Mechanism of Off—Bottom Suspension of Solid Particles in a Mechanical Stirred Tank
Mechanism of Off—Bottom Suspension of Solid Particles in a Mechanical Stirred Tank
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DOI：
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发表时间：
2002
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影响因子：
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通讯作者：
BAOYuyun;HUANGXiongbin
中科院分区：
文献类型：
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作者：
BAOYuyun;HUANGXiongbin
The minimum fluid velocity to maintain particles just suspended was deduced,and the theoretical analysis shows that the minimum velocity is influenced by the properties of the solid and liquid,not by the operational conditions. For justification,the local minimum velocity at the bottom of the tank was measured by a bi-electrode conductivity probe,in a square-sectioned stirred tank (0.75m×0.75m×1.0m) with the glass beads-water system. The experiments showed that the fluid velocities for the same suspension state were identical despite that the power dissipated per unit mass was not the same under different configuration and operation.Both theoretical analysis and experimental results indicate that the off-bottom suspension is controlled by the local fluid flow over the bottom of the stirred tank.
