The distribution of pairwise, relative peculiar velocities, f(u; r), on small nonlinear scales, r, is derived from the Press{Schechter approach. This derivation assumes that Press{Schechter clumps are virialized and isothermal. The virialized assumption requires that the circular velocity, Vc / M , where M denotes the mass of the clump. The isothermal assumption means that the circular velocity...

The distribution of pairwise relative peculiar velocities, f(u;r), on small non-linear scales, r, is derived from the Press{Schechter approach. This derivation assumes that Press{Schechter clumps are virialized and isothermal. The virialized assumption requires that the circular velocity V c / M 1=3 , where M denotes the mass of the clump. The isothermal assumption means that the circular veloc...

Intense pressure and velocity oscillations, as well extensive air entrainment, make the investigation of hydraulic leap created in stilling basins very difficult. Its intricacy, coupled with real-world need for to dissipate energy, puts physical modelling front center. Despite basins' essential role engineering, bibliographic research has often focused primarily on more familiar case classical ...

This paper addresses an open question of how to devise numerical schemes for approximate deconvolution fluid flow models that are efficient, unconditionally stable, and optimally accurate. We propose, analyze and test a scheme for these models that has each of these properties for the case of homogeneous Dirichlet velocity boundary conditions. There are several important components to the deriv...

The one-dimensional motion of N particles in the field of many incoherent waves is revisited numerically. When the wave complex amplitudes are independent, with a gaussian distribution, the quasilinear approximation is found to always overestimate transport and to become accurate in the limit of infinite resonance overlap.