In air and mist drilling, annular carries are the typical of gas, liquid and solid multiphase flow, and its mechanism and principles are very complicated.
在空气雾化钻井中，井眼环空携岩流动是一种典型的气、液、固多相流动，其机理和规律十分复杂。
2
The results show that the particle size has a core-annular flow pattern in radial position and solid volume fraction is much denser at the bottom of the riser.
结果表明：颗粒在管内呈环—核流动结构，固含率在轴向上呈“上稀下浓”的分布特征。
3
With snail clench solid is on lower shaft, with 2nr/min (N is embroider engine rotate speed) shuttle of rotate speed edge wears the annular slideway C that go up (oriented tine) high speed runs.