Numerical methods in designing sedimentation equipment
Kołodziejczyk K., Zacharz T.

S u m m a r y
In the paper the authors presented the possibilities of use of the state-of-the-art modeling methods in the field of environment protection. Systems of computer aid in designing processes using the CFD (Computational Fluid Dynamics), based on the finite elements method were presented. Velocity distribution both in the flood system and in the whole settler were simulated using the CFDesign program. Modernization of the flood system shape in order to obtain an even velocity distribution was conducted on the basis of the obtained results. Due to the fact that the basis of settlers operation is the use of sedimentation process, i.e. gravitational sinking of the grains in the continuous medium, and that the process can be considered as one of the most complicated both from the mathematical and simulation point of view, the second package of the FLUENT software, which has much wider possibilities of the one-, two-, and multiphase simulations was presented. It confirms a variety of different domains in which it is used. In the paper the authors wanted to point out that the use of the software helps to eliminate expensive experimental research work at the stage of designing and modernization of machines. It is important to remember that a verification in the laboratory stand is necessary at the end of designing process due to the safety of machine operation.