Analogue black hole spectroscopy; or, how to listen to dumb holes
Analogue black hole spectroscopy; or, how to listen to dumb holes
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模拟黑洞光谱；
DOI：
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发表时间：
2019
影响因子：
3.5
通讯作者：
S. Weinfurtner
中科院分区：
文献类型：
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作者：
Théo Torres;Sam Patrick;Maurício Richartz;S. Weinfurtner
光谱学是科学中的一种基本工具，它研究作为频率函数的系统的响应。在它在物理、生物、化学等领域的众多应用中，通过发射光谱识别物体和结构的可能性是引人注目的和令人难以置信的有用的。本文将光谱学的思想应用于流体力学数值模拟，旨在开发一种新的非侵入式流量测量技术。我们的焦点集中在无旋排水涡旋上，在特定条件下，它可以被视为类似于旋转的黑洞(历史上被称为哑洞)。这篇论文是对最近的一项实验的发展，该实验表明无旋涡和旋转的黑洞共享一个共同的松弛过程，即众所周知的振铃阶段。我们应用从黑洞物理学中借用的技术来识别涡旋流动，从它们在这个环形下降阶段发射的特征光谱中识别出来。我们相信，这项技术是流体-重力类比的一个新方面，并构成了一种在实验上研究流体和超流体中涡旋流动的有前途的方法。
Spectroscopy is a fundamental tool in science which consists in studying the response of a system as a function of frequency. Among its many applications in Physics, Biology, Chemistry and other fields, the possibility of identifying objects and structures through their emission spectra is remarkable and incredibly useful. In this paper we apply the spectroscopy idea to a numerically simulated hydrodynamical flow, with the goal of developing a new, non-invasive flow measurement technique. Our focus lies on an irrotational draining vortex, which can be seen, under specific conditions, as the analogue of a rotating black hole (historically named a dumb hole). This paper is a development of a recent experiment that suggests that irrotational vortices and rotating black holes share a common relaxation process, known as the ringdown phase. We apply techniques borrowed from black hole physics to identify vortex flows from their characteristic spectrum emitted during this ringdown phase. We believe that this technique is a new facet of the fluid-gravity analogy and constitutes a promising way to investigate experimentally vortex flows in fluids and superfluids alike.
影响因子：
2.1
作者：
Duncan A. Brown;K. Vahi;M. Taufer;Von Welch;E. Deelman;Lorena A. Barba;George K. Thiruvathukal
通讯作者：
Duncan A. Brown;K. Vahi;M. Taufer;Von Welch;E. Deelman;Lorena A. Barba;George K. Thiruvathukal