2026-06-27T23:52:37Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/593422024-09-06T16:55:12Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Li, W. B. author Zhang, K. J. author Sengers, Jan V. author Gammon, R. W. author Ortiz De Zárate Leira, José María author 1998-12-21 We have performed small-angle Rayleigh light-scattering measurements in polymer solutions under various externally applied temperature gradients. Our experiments confirm the existence of an enhancement of the concentration fluctuations. The nonequilibrium concentration fluctuations are proportional to (del T)(2)/k(4), where del T is the applied temperature gradient, and k is the wave number of the fluctuations. The measured strengths of the nonequilibrium fluctuations in the dilute and semidilute concentration regime agree with the strengths calculated from fluctuating hydrodynamics. 0031-9007 10.1103/PhysRevLett.81.5580 https://hdl.handle.net/20.500.14352/59342 http://dx.doi.org/10.1103/PhysRevLett.81.5580 Concentration fluctuations in a polymer solution under a temperature gradient