Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The circular jump as a hydrodynamic white hole   Surface waves in classical fluids experience a rich array of black/white hole
horizon effects. The dispersion relation depends on the characteristics of the
fluid as well as on the fluid depth and the wavelength regime. We focus on the
shallow-water regime, and discuss the experimental proof that the circular
hydraulic jump marks the transition between a supercritical and a subcritical
flow regime. This finally confirms a theoretical conjecture formulated by Lord
Rayleigh nearly 100 years ago. It also confirms that the circular jump
corresponds to the spontaneous formation of a hydrodynamic white hole, with
interesting characteristics from the point of view of analogue gravity. We
study the dispersive regime, mention some lessons about the trans-Planckian
issue and describe possible directions for future work.

18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn