Results 11 to 20 of about 10,368 (265)
AIP Advances, 2022 This study investigates the characteristics of a turbulent boundary layer in a curved circular pipe under an inflow of Ma = 3.0. The pipe consisted of a straight part and a curved part with a turning angle of 36° and a radius of curvature, γ = R/Rc, of γ
Chang-Hai Liang +8 more
doaj +1 more source
A Note on the bottom shear stress in oscillatory planetary boundary layer flow [PDF]
Modeling, Identification and Control, 1988 A simple analytical theory is presented, which describes the motion in a turbulent oscillatory planetary boundary layer near a rough seabed using a two-layer, time-invariant eddy viscosity model.
Dag Myrhaug
doaj +1 more source
Unsteady Motion of Shock Wave for a Supersonic Compression Ramp Flow Based on Large Eddy Simulation
Frontiers in Energy Research, 2022 A large eddy simulation (LES) is conducted to investigate shock wave/turbulent boundary layer interaction in a 24° compression ramp at a high inlet Mach number of Ma=2.9.
Xing Huang +3 more
doaj +1 more source
Journal of Fluid Science and Technology, 2011 Spatial direct numerical simulation results are presented for transitional/turbulent supersonic isothermal flat plate boundary layers at M = 2.0 and impinging shock wave-boundary layer interactions.
Yusuke TOKURA, Hiroshi MAEKWA
doaj +1 more source
Journal of Fluid Science and Technology, 2013 The laminar-turbulent transition of a boundary layer induced by a jet injection in the inlet region of a circular pipe was experimentally investigated.
Masashi ICHIMIYA +3 more
doaj +1 more source
Tracking of vortices in a turbulent boundary layer
Journal of Fluid Mechanics, 2011 AbstractThe motion of spanwise vortical elements and large-scale bulges has been tracked in the outer region between wall-normal distance $z/ \delta = 0. 11$ and 0.30 of a turbulent boundary layer at ${\mathit{Re}}_{\theta } = 2460$. The experimental dataset of time-resolved three-dimensional velocity fields used has been obtained by tomographic ...
Elsinga, Gerrit +5 more
openaire +6 more sources
Minimalist turbulent boundary layer model [PDF]
Physical Review E, 2009 We introduce an elementary model of a turbulent boundary layer over a flat surface, given as a vertical random distribution of spanwise Lamb-Oseen vortex configurations placed over a non-slip boundary condition line. We are able to reproduce several important features of realistic flows, such as the viscous and logarithmic boundary sublayers, and the ...
openaire +3 more sources
Mathematical modeling and the study of exchange processes in disperse boundary layer control actions
Научный вестник МГТУ ГА, 2019 A significant interest of researchers is attracted to the effective management and forecasting of exchange processes in the boundary layer, which are key for the implementation of effective and reliable equipment. Modeling of exchange processes occurring
A. A. Bondarenko +3 more
doaj +1 more source
Boundary layers and turbulence
Physical Oceanography, 1999 We analyze the results of investigation of turbulent boundary layers typical of geophysical objects. It is shown that boundary layers of various nature are self-regulating sustems characterized by relatively slow evolutionary processes of formation accompanied by the growth of instabilities of different types and then replaced by the rapid development ...
E. P. Anisimova, A. A. Speranskaya
openaire +1 more source
Key structure in laminar-turbulent transition of boundary layer with streaky structures
Theoretical and Applied Mechanics Letters, 2019 A numerical simulation is performed to find out a key vortical structure in the laminar-turbulent transition. A low-speed streak is generated inside a laminar boundary layer using an isolated cuboid roughness, aimed at providing an environment unstable ...
Joe Yoshikawa +3 more
doaj +1 more source