Void-Fraction Measurements in Cavitating Mercury

Void Fraction Disturbances in Bubbly

-The paper is concerned with the flow of dispersions of gas bubbles in liquid, with bubble sizes such that the inertia forces on the bubbles are of importance to the dynamics. One-dimensional conservation equations are derived, which govern the flow when the deviations from the uniform state are small. These are used to describe the features of the propagation of void fraction disturbances, and...

On fiber optic probe hydrophone measurements in a cavitating liquid.

The measurement of high-pressure signals is often hampered by cavitation activity. The usage of a fiber optic probe hydrophone possesses advantages over other hydrophones, yet when measuring in a cavitating liquid large variations in the signal amplitude are found; in particular when the pressure signal recovers back to positive values. With shadowgraphy the wave propagation and cavity dynamics...

ECT and LS-SVM Based Void Fraction Measurement of Oil-Gas Two-Phase Flow

A method based on Electrical Capacitance Tomography (ECT) and an improved Least Squares Support Vector Machine (LS-SVM) is proposed for void fraction measurement of oil-gas two-phase flow. In the modeling stage, to solve the two problems in LS-SVM, pruning skills are employed to make LS-SVM sparse and robust; then the Real-Coded Genetic Algorithm is introduced to solve the difficult problem...

Worldwide atmospheric mercury measurements

Worldwide atmospheric mercury measurements: a review and synthesis of spatial and temporal trends F. Sprovieri, N. Pirrone, R. Ebinghaus, H. Kock, and A. Dommergue Institute of Atmospheric Pollution Research, Rende, Italy GKSS Research Centre, Institute for Coastal Research, Geesthacht, Germany Laboratoire de Glaciologie et Géophysique de l’Environnement, Université Joseph Fourier, Grenoble 1/C...

Development of Capacitance Void Fraction Measurement Method for BWR Test