Proceedings of the National Academy of Sciencesâ€¦

1975

Brownian motion (diffusion) of particles in membranes occurs in a highly anisotropic environment. For such particles a translational mobility (independent of velocity) can be defined if the viscosityâ€¦ (More)

The structure of the intense-vorticity regions is studied in numerically simulated homogeneous, isotropic, equilibrium turbulent flow fields at four different Reynolds numbers, in the range Re, =â€¦ (More)

The steady-state shape of a finger penetrating into a region filled with a viscous fluid is examined. The two-dimensional and axisymmetric problems are solved using Stokes equations for low Reynoldsâ€¦ (More)

The drag on a cylindrical particle moving in a thin sheet of viscous fluid is calculated. It is supposed that the sheet is embedded in fluid of much lower viscosity. A finite steady drag is obtained,â€¦ (More)

The strained-spiral vortex model of turbulent fines scales given by Lundgren [Phys. Fluids 25, 2193 ( 1982)] is used to calculate vorticity and velocity-derivative moments for homogeneous isotropicâ€¦ (More)

Homogeneous anisotropic turbulence consisting of a collection of straight vortex structures is considered, each with a cylindrically unidirectional, but otherwise arbitrary, internal vorticity field.â€¦ (More)

The three-dimensional linear stability of a rectilinear vortex of elliptical cross-section existing as a steady state in an irrotational straining field is studied numerically in the case of finiteâ€¦ (More)

where E ( K ) is the energy spectrum function, K is the wave-number magnitude, and C is a positive number which is not in general zero. The corresponding forms of the velocity covariance spectralâ€¦ (More)