A three-fluid model of the sand-driven flow

✍ Scribed by Liu Dayou; Dong Fei

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 638 KB
• Volume: 17
• Category: Article
• ISSN: 0253-4827
• DOI: 10.1007/bf00123108

✦ Synopsis

The sand-driven flow is studied from the continuum viewpoint in this paper. The crux of this work is how to model the stresses of the particle phase properly. By analyshfg the two-f bald model which usually works in solving gas-particle two-phas#. flow, we find that this model has man)" deficiencies for stud),ing the sand-driven flow, eren for the simplest case --the stead),, two-dimensional fully-developed flow. Considering this, we have proposed the three-fluid model in which the upwardparticles and the downward-particles are regarded as two kinds of fluids respectively. It is shown that the three-fluid model is better than the two-fluid model in reflecting the internal structure of the flow region and tire influence of the boundarysituations on the flow. and it is advantageous to find an approximate solution in that the main components of the particle~phase stresses can be explicitly expressed by those variables in tire three-fluid model In the end. the. governing equations as well as the boundary conditions for the three-fluid model are provided with a discussion.