General aspects of the Fluctuation–Dissipation Relation (FDR), and Response Theory are
considered. After analyzing the conceptual and historical relevance of fluctuations in …

For the last several decades, renormalization group (RG, or RNG) methods have been
applied to a wide variety of problems of turbulence in hydrodynamics and plasma physics. A …

The pioneering applications of the methods of theoretical physics to the turbulence statistical
closure problem are summarised. These are: the direct-interaction approximation (DIA) of …

A statistical closure of the Navier–Stokes hierarchy which leads to equations for the two-
point, two-time covariance of the velocity field for stationary, homogeneous isotropic …

Qian (Tsien) Jian (1939–2018), a Chinese theoretical physicist and fluid dynamicist, devoted
the second part of his scientific life to the physical understanding of small-scale turbulence to …

The formalisms of Wyld [Ann. Phys. 14, 143 (1961) APNYA6 0003-4916 10.1016/0003-4916
(61) 90056-2] and Martin, Siggia, and Rose (MSR)[Phys. Rev. A 8, 423 (1973) PLRAAN …

We show how a general formulation of the Fluctuation-Response Relation is able to
describe in detail the connection between response properties to external perturbations and …

Drag reduction by polymer additives from turbulent spectra Page 1 Drag reduction by polymer
additives from turbulent spectra Esteban Calzetta* Departamento de Física, FCEN …

A technique for measuring the mean impulse response function of stationary homogeneous
isotropic turbulence is proposed. Such a measurement is carried out here on the basis of …

We use the 2 particle irreducible Schwinger-Keldysh effective action to set up consistent
equations for the velocity and pressure correlations of a turbulent flow. We use these …