Piezothermal effect in a spinning gas.
Piezothermal effect in a spinning gas.
复制标题
旋转气体中的压热效应。
作者：
V. Geyko;N. Fisch
旋转气体，通过轴向压缩被加热，已知表现出旋转相关的热容。然而，当接近平衡时，在此确定了一种效应，其中温度在径向方向上不均匀地增长，而是在离心势能的最大值处与轴上最热的区域形成温差。这种现象，我们称之为压电效应，示出的压缩率和潜在的振幅双线性增长。数值模拟证实了这种效应的一个简单模型，它可以推广到其他形式的势能和加热方法。
A spinning gas, heated adiabatically through axial compression, is known to exhibit a rotation-dependent heat capacity. However, as equilibrium is approached, an effect is identified here wherein the temperature does not grow homogeneously in the radial direction, but develops a temperature differential with the hottest region on axis, at the maximum of the centrifugal potential energy. This phenomenon, which we call a piezothermal effect, is shown to grow bilinearly with the compression rate and the amplitude of the potential. Numerical simulations confirm a simple model of this effect, which can be generalized to other forms of potential energy and methods of heating.