简介：Wefindanasymptoticexpressionforthecharacteristictimescalesofdecorrelationprocessesinweaklycompressibleandisothermalturbulence.ThisresultisusedintheEddy-DampedQuasi-NormalMarkovianequationtoderivethescalingsofcompressibleenergyspectra:(1)iftheacousticwavesaredominant,thecompressibleenergyspectraexhibit?7/3scaling;(2)iflocaleddystrainingisdominant,thecompressibleenergyspectraarescaledas?3.Meanwhile,theenergyspectraofincompressiblecomponentsdisplaythesamescalingof?5/3asthoseinincompressibleturbulence.Thedirectnumericalsimulationsofweaklycompressibleturbulenceareusedtoexaminethescaling.
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