2018 : CFD study of mixing miscible liquid with high viscosity difference in a stirred tank

Prof.Dr.Ir. Sugeng Winardi M.Eng
Dr. Tantular Nurtono ST., M.Eng.
Suci Madhania ST., MT.


Abstract

The mixing process of miscible liquids with high viscosity difference is crucial role even though the solution mutually dissolved. This paper describes the mixing behaviour of the water-molasses system in a conical-bottomed cylindrical stirred tank (D= 0.28 m and H= 0.395 m) equipped with a side-entry Marine propeller (d= 0.036 m) under the turbulence regime using a three-dimensional and transient CFD-simulation. The objective of this work is to compare the solution strategies was applied in the computational analysis to capture the detail phenomena of mixing two miscible liquid with high viscosity difference. Four solution strategies that have been used are the RANS Standards k-ε (SKE) model as the turbulence model coupled with the Multiple Reference Frame (MRF) method for impeller motion, the RANS Realizable k-ε (RKE) combine with the MRF, the Large Eddy Simulation (LES) coupled with the Sliding …