Results 211 to 220 of about 18,374 (266)

Optical flow estimation in aerated flows

Journal of Hydraulic Research/De Recherches Hydrauliques, 2016
ABSTRACTOptical flow estimation is known from Computer Vision where it is used to determine obstacle movements through a sequence of images following an assumption of brightness conservation. This paper presents the first study on application of the optical flow method to aerated stepped spillway flows.
Daniel B Bung, Daniel Valero
exaly   +4 more sources

Effects of aeration patterns on the flow field in wastewater aeration tanks

Water Research, 2011
Due to the high energy input of aeration, the spatial distribution of air diffusers largely determines the flow field in aeration tanks. This has consequences on the efficiency of the aeration system, the performance of the aeration tank and on tank operation and control.
Gresch M, Armbruster M, Braun D, Gujer W
openaire   +3 more sources

The Characterisation of the Flow of Aerated Powders

Particle & Particle Systems Characterization, 1986
AbstractThis paper reviews the development of a new annular shear cell for the characterisation of aerated powders. The cell enables the measurement of the transmitted shear stress at degrees of aeration below fluidisation. Results are presented for three powders, Alumina, Phosphate Rock and Sodium Carbonate.
Philip J. Lloyd, Peter J. Webb
openaire   +1 more source

Flow processes in aerated silos

Powder Technology, 1975
Abstract To obtain an insight into the complicated processes in aerated silos, experimental results are given which were obtained using a plane model. The flow of solid material, the excess pressure, the boundary lines between the moving and static material, the distribution of the flow and the air velocity profile at the aerated floors were ...
Hans Peter Kurz, Hans Rumpf
openaire   +1 more source

Characteristics of Self-Aerated Flows

Journal of the Hydraulics Division, 1970
Characteristics of self-aerated flows in open channels are studied by dividing the flow into two zones: (1) wall turbulent zone; and (2) free turbulent zone. Theoretical equations developed for air concentration and velocity in the free turbulent zone, starting from the basic equations of motion and continuity are checked with experiments conducted in ...
Nagar S. Lakshmana Rao, Kyatasandra Seetharamiah, Thimmaiah Gangadharaiah   +2 more
openaire   +1 more source

Instrumentation for Aerated Flow on Spillways

Journal of the Hydraulics Division, 1981
Instruments that have been used for measuring air concentration and velocities in self-aerated flow are examined. For air concentration measurements it is shown that the conductivity probe is satisfactory. For the velocity measurement the concentration measurements together with a pressure cell measuring the total head was attempted but the ...
Paul Cain, Ian R. Wood
openaire   +1 more source

Modeling the Aeration Efficiency of a Passively Aerated Vertical-Flow Biological Filter

Journal of Environmental Engineering, 2007
A model aimed at calculating the aeration efficiency of a passively aerated biological vertical bed unit is presented. The model allows the calculation of the mass of air that would flow via convection into the vertical bed, therefore enabling the prediction of the maximal capacity of the bed as an aerobic biological reactor.
Yuval Alfiya, Michal Green, Ori Lahav
openaire   +1 more source

Developing Region in Self-Aerated Flows

Journal of the Hydraulics Division, 1974
The results of two independent research programs are combined. The first investigation was a study of the effect of aeration on the spillway flow of a large dam; the second, a study of the region of developing self-aerated flow in a model flume. Using the model data as a basis, an analysis of the developing region is presented, in which the aerated ...
Robert J. Keller, K. K. Lai, Ian R. Wood
openaire   +1 more source