螺度导致的湍流压缩性下降及非普适性 (Turbulence Compressibility Reduction and Nonuniversality with Helicity)

The turbulence compressibility reduction with helicity is numerically verified and characterizes in some detail the universality and nonuniversality with respect to helical and nonhelical large-scale forcing. The nonuniversality deep in the dissipation range spectra is identified to be only in the power-law prefactors, with smaller exponents for the helical case.