Numerical and Experimental Investigations of the Cavitating Behavior of an Inducer

A robust CFD model is described, suitable for general three-dimensional flows with extensive cavitation at large density ratios. The model utilizes a multiphase approach, based on volume-scalar-equations, a truncated Rayleigh-Plesset equation for bubble dynamics, and specific numerical modifications (in a finite-volume solution approach) to promote robust solutions when cavitation is present. The model is implemented in the CFD software CFX TASCflow 2.12. The validation of the model was done on an inducer designed and tested at LEMFI. First, The physical model and the numerical aspects are described. Then, the experimental and numerical methodologies, at cavitating regime, are presented. Finally, for several flow rates, the comparisons between experimental and simulated results on the overall performances, head drop and cavitation figures, are discussed. For a range of flow rates, good agreement between experiment and prediction was found

Selenium content in wheat and estimation of the selenium daily intake in different regions of Algeria

In this work, we have measured the selenium content in wheat produced locally in eight different regions of Algeria from east to west, and we have established the annual consumption of selenium for five socio-professional categories. Instrumental neutron activation analysis is used. The selenium levels in wheat samples varied from 21 (Tiaret) to 153 mu g/kg (Khroub), with a mean value about 52 mu g/kg. The mean of selenium daily consumption from ingestion of wheat per person in the eight regions varied from 32 to 52 mu g/day which is close to the minimal FAO recommendation

Personality dimensions could be predictive of quality-of-life outcome after deep brain stimulation of the sub-thalamic nucleus in Parkinson's

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