Two dimensional free convection turbulence is examined by DNS. Coherent structures (CS) similar to worms in 3D Navier-Stokes turbulence are observed. These CSs are defined by the regions with high Tvorticity, ({partial deriv}T/{partial deriv}y, -{partial deriv}T/{partial deriv}x). We obtained the Burgers T-vortex layer solutions, which are shown to be a good approximation of CSs. The intermittency of entropy (T{sup}2/2) dissipation rate is also examined in relation with the most singular structure.
展开▼
机译：DNS检查二维自由对流湍流。观察到与3D Navier-Stokes湍流类似于蠕虫的相干结构（CS）。这些CSS由具有高电平性的区域定义（{Partial deriv} t / {partive deriv} y， - {partial deriv} t / {partial deriv} x）。我们获得了汉堡T-Vortex层解决方案，其被证明是CSS的良好近似。还与最奇异的结构相关的熵（T {SUP} 2/2）耗散率的间歇性。
展开▼
