Drag cancellation by added-mass pumping

Coulomb drag for strongly localized electrons: a pumping mechanism.

The mutual influence of two layers with strongly localized electrons is exercised though the random Coulomb shifts of site energies in one layer caused by electron hops in the other layer. We trace how these shifts give rise to a voltage drop in the passive layer, when a current is passed through the active layer. We find that the microscopic origin of drag lies in the time correlations of the ...

The Added Mass, Basset, and Viscous Drag Coefficients in Nondilute Bubbly Liquids Undergoing Small-Amplitude Oscillatory Motion

Turbulent Drag Reduction by Spanwise Wall Oscillations

The objective of this paper is to examine the effectiveness of wall oscillation as a control scheme of drag reduction. Two flow configurations are considered: constant flow rate and constant mean pressure gradient. The Navier-Stokes equations are solved using Fourier-Chebyshev spectral methods and the oscillation in sinusoidal form is enforced on the walls through boundary conditions for the sp...

Top and Higgs Mass from Cancellation Conditions

The success of the electroweak gauge theory [1] has led to a great revival of Quantum Field Theory. By this, however, many theorists do not mean a theory of quantized interacting fields [2]. One rather derives observable results from the "Green's functions" specified by Feynman's integration over classical fields [3], All problems are thus reduced to the choice of the action, which then is eval...

On the added mass of rippled discs

The problem of three-dimensional potential flow past a thin rigid screen is reduced to a hypersingular boundary integral equation. This equation is then projected onto a flat reference screen, which is taken to be a circular disc. Solutions are obtained for screens that are axisymmetric perturbations from the disc, so that the screen is rippled concentrically. The added mass is calculated for a...