": "We experimentally study the temporal second-order structure functions for integer powers of turbulent fluid velocity fluctuations [Formula: see text], in three dimensional (3D) and two dimensional (2D) turbulence. Here [Formula: see text] is a composite time-series constructed by averaging the concurrent time-series ([Formula: see text]) sampled at N spatially distributed Eulerian points. The N = 1 case has been extensively studied for velocity fluctuations (m = 1) and to a lesser extent for m \u003e 1. The averaging method in case of N \u003e 1 diverges from the Kolmogorov framework and has not been studied because fluctuations in [Formula: see text] are expected to smooth with increasing N leaving behind uninteresting large-scale mean flow information, but we find this is not so. We report the evolution of scaling exponents [Formula: see text] for [Formula: see text] in going from a single (N = 1) to a spatial average over several Eulerian points ([Formula: see text]). Our 3D experiments in a tank with rotating jets at the floor show [Formula: see text] for all m-values in agreement with prior results and evolves to an asymptotic value of [Formula: see text]. The evolution of [Formula: see text] follows the functional form [Formula: see text], where [Formula: see text] points is the only fit parameter representing the convergence rate constant. Results for the 2D experiments conducted in a gravity assisted soap film in the enstrophy cascade regime are in sharp contrast with their 3D counterparts. Firstly [Formula: see text] varies polynomially with m and asymptotes to a constant value at m = 5. Secondly, the evolution of [Formula: see text] is logarithmic [Formula: see text], where A and B are fit parameters and eventually deviates at large N and asymptotes to [Formula: see text] for all m. The starkly different convergence forms (exponential in 3D versus logarithmic in 2D) may be interpreted as a signature of inter-scale couplings in the respective turbulent flows by decomposing the two-point correlator for [Formula: see text] into a self-correlation and cross-correlation term. In addition to aiding in the theoretical development, the results may also have implications for determination of resolution in 2D turbulence experiments and simulations, wind energy and atmospheric boundary layer turbulence.", "subitem_description_type": "Other"}]}, "item_10001_publisher_8": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_publisher": "IOP Publishing"}]}, "item_10001_relation_13": {"attribute_name": "PubMedNo.", "attribute_value_mlt": [{"subitem_relation_type": "isIdenticalTo", "subitem_relation_type_id": {"subitem_relation_type_id_text": "info:pmid/31387090", "subitem_relation_type_select": "PMID"}}]}, "item_10001_relation_14": {"attribute_name": "DOI", "attribute_value_mlt": [{"subitem_relation_type": "isIdenticalTo", "subitem_relation_type_id": {"subitem_relation_type_id_text": "info:doi/10.1088/1361-648X/ab38ca", "subitem_relation_type_select": "DOI"}}]}, "item_10001_relation_16": {"attribute_name": "情報源", "attribute_value_mlt": [{"subitem_relation_name": [{"subitem_relation_name_text": "https://creativecommons.org/licenses/by/3.0/"}]}]}, "item_10001_relation_17": {"attribute_name": "Related site", "attribute_value_mlt": [{"subitem_relation_type_id": {"subitem_relation_type_id_text": "https://iopscience.iop.org/article/10.1088/1361-648X/ab38ca", "subitem_relation_type_select": "URI"}}]}, "item_10001_rights_15": {"attribute_name": "Rights", "attribute_value_mlt": [{"subitem_rights": "© 2019 IOP Publishing Ltd"}]}, "item_10001_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0953-8984", "subitem_source_identifier_type": "ISSN"}, {"subitem_source_identifier": "1361-648X", "subitem_source_identifier_type": "ISSN"}]}, "item_10001_version_type_20": {"attribute_name": "Author\u0027s flag", "attribute_value_mlt": [{"subitem_version_resource": "http://purl.org/coar/version/c_970fb48d4fbd8a85", "subitem_version_type": "VoR"}]}, "item_files": {"attribute_name": "ファイル情報", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2020-02-20"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "Paraz-2019-Second order structure functions fo.pdf", "filesize": [{"value": "2.0 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_6", "mimetype": "application/pdf", "size": 2000000.0, "url": {"label": "Paraz-2019-Second order structure functions fo", "url": "https://oist.repo.nii.ac.jp/record/1187/files/Paraz-2019-Second