Absence of Evidence for the Ultimate Regime in Two-Dimensional Rayleigh-B\'enard Convection

TL;DR

This paper investigates the existence of an ultimate turbulent regime in two-dimensional Rayleigh-Bénard convection but finds no evidence supporting its presence based on the analyzed data.

Contribution

It provides a critical analysis of prior claims about the ultimate regime, clarifying the absence of evidence in two-dimensional convection.

Findings

No evidence of the ultimate regime in 2D Rayleigh-Bénard convection

Reinforces previous results from Phys. Rev. Lett. 123, 259401 (2019)

Clarifies the limitations of earlier analyses

Abstract

This work is equivalent to that in {\em Phys. Rev. Lett.} {\bf 123}, 259401 (2019), however, Physical Review Letters prohibited reference to the additional two points in the analysis published by Zhu et al., in {\em Phys. Rev. Lett.} {\bf 123}, 259402 (2019).