在无旋强迫流动中如何产生涡量？
How can vorticity be produced in irrotationally forced flows?
摘要：
球形流体动力膨胀流可以描述为势的梯度。在这种情况下，不应该产生涡量，但有几种额外的机制可以驱动它的产生。在这里，我们分析的斜压性，旋转和剪切的情况下，粘性流体的影响。这些流动类似于在星际介质中发生的情况。事实上，在这种天体物理环境中，超新星爆炸是主要的流动，在第一近似中，它们可以被视为球形。一个主要的区别是，在我们的数值研究中，我们只研究弱超音速流动，而超新星爆炸是强超音速的。
英文摘要：
A spherical hydrodynamical expansion flow can be described as the gradient of a potential. In that case no vorticity should be produced, but several additional mechanisms can drive its production. Here we analyze the effects of baroclinicity, rotation and shear in the case of a viscous fluid. Those flows resemble what happens in the interstellar medium. In fact in this astrophysical environment supernovae explosion are the dominant flows and, in a first approximation, they can be seen as spherical. One of the main difference is that in our numerical study we examine only weakly supersonic flows, while supernovae explosions are strongly supersonic.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
