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Effect of convectiv...
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Vanna, Francesco DeUniv Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy.
(författare)
Effect of convective schemes in wall-resolved and wall-modeled LES of compressible wall turbulence
- Artikel/kapitelEngelska2023
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Elsevier BV,2023
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LIBRIS-ID:oai:DiVA.org:kth-323352
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-323352URI
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https://doi.org/10.1016/j.compfluid.2022.105710DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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QC 20231122
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The current study discusses how numerical schemes and discretization approaches affect wall-resolved and wall-modeled LES outcomes. A turbulent boundary layer setup over a flat plate in both super-and hypersonic conditions is used to illustrate the effect of different numerical discretization strategies. In particular, six convective methods are examined, as well as various degrees of hybridization between shock-capturing and centered approaches: The former introducing non-negligible numerical viscosity, the latter being virtually dissipation-free. The analysis reveals that injected numerical viscosity due to upwinding procedures consid-erably alters wall dynamics for both wall-resolved and especially wall-modeled arrangements. In particular, if low-order or pure shock-capturing schemes are used, wall modeling fails in heading the system dynamics due to a strong modulation of main turbulent features. Conversely, realistic turbulence patterns are recovered if hybrid and/or high-order shock-capturing methods are employed. Thus, the paper establishes criteria for selecting a suitable numerical setup in wall-modeled LES, providing suggestions for grid resolution levels and convective scheme selection/hybridization. An overview perspective concerning numerical diffusion coupling with turbulent stresses in wall-resolved and wall-modeled LES is also provided.
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Baldan, GiacomoKTH,Datavetenskap(Swepub:kth)u1pqvc8u
(författare)
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Picano, FrancescoUniv Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy.;Univ Padua, Ctr Ateneo Studi & Att Spaziali Giuseppe Colombo C, Via Venezia 15, I-35131 Padua, Italy.
(författare)
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Benini, ErnestoUniv Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy.
(författare)
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Univ Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy.Datavetenskap
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Computers & Fluids: Elsevier BV250, s. 105710-0045-79301879-0747
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