Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Nikolaos Beratlis"'
Publikováno v:
Journal of Fluid Mechanics. 879:147-167
It is well established that dimples accelerate the drag crisis on a sphere. The result of the early drag crisis is a reduction of the drag coefficient by more than a factor of two when compared to a smooth sphere at the same Reynolds number. However,
Publikováno v:
Journal of Fluid Mechanics. 904
Flow pulsatility is ubiquitous in biological and biomedical fluid dynamics. Cardiovascular flow, the most well-studied pulsatile flow, has benefited from decades of fundamental studies of the temporal influences of basic parameter changes in simplifi
Autor:
Roi Gurka, Nikolaos Beratlis, Elias Balaras, Francesco Capuano, Kyle D. Squires, Krishnamoorthy Krishnan
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Universitat Politècnica de Catalunya (UPC)
SynopsisThe fluid dynamics of owls in flapping flight is studied by coordinated experiments and computations. The great horned owl was selected, which is nocturnal, stealthy, and relatively large sized raptor. On the experimental side, perch-to-perch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b415210e4b43462415c963350f68b75
http://hdl.handle.net/2117/359140
http://hdl.handle.net/2117/359140
Publikováno v:
International Journal of Heat and Fluid Flow. 73:223-235
In the present work the effects of different types of roughness elements on flow separation over a circular bump is investigated by means of direct numerical simulations. Two types of roughness elements are considered, dimples and spherical beads. Th
Publikováno v:
Journal of Turbulence. 15:611-627
A series of direct numerical simulations of the flow past a flat plate with two and eight rows of dimples in a staggered arrangement is carried out. The Reynolds number based on the boundary layer thickness and freestream velocity near the inflow pla
Publikováno v:
Journal of Fluid Mechanics. 587:425-451
A combined experimental and numerical study of transitional pulsatile flow through a planar constriction is presented. The parametric space that we adopt is similar to the one reported in a variety of past experiments relevant to the flow through ste
Publikováno v:
Journal of Biomechanical Engineering. 127:1147-1157
In the present paper, a closely coupled numerical and experimental investigation of pulsatile flow in a prototypical stenotic site is presented. Detailed laser Doppler velocimetry measurements upstream of the stenosis are used to guide the specificat
Publikováno v:
Physics of Fluids. 28:035112
The transition from laminar to turbulent flow over dimples and grooves has been investigated through a series of direct numerical simulations. Emphasis has been given to the mechanism of transition and the momentum transport in the post-dimple bounda
Publikováno v:
Scopus-Elsevier
In order to understand the role of surface dimpling on the flow over a golf ball, direct numerical simulations (DNS) are conducted within the framework of an immersed boundary approach for two physical regimes. Computations of the flow over a non-rot