منابع مشابه
Multiscale Feature Detection in Unsteady Separated Flows
Very complex flow structures occur during separation that can appear in a wide variety of applications involving flow over a bluff body. This study examines the ability to detect the dynamic interactions of vortical structures generated from a Helmholtz instability caused by separation over bluff bodies at large Reynolds number of approximately 104 based on a cross stream characteristic length ...
متن کاملFully-resolved LES of weakly separated flows
A high-accuracy large eddy simulation (LES) is applied to ows over a sphere and an underwater vehicle. Both objects have relatively weak separated stern ows that may depend upon the accurate resolution of turbulence structures in the attached ow regions upstream of the separation point. For the sphere we compute ows over a range of Reynolds numbers from subto super-critical (Re = 1 10 to Re = 1...
متن کاملNear - wall damping in model predictions of separated flows
Data from the near-wall region of an attached and a separated turbulent boundary layer are used for the development of near-wall damping functions utilized in turbulence modelling. The model considered is an explicit algebraic Rey-nolds stress model. The data are taken from two direct numerical simulations. The turbulent boundary layer equation is analyzed in order to extend the validity of exi...
متن کاملOsmotically driven flows in microchannels separated by a semipermeable membrane.
We have fabricated lab-on-a-chip systems with microchannels separated by integrated membranes allowing for osmotically driven microflows. We have investigated these flows experimentally by studying the dynamics and structure of the front of a sugar solution travelling in 200 microm wide and 50-200 microm deep microchannels. We find that the sugar front travels at a constant speed, and that this...
متن کاملVelocity correlations in dense granular flows.
Velocity fluctuations of grains flowing down a rough inclined plane are experimentally studied. The grains at the free surface exhibit fluctuating motions, which are correlated over a few grain diameters. The characteristic correlation length is shown to depend on the inclination of the plane and not on the thickness of the flowing layer. This result strongly supports the idea that dense granul...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Japan Society for Aeronautical and Space Sciences
سال: 1972
ISSN: 0021-4663
DOI: 10.2322/jjsass1969.20.594