HWAHAK KONGHAK, Vol.25, No.2, 143-150, April, 1987
크기 및 밀도가 다른 두 입자군으로 구성된 슬러리의 최소수송속도
Minimum Transport Velocity of Bidispersed Slurries with Different Sizes and Densities
초록
수평관을 이용한 침강슬러리의 최소수송속도 상관식을 위하여 침강과 수송조건에서 유체에 대한 입자의 상대운동의 유사성에 기초를 둔 방법이 제시되었다. 이 상관식은 밀도가 다른 균일 입자계에 적용되어 그 가능성이 검토되었으며, 혼합입자 침강이론을 기초로 하여 밀도 및 입도분포를 가지는 혼합슬러리의 수송조건 결정으로 확장되었다. 실험적으로 결정된 종말속도와 각 균일입자군의 부피분율 및 밀도를 알면 혼합입자 최소수송속도는 계산할 수 있으며 실험치와 비교해 본 결과 잘 일치하였다.
A method based on the analogy of a particle motion relative to fluid in settling and transport condition was proposed for the correlation of the minimum transport velocity of settling slurries through horizontal pipes. The correlation was applied to uniform slurries with different density and the applicability was confirmed. Then the method was extended to include the multidispersed slurries with varying solid densities and sizes. This extension was based on a theory of settling for multidispersed slurries.
With experimentally determined settling velocity, density volume fraction of each group of nearly uniform particles, the minimum transport velocity of multidispersed slurries was calculated. Comparison with experimental values for multidispersed slurries with different sizes and densities showed good agreement.
With experimentally determined settling velocity, density volume fraction of each group of nearly uniform particles, the minimum transport velocity of multidispersed slurries was calculated. Comparison with experimental values for multidispersed slurries with different sizes and densities showed good agreement.