Based on theories of grains size and dense packing,our research took oil-well cement with high-resistance to sulfur,Jiahua G,and hematite as basic materials and prepared a kind of cement slurry with density varying from 2.

The paper summarizes the formation,movement model of the debris and grain,the condition and mechanism of the oxides formation in the course of thermal wear of the metal composites.

Characteristics Analysis of Forces on Dispersal Particles in Swirling Flow Field;

Study on relationship between microcosmic fractal dimension of cement particles and macroscopical fluidity of cement;

Multi-scale analysis of acoustic emissions and measurement of particle mass flowrate in pipeline;