37 citations · 101 across the 23 of their papers we have counts for
23 papers
Nonlinear viscous gravity-capillary surface waves at arbitrary wavelengths
Arash Ghahraman, Gyula Bene
This paper presents the second-order perturbation theory of the Navier-Stokes equations for free surface flows, with the wave amplitude considered as the perturbation parameter. Gr…
Bifurcation Analysis and Propagation Conditions of Free-Surface Waves in Incompressible Viscous Fluids in Finite Depth
Arash Ghahraman, Gyula Bene
Viscous linear surface waves are studied at arbitrary wavelength, layer thickness, viscosity and surface tension. We find that in shallow enough fluids no surface waves can propaga…
Investigating viscous surface wave propagation modes and study of nonlinearities in a finite depth fluid
Arash Ghahraman, Gyula Bene
The object of this study is to investigate the effect of viscosity on propagation of free-surface waves in an incompressible viscous fluid layer of arbitrary depth. While we provid…
Relativistic effects in the chaotic Sitnikov problem
T. Kovács, Gy. Bene, T. Tél
We investigate the phase space structure of the relativistic Sitnikov problem in the first post-Newtonian approximation. The phase space portraits show a strong dependence on the g…
Calculating the Hubble diagram by perturbation theory
Gyula Bene
The effect of density fluctuations upon light propagation is calculated perturbatively in a matter dominated irrotational universe. The starting point is the perturbed metric (seco…
Accelerating expansion in the swisscheese model
Gyula Bene, Adelinda Csapo
A version of the Swiss-cheese model is investigated. The flat Friedmann-Robertson-Walker (FRW) universe is modified by the addition of several spherical regions with Lemaitre-Tolma…