Flow pattern analysis on sticky regime and effectiveness of volume chamber for milk production using CFD method

Abstract

The Computational Fluid Dynamics (CFD) method is used to evaluate the performance of the spray dryer operation in various geometry and operating conditions. Through this method, the design information needed in the cylinder-on-cone spray dryer construction can be obtained. Especially related to the milk drying process. The numerical solution solved through the CFD method using FLUENT ANSYS 19.0 with turbulent model RNG-kε. The spray drying chamber in this study is represented in 2-D geometry. Flow patterns that have strong backflow can cause high particle end temperatures. This flow pattern is created in the small size of space and wide spray angle. The problem that is often caused in the presence of particle deposits on the walls and product agglomeration. The result is particle deposition that often occurs in the walls of the cone and near the atomizer. While agglomeration occurs in the product collection area. The design of the spray drying chamber which is considered the best to be built is a spray dryer with 2 m diameter and spray angle of 60° and 100° in order to produce the final product with the low temperature and water content.