order structure functions fo.pdf"}, "version_id": "30dcb228-408e-4b37-a199-183ce167656c"}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Second order structure functions for higher powers of turbulent velocity", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Second order structure functions for higher powers of turbulent velocity", "subitem_title_language": "en"}]}, "item_type_id": "10001", "owner": "29", "path": ["15"], "permalink_uri": "https://oist.repo.nii.ac.jp/records/1187", "pubdate": {"attribute_name": "公開日", "attribute_value": "2020-02-20"}, "publish_date": "2020-02-20", "publish_status": "0", "recid": "1187", "relation": {}, "relation_version_is_last": true, "title": ["Second order structure functions for higher powers of turbulent velocity"], "weko_shared_id": 29}
Second order structure functions for higher powers of turbulent velocity
https://oist.repo.nii.ac.jp/records/1187
https://oist.repo.nii.ac.jp/records/1187a112ae06-e675-4d83-af0b-5da0e036596a
名前 / ファイル | ライセンス | アクション |
---|---|---|
Paraz-2019-Second order structure functions fo (2.0 MB)
|
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2020-02-20 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Second order structure functions for higher powers of turbulent velocity | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Paraz, F
× Paraz, F× Bandi, M M |
|||||
書誌情報 |
en : Journal of Physics: Condensed Matter 巻 31, 号 48, p. 484001, 発行日 2019-08-30 |
|||||
抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | We experimentally study the temporal second-order structure functions for integer powers of turbulent fluid velocity fluctuations [Formula: see text], in three dimensional (3D) and two dimensional (2D) turbulence. Here [Formula: see text] is a composite time-series constructed by averaging the concurrent time-series ([Formula: see text]) sampled at N spatially distributed Eulerian points. The N = 1 case has been extensively studied for velocity fluctuations (m = 1) and to a lesser extent for m > 1. The averaging method in case of N > 1 diverges from the Kolmogorov framework and has not been studied because fluctuations in [Formula: see text] are expected to smooth with increasing N leaving behind uninteresting large-scale mean flow information, but we find this is not so. We report the evolution of scaling exponents [Formula: see text] for [Formula: see text] in going from a single (N = 1) to a spatial average over several Eulerian points ([Formula: see text]). Our 3D experiments in a tank with rotating jets at the floor show [Formula: see text] for all m-values in agreement with prior results and evolves to an asymptotic value of [Formula: see text]. The evolution of [Formula: see text] follows the functional form [Formula: see text], where [Formula: see text] points is the only fit parameter representing the convergence rate constant. Results for the 2D experiments conducted in a gravity assisted soap film in the enstrophy cascade regime are in sharp contrast with their 3D counterparts. Firstly [Formula: see text] varies polynomially with m and asymptotes to a constant value at m = 5. Secondly, the evolution of [Formula: see text] is logarithmic [Formula: see text], where A and B are fit parameters and eventually deviates at large N and asymptotes to [Formula: see text] for all m. The starkly different convergence forms (exponential in 3D versus logarithmic in 2D) may be interpreted as a signature of inter-scale couplings in the respective turbulent flows by decomposing the two-point correlator for [Formula: see text] into a self-correlation and cross-correlation term. In addition to aiding in the theoretical development, the results may also have implications for determination of resolution in 2D turbulence experiments and simulations, wind energy and atmospheric boundary layer turbulence. | |||||
出版者 | ||||||
出版者 | IOP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0953-8984 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1361-648X | |||||
PubMed番号 | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | PMID | |||||
関連識別子 | info:pmid/31387090 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1088/1361-648X/ab38ca | |||||
権利 | ||||||
権利情報 | © 2019 IOP Publishing Ltd | |||||
情報源 | ||||||
関連名称 | https://creativecommons.org/licenses/by/3.0/ | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://iopscience.iop.org/article/10.1088/1361-648X/ab38ca | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |