Saini, Rohit ; Karimi, Nader ; Duan, Lian ; Sadiki, Amsini ; Mehdizadeh, Amirfarhang (2024)
Effects of Near Wall Modeling in the Improved-Delayed-Detached-Eddy-Simulation (IDDES) Methodology.
In: Entropy, 2018, 20 (10)
doi: 10.26083/tuprints-00015841
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
The present study aims to assess the effects of two different underlying RANS models on overall behavior of the IDDES methodology when applied to different flow configurations ranging from fully attached (plane channel flow) to separated flows (periodic hill flow). This includes investigating prediction accuracy of first and second order statistics, response to grid refinement, grey area dynamics and triggering mechanism. Further, several criteria have been investigated to assess reliability and quality of the methodology when operating in scale resolving mode. It turns out that irrespective of the near wall modeling strategy, the IDDES methodology does not satisfy all criteria required to make this methodology reliable when applied to various flow configurations at different Reynolds numbers with different grid resolutions. Further, it is found that using more advanced underlying RANS model to improve prediction accuracy of the near wall dynamics results in extension of the grey area, which may delay the transition to scale resolving mode. This systematic study for attached and separated flows suggests that the shortcomings of IDDES methodology mostly lie in inaccurate prediction of the dynamics inside the grey area and demands further investigation in this direction to make this methodology capable of dealing with different flow situations reliably.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Saini, Rohit ; Karimi, Nader ; Duan, Lian ; Sadiki, Amsini ; Mehdizadeh, Amirfarhang |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Effects of Near Wall Modeling in the Improved-Delayed-Detached-Eddy-Simulation (IDDES) Methodology |
| Sprache: | Englisch |
| Publikationsjahr: | 16 Januar 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2018 |
| Ort der Erstveröffentlichung: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Entropy |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| (Heft-)Nummer: | 10 |
| Kollation: | 39 Seiten |
| DOI: | 10.26083/tuprints-00015841 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/15841 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | The present study aims to assess the effects of two different underlying RANS models on overall behavior of the IDDES methodology when applied to different flow configurations ranging from fully attached (plane channel flow) to separated flows (periodic hill flow). This includes investigating prediction accuracy of first and second order statistics, response to grid refinement, grey area dynamics and triggering mechanism. Further, several criteria have been investigated to assess reliability and quality of the methodology when operating in scale resolving mode. It turns out that irrespective of the near wall modeling strategy, the IDDES methodology does not satisfy all criteria required to make this methodology reliable when applied to various flow configurations at different Reynolds numbers with different grid resolutions. Further, it is found that using more advanced underlying RANS model to improve prediction accuracy of the near wall dynamics results in extension of the grey area, which may delay the transition to scale resolving mode. This systematic study for attached and separated flows suggests that the shortcomings of IDDES methodology mostly lie in inaccurate prediction of the dynamics inside the grey area and demands further investigation in this direction to make this methodology capable of dealing with different flow situations reliably. |
| Freie Schlagworte: | hybrid (U)RANS-LES, IDDES methodology, attached and separated flows |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-158410 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Intermittency and Self-Organisation in Turbulence and Statistical Mechanics |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Energie- und Kraftwerkstechnik (EKT) |
| Hinterlegungsdatum: | 16 Jan 2024 12:33 |
| Letzte Änderung: | 17 Jan 2024 09:13 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Effects of Near Wall Modeling in the Improved-Delayed-Detached-Eddy-Simulation (IDDES) Methodology. (deposited 16 Jan 2024 12:33) [Gegenwärtig angezeigt]
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