Results 221 to 230 of about 33,379 (263)

A void fraction correlation for generalized applications

Progress in Nuclear Energy, 1992
Abstract A void fraction correlation has been developed to cover the full range of pressures, flows, void fractions, and fluid types (steamwater, air-water, hydrocarbons, and oxygen). The correlation, referred to here as the Chexal-Lellouche correlation, has been qualified against several sets of steady-state two-phase/two-component flow test data ...
B. Chexal, G. Lellouche, J. Horowitz, J. Healzer   +3 more
openaire   +1 more source

Development of an ultrasonic void fraction profiler

Measurement Science and Technology, 2009
A method for measuring the spatial distribution of the void fraction in bubbly two-phase flow is presented. The method is referred to as ultrasonic void fraction profiling since it is based on the signal processing of an ultrasonic pulse scattering on a bubble interface.
Yuichi Murai, Shoko Ohta, Akinari Shigetomi, Yuji Tasaka, Yasushi Takeda   +4 more
openaire   +1 more source

Void-fraction reconstruction with stochastic data

Experiments in Fluids, 1994
The technique of computerized tomography has been used earlier to measure point density (or void-fraction) distribution in air-water flows. The interrogation source used in the measurement system was a gamma ray source, Cs-137. The inherent nature of such sources is the Poisson nature of the emmitted radiation.
P. Munshi, M. S. Vaidya
openaire   +1 more source

DETERMINATION OF VOID FRACTION BY IMAGE PROCESSING

2016
Void fraction is one of the key parameters fordefining the characteristics of a two phase flow. However, determination ofvoid fraction is not easy due to changing conditions of flow and the type offluid. In literature, there are plenty of works on determination of voidfraction in two-phase flow in a pipe or channel which uses psychical parametersand ...
DİBEK, Burak, DEMİR, Hakan
openaire   +2 more sources

Analysis of a Microwave Void Fraction Meter

IEEE Transactions on Industrial Electronics and Control Instrumentation, 1975
The eigenvalue problem of an open-ended, dielectric loaded, circular cylindrical resonator is investigated by the boundary value and numerical techniques to compute the volumetric void fraction of gas bubbles in organic oil coolants used in some modern nuclear reactors.
John H. Boyachok, M. A. K. Hamid
openaire   +1 more source

Void Fraction—Empirical Methods

2017
The chapter begins by describing the principles of the various methods available for measuring the void fraction ; these include photographic techniques optical or electrical techniques that produce point measurements of the void fraction , etc. One can obtain point measurements, chordal averages, cross-sectional averages or volume averages in the two ...
openaire   +1 more source

Void fractions in two‐phase flow

AIChE Journal, 1959
AbstractVoid fractions (fraction of the flow cross‐sectional area occupied by the gas phase) have been measured for steam‐water flows in an adiabatic, horizontal test section of 0.484 in. I.D. at 400, 600, 800, and 1,000 1b./sq. in. gauge. A comprehensive survey of void data for two‐phase concurrent flow is included in the paper, and the data ...
H. S. Isbin, H. A. Rodriguez, H. C. Larson, B. D. Pattie   +3 more
openaire   +1 more source

Void Fraction Measurements in a Cavitating Venturi

Journal of Basic Engineering, 1964
A method is described for obtaining precise measurements of local density (or void fraction) in an axially symmetrical cavitating flow regime wherein a heavy fluid as mercury, molten lead, and so on, is used. The method can be adapted to light fluids by substituting a softer radiation source. Significant information regarding the cavitating flow regime
Willy Smith, G. L. Atkinson, F. G. Hammitt   +2 more
openaire   +1 more source

On void fraction and the nature of porous solids

Advanced Materials, 1996
A new unified model of nanoporous materials, based on a relationship between void fraction and structure, is introduced. The reduction of the complex pore system to a single void and the dense framework components t a single dense shell is shown to help in revealing the system of organization determining the structures of materials such as zeolites ...
openaire   +1 more source

The Role of Void Distributions on Void Fraction Measurements

1978
The distribution of voids in a nuclear reactor is of great importance due to their effect on the neutron flux and on the reactor dynamic characteristics in addition to the well known thermohydraulic problems they create. The possibility of using scattered neutrons to measure voids in a liquid flow is investigated experimentally.
openaire   +1 more source