Effect of convective schemes in wall-resolved and wall-modeled LES of compressible wall turbulence

Vanna, Francesco DeUniv Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy. (författare)

QC 20231122
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.

Baldan, GiacomoKTH,Datavetenskap(Swepub:kth)u1pqvc8u (författare)
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)
Benini, ErnestoUniv Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy. (författare)
Univ Padua, Dept Ind Engn, Via Venezia 1, I-35131 Padua, Italy.Datavetenskap (creator_code:org_t)

Av författaren/redakt...: Vanna, Francesco ...; Baldan, Giacomo; Picano, Francesc ...; Benini, Ernesto

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Strömningsmekani ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.