Results 271 to 280 of about 135,830 (309)

Measurements of the speed of sound in air-water flows

Chemical Engineering Journal, 1997
Abstract Pressure transducer measurements, recorded while calibrating two conductivity-based, void fraction meters, show how the propagation velocity of pressure waves in bubbly air-water flows varies with void fraction. The results for void fractions between 0 and 0.5 indicate that, as expected, the propagation velocities in an air-water mixture are
P B Whalley
exaly   +2 more sources

Numerical validation of novel scaling laws for air–water flows including compressibility and heat transfer

Journal of Hydraulic Research/De Recherches Hydrauliques, 2023
Air–water flows are among the most important flow types in hydraulic engineering. Their experimental modelling at reduced size using Froude scaling laws introduces scale effects.
Daniele Catucci, Riccardo Briganti, Valentin Heller   +2 more
exaly   +3 more sources

Experimental Investigations of Internal Air-water Flows

, 2015
The objective of the present thesis research is to apply state-of-the-art experimental and data analysis techniques to the study of gas-liquid pipe flows, with a focus on conditions occurring in header-feeder systems of nuclear reactors under different accident scenarios.
Shaban, Hassan
openaire   +3 more sources

Shockwave in air-water flows

International Journal of Multiphase Flow, 1996
Abstract The effect of air-flow on shockwaves is determined both experimentally and analytically. It is found that model observations conducted with pure water flows may be extended to prototype flow with an aerated flow, by accounting for the mixture shock number.
R. Reinauer, W.H. Hager
openaire   +1 more source

Flow induced patterning at the air–water interface

Physics of Fluids, 2003
Patterns on the air–water interface of a swirling cylinder flow are produced via hydrodynamic symmetry-breaking instability of the bulk flow. The patterns are rotating waves breaking the axisymmetry of the system and are longitudinal at the free surface (i.e., not surface deforming).
Miraghaie, R., Lopez, J. M., Hirsa, A. H.   +2 more
openaire   +2 more sources

Air-water flow in bottom outlets

Canadian Journal of Civil Engineering, 2000
Bottom outlets involve high-velocity air-water flow. Depending on the tunnel length, both air entrainment and air detrainment processes are significant. These processes are evaluated using a hydraulic model consisting of a long rectangular tunnel with a bottom slope larger than the critical slope.
Jürg Speerli, Willi H. Hager
openaire   +1 more source

Flow patterns in two-phase air-water flow

International Communications in Heat and Mass Transfer, 1997
Abstract This paper studied the flow patterns transition in two-phase gas-liquid flow and proposed a set of standardised flow pattern terminology though experimental observations. Experiments were conducted in an air-water two-phase system consisting of a horizontal, 10 m long, 25.4 mm diameter pipeline.
T.N. Wong, Y.K. Yau
openaire   +1 more source

Unsteady air?water flow measurements in sudden open channel flows [PDF]

Experiments in Fluids, 2004
Measurements of air-water flow properties are reasonably simple in steady flows, but not so in unsteady flows. Some studies investigated periodic flows in which instantaneous data were averaged over several cycles. During the present work, new unsteady air-water flow measurements were performed in sudden open channel flow surges.
openaire   +2 more sources

Evaluation of Air -- Water Flow in an Evaporative Condenser

2009 3rd Southern Conference on Computational Modeling, 2009
Evaporative condensers present a hard problem fornumerical modeling because of the complex phenomena of heatand mass transfer outside of the bundle tubes in turbulent flows. The goal of this work is to study the air and water behavior inside an evaporative condenser operating with ammonia as the refrigerant fluid.
Ivoni Carlos Acunha Jr., Paulo Smith Schneider   +1 more
openaire   +1 more source

Air-Water Flow Structure in a Circular Dropshaft

World Environmental and Water Resources Congress 2013, 2013
Circular dropshafts, commonly used in urban storm water systems for energy dissipation and flow control, are characterized by significant flow aeration. In the laboratory, a series of experiments were performed in a circular dropshaft having two identical horizontal inflow and outflow circular channels having diameters of d=0.12 m, and a circular drop ...
S. Y. Kumcu, M. A. Kokpinar
openaire   +1 more source