FluidVerse/3D_SDBA_SSOOSS
收藏资源简介：
该数据集捕捉了在空气中受到外部冲击波作用的3D球形液滴的时间演化行为。当冲击波作用于液滴时，初始响应（主要与韦伯数无关）是一个变形阶段，液滴变平。这种与冲击波的相互作用导致液滴的两种不同破碎模式（SIE和RTP）。在SIE模式下，破碎主要由沿液滴表面的强剪切力驱动。液滴变平后，剪切引起的扰动在赤道附近出现；这些不稳定性起源于液滴赤道附近，并在第一阶段液滴变平后沿液滴表面平流。随着液滴与周围气体之间的相对速度增加，这些扰动由于Kelvin-Helmholtz不稳定性而增长，最终从液滴中剥离液体并在下游产生细小液滴。相比之下，在RTP模式下，相对较强的表面张力抑制了这种剪切不稳定性的增长，保持了更平滑的界面。随着变形的进行，液滴的上游侧变得凹入，因为周围气体穿透并刺穿液体。与RTP不同，SIE模式的特点是质量和连续逐渐损失，通常在下游产生液滴雾。这里我们研究了在北、南、顶部和底部壁具有对称边界条件的情况。
The dataset captures the time-evolving behavior of 3D spherical droplets subjected to an external shock wave in air. When a shock wave impacts a droplet, the initial response—largely independent of the Weber number—is a deformation phase in which the droplet flattens. This interaction with the shock wave results in two different breakup-modes of the droplet (SIE and RTP). In the SIE regime, breakup is driven mainly by strong shear forces acting along the droplet surface. After the droplet has flattened, shear-induced disturbances emerge near the equator; these instabilities originate near the droplet equator after the droplet has flattened out in the first phase and are advected along the droplet surface. As the relative velocity between the droplet and the surrounding gas increases, these disturbances grow due to Kelvin–Helmholtz instability, eventually stripping liquid from the droplet and producing fine droplets downstream. In contrast, in the RTP regime, relatively stronger surface tension suppresses the growth of such shear instabilities, maintaining a smoother interface. As deformation progresses, the upstream side of the droplet becomes concave as the surrounding gas penetrates and pierces the liquid. Unlike RTP, the SIE regime is characterized by a continuous and gradual loss of mass, often resulting in a mist of droplets downstream. Here we investigate a scenario with symmetric boundary conditions at the north, south, top and bottom walls.
