Motion of Small Particles in a Three-Dimension Chamber

• Main Authors: Rong-Chang Lian, 連榮昌
• Other Authors: Kaun-Long Shyu
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/77414475752385409039

碩士 === 國立海洋大學 === 造船工程學系 === 83 === Designing of settling tanks of a ship or industrial settling chambers, the motion of small particles in a chamber is a very important factor to be considered. The equations motion of particles in fluid were solved by Runge-Kutta method together with the three dimensional Navier-Stokes equations and continuity equation discretized by using finite difference scheme. The convective terms were discretized by using upwind difference and the viscous terms by using central difference. The empirical drag formula was used to compute the resistance of spherical particles moving in the fluid. Results of numerical simulation showed good agreement with the experimental results [12]. In this study, particles were classified as two types of motion (1) the exhaust type and (2) the adhesion type. Increasing the diameter of particles, decreasing the Reynolds number or decreasing the space between the baffle and the bottom of chamber increases the possibility of adhering particles to the bottom of chamber.