Numerical evidence of universal scaling for the scalar variance spectrum in forced homogeneous turbulence
type: Distribution
access URL: https://hal.science/hal-00769144
format: HTML
issued: 2026-05-13T19:20:06.847452
modified: 2026-05-13T19:20:06.752654

test_moissonnage_selune
type: Agent

Numerical evidence of universal scaling for the scalar variance spectrum in forced homogeneous turbulence
type: Dataset
contact point: Organization
  fn: CCSD
keyword: univsersal-scaling
keyword: spectral-method
keyword: turbulent-flow
keyword: scalar-variance
keyword: infoeu-reposemanticspreprint
keyword: preprints-working-papers-
keyword: mathmath-namathematics-mathnumerical-analysis-mathna
keyword: particle-method
keyword: hybrid-method
landing page: https://hal.science/hal-00769144
description: In this paper, the spectrum of high Schmidt number passive scalar in forced homogeneous isotropic turbulence is studied through direct numerical simulations. An hybrid spectral-particle method is used with a finer resolution of the scalar than of the momentum and large time-steps. This approach enables to perform a systematic analysis over a wide range of Schmidt numbers. Our results recover the theoretical scaling for the variance scalar spectrum, and its relationship with the value of the Schmidt number, for large, intermediate and small scales. The influence of the form of the scalar forcing is also discussed.
issued: 2026-05-13T19:20:06.793650
language: en
modified: 2026-05-13T19:20:06.793662