Published in Fluid Dynamics
Abstract—Variation in the shape of a magnetizable liquid drop suspended in another immiscible magnetizable liquid in the presence of a non-stationary uniform magnetic field is theoretically investigated in the case of high Reynolds numbers. The system of equations consists of the continuity equation for incompressible liquid, the equation of motion...
Published in Fluid Dynamics
Abstract—Turbulent jet flows at the Mach number equal to 0.25 from an industrial nozzle are studied using the large eddy simulation (LES). The feasibility of controlling the jet flow and noise by using chevrons is explored. A comparative study is carried out between the baseline and chevrons nozzles with the focus paid to the influences of the chev...
Published in Fluid Dynamics
AbstractThe process of flow control in the boundary layer on a swept wing using a span-periodic sequence of plasma actuators mounted at an angle to the leading edge is modeled. The stabilizing effect is investigated as a function of the angle of inclination of the actuators. The calculations of the oscillation component of the controlled flow are p...
Published in Fluid Dynamics
Abstract—The linear and nonlinear stages of disturbance development in the supersonic boundary layer over a 10° expansion corner is investigated numerically within the framework of Navier—Stokes equations for Mach number 3. The effect of sudden flow expansion on the disturbance evolution is analyzed. The flow stabilization effect observable in the ...
Published in Fluid Dynamics
Abstract—The combined effect of leading-edge bluntness and backward-facing step (BFS) is critical because they affect the surface thermal loads and boundary layer transition of hypersonic vehicles, which involves engine design, passive thermal protection and aero-optical effect correction of infrared imaging window. This paper mainly studies heat f...
Published in Fluid Dynamics
Abstract—Significantly inhomogeneous gas flow in the neighborhood of the lower surface of a plain delta wing at an angle of attack in hypersonic stream is considered. The most general case of narrow wing with the bow shock attached to the leading edge or detached from it is studied in the analytical solution of the problem obtained with the use of ...
Published in Fluid Dynamics
AbstractThe one-equation turbulence models by Spalart and Allmaras (SA) and Sekundov et al. (Nut-92) are tested against two compressible two-dimensional flows, namely, the turbulent flat-plate boundary layer at zero pressure gradient and the mixing layer. The boundary layer (BL) approximation is applied to the system of Reynolds equations (RANS). T...
Published in Fluid Dynamics
AbstractStationary nonlinear regimes of electric convection of a low-conductivity fluid in a horizontal capacitor in the gravity field and a constant electric field are studied in the case of unipolar charge injection. In the model considered the density of the charges injected from the cathode is proportional to the electric field strength in the ...
Published in Fluid Dynamics
AbstractThe phenomenon of air core vortexing in liquid draining through cylindrical tanks can have serious adverse effects on many engineering systems. Hence, suppression of such vortices is necessity in these applications. In the present work, the influence of initial rotation on vortexing phenomenon with different drain port configurations with c...
Published in Fluid Dynamics
AbstractAn approximate theory of stationary axisymmetric laminar flow of a viscous incompressible fluid in the entrance region of a circular pipe is presented. It gives correct (within ±2%) calculated values of different physical characteristics of the established flow, which coincide with the known calculated and experimental data. Instead of the ...
