Turbulent dynamos: Comparison of numerical and experimental results

大量的地球动力学模拟存在，其中地核的流动被模拟为层流或平滑运动。真正的地核流动是未知的，但预计是高度湍流的，这意味着它包含了覆盖广泛长度和时间尺度的漩涡。由于有限的计算机资源，湍流的实际水平是无法用数值计算的。本文提出的研究旨在评估由于忽略湍流而导致的模拟与现实之间的差异。这可以通过比较实验室发电机实验（总是使用非常湍流的流动）和这些实验的数值模拟来实现。

A large number of simulations of the geodynamo exist in which the flow in the Earth's core is modeled as a laminar or smooth motion. The real core flow is unknown but is expected to be highly turbulent, which means that it involves eddies covering a broad range of length and time scales. A realistic level of turbulence is inaccessible numerically because of limited computer ressources. The research proposed here intends to assess the discrepancies between simulation and reality introduced by the neglect of turbulence. This is possible by comparing laboratory dynamo experiments (which always use very turbulent flows) with numerical simulations of these experiments.