Ortiz de Zárate Leira, José MaríaSengers, Jan V.2023-06-202023-06-202006-01[1] H. Wada, Phys. Rev. E 69, 031202 (2004). [2] T. R. Kirkpatrick, E. G. D. Cohen, and J. R. Dorfman, Phys. Rev. A 26, 995 (1982). [3] B. M. Law and J. C. Nieuwoudt, Phys. Rev. A 40, 3880 (1989). [4] L. Torner and J. M. Rubí, Phys. Rev. A 44, 1077 (1991). [5] J. M. Ortiz de Zárate and J. V. Sengers, Physica A 300, 25 (2001); Phys. Rev. E 66, 036305 (2002). [6] M. Wu, G. Ahlers, and D. S. Cannell, Phys. Rev. Lett. 75, 1743 (1995). [7] J. M. Ortiz de Zárate, F. Peluso, and J. V. Sengers, Eur. Phys. J. E 15, 319 (2004). [8] A. Vailati and M. Giglio, Phys. Rev. Lett. 77, 1484 (1996).1539-375510.1103/PhysRevE.73.013201https://hdl.handle.net/20.500.14352/51241©2006 The American Physical Society.Recently, Wada [Phys. Rev. E 69, 031202 (2004)] presented an analysis of the long-range nature of concentration fluctuations in a binary liquid mixture subjected to a concentration gradient in a uniform shear flow as a function of the wave number k of the fluctuations. Specifically, he argued that the presence of a uniform shear causes the intensity of the concentration fluctuations to crossover from the well-known k(-4) dependence at large wave numbers to a k(-4/3) dependence for small wave numbers. The purpose of this comment is to point out that the wave-number dependence of the concentration fluctuations to be expected in realistic experimental conditions will be affected by gravity and finite-size effects.engjournal articlehttp://dx.doi.org/10.1103/PhysRevE.73.013201http://journals.aps.org/open access536Nonequilibrium FluctuationsEquilibriumFluidTermodinámica2213 Termodinámica