Dissimilar scalar dissipation structures in stratified turbulence with differential diffusion of heat and salinity

本文通过直接数值模拟、分层水槽实验和快速畸变理论，研究了存在一个被动标量和两个主动标量时，分层湍流标量谱和速度谱不相似的原因。结果表明，当Ozmidov尺度小于Kolmogorov尺度时，活动标量的方差在Kolmogorov尺度附近耗散。

The origin of dissimilarity between scalar and velocity spectra in stratified turbulence has been investigated by direct numerical simulation, stratified tank experiments and rapid distortion theory when there is a passive scalar or when there are two active scalars. The results show that when the Ozmidov scale is smaller than the Kolmogorov scale, variance of the active scalar dissipates near the Kolmogorov scale.