Numerical Simulation of Flow in Sedimentation Tanks

• Main Authors: Teng-I Feng, 馮騰儀
• Other Authors: C. B. Liao
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/b6wa9d

碩士 === 逢甲大學 === 土木及水利工程所 === 90 === A numerical model is presented for simulating the flow field and settling performance of sedimentation tanks. In the numerical model, the turbulence flow field and suspended solids concentration distribution are taken care by the Navier-Stokes equations and the suspended concentration equation. A large eddy simulation is applied to turbulence model. An explicit Adams-Bashforth scheme is adopted to solve the velocity field. The projection method is used to derive the pressure Poisson equation such that the equation of continuity satisfies automatically. We can find a recirculation region very close to the inlet in numerical simulation. It is well agreeable with the previous study. The numerical model can provide us some useful results in sedimentation tanks design.