Computational Liquid Dynamic Simulation Mixing Time from Side Inlet Mixer Tank
Waktu Pencampuran Simulasi Dinamis Cairan Komputasi dari Tangki Pengaduk Masuk Samping
DOI:
https://doi.org/10.21070/prozima.v5i1.1505Keywords:
Homogenitas, Waktu Pencampuran, Baling-Baling, Side Entry, CFD, Homogeneity, Mixing Time, PropellerAbstract
This study aims to investigate the mixing time of the side-entry mixer tank and the influence of the propeller's rotational speed on mixing time by the Computational Fluid Dynamic (CFD) method. The tank's model is a flat-bottom cylinder tank whose diameter is 40 cm with a 6 cm propeller contains three blades. The tracer, HCL 37%, was injected on the water's surface while the propeller's rotation speed is varied 100 rpm, 200 rpm, 300 rpm, and 400 rpm. The simulation process is examined using CFD FLUENT 17.1, with a turbulence model is k-ɛ RNG. Its conditions are single-phase then proceeded using species transport. Furthermore, the monitoring point's simulation is identical to the experimental data monitoring probe, which is used to inspect the mass fraction at each point. After all, this simulation contains three processes: pre-processing, solving, and post-processing. as a result, the propeller's higher rotational speed makes the mixing time shorter in the CFD method, which has a good agreement with the experimental method. Moreover, this study also examines the impact of the grid's type and the geometric size for the mixing process in the side-entry mixer tank.References
Wu, B., CFD Analysis of Mechanical Mixing in Anaerobic Digesters, Transactions of the ASABE, 52(4), pp. 1371-1382, 2009.
Rahimi, M., The effect of impellers layout on mixing time in a large-scale crude oil storage tank, Journal of Petroleum Science and Engineering, 46(3), pp. 161-170, 2005.
Shu, Z. et al., Optimization Design and Analysis of Polymer High Efficiency Mixer in Offshore Oil Field, Processes, 8(1), pp.110-123, 2020.
Sossa-Echeverria, J. & Taghipour, F., Mixing of Newtonian and Non-Newtonian Fluids in a Cylindrical Mixer Equipped with a Side-Entry Impeller, Industrial & Engineering Chemistry Research, 51(46), pp. 15258-15267, 2012.
Kehn, R. O., Comparing Top Entry Versus Side Entry Agitator Performance in Low Viscosity Blending, The Canadian Journal of Chemical Engineering, 89(5), pp. 1059-1067, 2011.
Rahimi, M. & Parvareh, A., Experimental and CFD investigation on mixing by a jet in a semi-industrial stirred tank, Chemical Engineering Journal, 115(1-2), pp. 85-92, 2005.
Madhania, S. et al., Mixing Behaviour of Miscible Liquid-Liquid Multiphase Flow in Stirred Tank with Different Marine Propeller Installment by Computational Fluid Dynamics Method, Chemical Engineering Transactions, 56(1), pp. 1057-1062, 2017.
Zughbi, H. D. & Rakib, M. A., Mixing in a fluid jet agitated tank: effects of jet angle and elevation and number of jets, Chemical Engineering Science, 59(4), pp. 829-842, 2004.
Wasewar, K. L. and Sarathi, J. V., CFD Modelling and Simulation of Jet Mixed Tanks, Engineering Applications of Computational Fluid Mechanics, 2(2), pp.155-171, 2014.
Kerdouss, F., Two-phase mass transfer coefficient prediction in stirred vessel with a CFD model, Computers & Chemical Engineering, 32(8), pp. 1943-1955, 2008.
Alliet-Gaubert, M., CFD analysis of industrial multi-staged stirred vessels, Chemical Engineering and Processing: Process Intensification, 45(5), PP.415-427, 2006.
Al-Qaessi, F. and Abu-Farah, L., Prediction of Mixing Time for Miscible Liquids by CFD Simulation in Semi-Batch and Batch Reactors, Engineering Applications of Computational Fluid Mechanics, 3(1), PP. 135-146, 2014.
Ristiansyah, N. N., dan Laksono, D. A. Eksperimen Scale-Up Tangki Berpengaduk Samping dengan Propeller, Undergraduate thesis, Chemical Engineering Dept., Sepuluh Nopember Institute of Technology, Surabaya, 2017.
