A Low-Order Thermal Model with a Flow Pattern Similar to Hill's Spherical Vortex

Q4 Earth and Planetary Sciences
Shigeo Takeda, 重夫 武田
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引用次数: 0

Abstract

A thermal model containing time-variable parameters is constructed from an assumed velocity field and density disturbance. The fluid field is similar to Hill's spherical vortex, and the density disturbance is represented by a low-order Hermitian function series. The time variation of the model parameters is estimated by an optimal approximation method for the inviscid and non-diffusive Boussinesq equations. Initially, there is no motion but there is a low-density disturbance in the environment of neutral stratification. The time variation of the model parameters is studied with the aid of numerical integration. The time evolution of this model within a short period seems to be qualitatively comparable with some computer simulation results.
一种流型与希尔球形涡相似的低阶热模型
从假设的速度场和密度扰动出发,构造了含时变参数的热模型。流体场类似于希尔球涡,密度扰动用低阶厄米函数序列表示。采用最优逼近法对无粘非扩散Boussinesq方程估计了模型参数随时间的变化。在中性分层环境中,初始无运动,但存在低密度扰动。利用数值积分法研究了模型参数随时间的变化规律。该模型在短时间内的时间演变似乎与某些计算机模拟结果在质量上具有可比性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Papers in Meteorology and Geophysics
Papers in Meteorology and Geophysics Earth and Planetary Sciences-Geophysics
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