TY - JOUR ID - 90044 TI - CFD Study of Concave Turbine JO - Iranian Journal of Chemical Engineering(IJChE) JA - IJCHE LA - en SN - 1735-5397 AU - Sinkakarimi, A. AU - Ghadi, A. AD - bYoung Researchers and Elite Club, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran. AD - Young Researchers and Elite Club, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran. Y1 - 2019 PY - 2019 VL - 16 IS - 2 SP - 103 EP - 118 KW - Concave blade KW - Rushton turbine KW - Power Consumption KW - Mixing time KW - Optimum impeller DO - N2 - Computational fluid dynamics (CFD) is a powerful numerical tool that is becoming widely used to simulate many processes in the industry. In this work study of the stirred tank with 7 types of concave blade with CFD was presented. In the modeling of the impeller rotation, sliding mesh (SM) technique was used and RNG-k-ε model was selected for turbulence. Power consumption in various speeds in the single phase, mean tangential, radial and axial velocities in various points, effects of disc diameter and thickness and mixing time were investigated. The optimum concave impeller was selected and the effect of tracer feed position and probe location was investigated on it. Results suggested that power consumption is exactly depending on impellers scale and geometry, was in a good agreement with the experimental data and in turbulent flow is relatively independent of Reynolds number. Power number increases with increasing disc diameter for both concave and Rushton and concave´s power is relatively independent on disc thickness but increasing it decreases Rushton´s power. The data revealed that the power number was 2.3±0.3 for blade angle 40° whereas for blade 25°, 50° and 55° respectively 43% lower and 57% and 43% higher. UR - https://www.ijche.com/article_90044.html L1 - https://www.ijche.com/article_90044_336fdd21c40949cbed70cc00888370fa.pdf ER -