The paper summarizes the state of the art in aeronautical drag reduction across the speed
range for the “conventional” drag components of viscous drag, drag due to lift and wave …

In this work, we present from first principles a direct numerical simulation DNS of a fully
turbulent channel flow of a dilute polymer solution. The polymer chains are modeled as …

Characteristics of turbulence structure in quasi-2D flows with static and weakly mobile gravel
beds are presented. Three sets of measurements with acoustic Doppler velocimeters in an …

The direct numerical simulation of turbulence (DNS) has become a method of outmost
importance for the investigation of turbulence physics, and its relevance is constantly …

An immersed boundary technique is used to model a riblet covered surface on one wall of a
channel bounding fully developed turbulent flow. The conjecture that the beneficial drag …

No be certain it can is not based mathematics. knowledge if upon da Vinci,(Leonardo 1452
1519) the humankind. Thinking is one greatest of Joys of Galilei,(Galileo 1564 1642) Now I …

In this work, we present the results from direct numerical simulations of the fully turbulent
channel flow of a polymer solution. Using constitutive equations derived from kinetic and …

In many situations involving flows of high Reynolds number (where inertial forces dominate
over viscous forces), such as aircraft flight and the pipeline transportation of fuels, turbulent …

In this paper we describe a force-coupling method for particle dynamics in fluid flows. The
general principles of the model are described and it is tested on three different Stokes flow …

In this work we systematically investigate the effects of the flow elasticity and inertia in
polymer-induced drag reduction through (pseudo) spectral simulations of a turbulent …