Published in Fluid Dynamics
Abstract—The main equations in analytical modeling of turbulence, used in open-channel flows, are the parabolic profile of the eddy viscosity and the exponentially decreasing turbulent kinetic energy function. However, when using the definition of the eddy viscosity as a product between velocity and length scales and by taking the velocity scale as...
Published in Fluid Dynamics
Abstract—A series of the problems of dynamics of a spherical gas cavity with the uniformly distributed pressure inside and, in particular, without pressure are considered within the framework of hydrodynamic theory of incompressible power-law non-Newtonian liquids. A special attention is given to investigation of the behavior of solutions as functi...
Published in Fluid Dynamics
Abstract—The linear hydroelastic problem of the motion of a rectangular external pressure zone over an unbounded ice sheet floating on the fluid surface is considered. The ice sheet is simulated by a thin elastic plate with taking into account the longitudinal, transverse, and shear compressive forces. The external load describes the motion of an a...
Published in Fluid Dynamics
Absract—Approaches for the experimental and numerical study of the distinctive features of fluid flow through media with double porosity that are based on micromodels of porous media and microfluidic technologies are proposed. The optic microscopy and tracer flow visualization methods are used to study experimentally fluid flow through model media....
Published in Fluid Dynamics
Abstract—The relationship between velocity and pressure fluctuations in the near field of a subsonic turbulent jet and at its axis is investigated. The data of the measurements of the velocity fluctuations at the jet axis and the pressure fluctuations in the jet near-field are analyzed. It is shown that the spectral characteristics of the velocity ...
Published in Fluid Dynamics
Abstract—The problem of modeling ablation and energy deposition of cosmic bodies that enter the Earth’s atmosphere at high velocities and disintegrate into numerous fragments is considered. In the first stage the fragments move together with the common bow shock before to go away at a distance which is sufficient in order for individual shock waves...
Published in Fluid Dynamics
Abstract—The methods and results of the mathematical simulation of nonlinear waves generated by hydrodynamic instability in traveling capillary films of a viscous liquid are discussed. Two model systems of differential equations for the local values of the layer thickness h and the fluid flow rate q are considered. The single-parameter (h–q) Kapits...
Published in Fluid Dynamics
Abstract—The possible existence of distinct regimes of barotropic circulation in closed annular channels at the same external parameters governing the flow dynamics is investigated both experimentally and numerically. Transitions between the regimes are realized by means of varying the value of the main parameter determining the velocity field ener...
Published in Fluid Dynamics
AbstractThe aim of this paper is to perform a hydrodynamic analysis of the fluid flow around a symmetrical 3D hydrofoil on the physical laboratory model HM133 and to show the formation of the boundary layer and the separation point on the observed body. The analysis is performed in such a way that the geometric body within the measuring section of ...
Published in Fluid Dynamics
AbstractTo predict the boundary layer transition on swept wings, experimental and numerical researches were conducted to obtained the accurate boundary layer transition front and to evaluate the performance of two transition predicting models. Flow visualization and temperature measurement over a 65° swept wing were carried out under M = 6 with nan...
