Comparison of Computational Fluid Dynamic Simulation of a Stirred Tank with Polyhedral and Tetrahedral Meshes

Document Type: Research Article

Authors

1 School of Chemical Engineering, Sichuan University, Chengdu 610065, P.R. CHINA

2 Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, P.R. CHINA

3 Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, P.R.CHINA

10.30492/ijcce.2019.34950

Abstract

This work compares the accuracy and calculation efficiency of various tetrahedral and polyhedral meshes in a Computational Fluid Dynamic (CFD) simulation of a stirred tank. The polyhedral mesh was found leading to much fewer mesh cells than the tetrahedral one without missing the calculation accuracy. The CFD numerical simulation results of the polyhedral mesh better agree to the experimental data comparing to the tetrahedral one at the same mesh cell number. In addition, the results of polyhedral mesh were also found to be more accurate than the tetrahedral one which was refined by adaptive meshing based on the velocity gradient.

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Main Subjects


[1] Yang S., Li X., Deng G., Yang C., Mao Z., Application of KHX Impeller in a Low-Shear Stirred Bioreactor, Chinese J. Chem. Eng., 22(10): 1072-1077(2014).
[2] Cortada-Garcia M., Dore V., Mazzei L., Angeli P., Experimental and CFD Studies of Power Consumption in the Agitation of Highly Viscous Shear Thinning Fluids, Chem. Eng. Res. Des., 119: 171-182(2017).
[3] Jafari R., Tanguy P.A., Chaouki J., Experimental Investigation on Solid Dispersion, Power Consumption and Scale-Up in Moderate to Dense Solid-Liquid Suspensions, Chem. Eng. Res. Des., 90(2): 201-212(2012).
[4] Bashiri H., Bertrand F., Chaouki J., Development of A Multiscale Model for The Design and Scale-Up of Gas/Liquid Stirred Tank Reactors, Chem. Eng. J., 297: 277-294(2016).
[5] Waghmare Y., Falk R., Graham L., Koganti V., Drawdown of Floating Solids in Stirred Tanks: Scale-up Study Using CFD Modeling, Int. J. Pharmaceut., 418(2): 243-253(2011).
[7] Bujalski W., Jaworski Z., Nienow A.W., CFD Study of Homogenization with Dual Rushton Turbines—Comparison with Experimental Results: Part II: The Multiple Reference Frame, Chem. Eng. Res. Des., 80(1): 97-104(2002).
[8] Vlček P., Kysela B., Jirout T., Fořt I., Large Eddy Simulation of A Pitched Blade Impeller Mixed Vessel Comparison With LDA Measurements, Chem. Eng. Res. Des., 108: 42-48(2016).
[9] Duan X., Feng X., Yang C., Mao Z.S., Numerical Simulation of Micro-Mixing in Stirred Reactors Using The Engulfment Model Coupled with CFD, Chem. Eng. Sci., 140: 179-188(2016).
[10] Ng K., Fentiman N.J., Lee K.C., Yianneskis M., Assessment of Sliding Mesh CFD Predictions and LDA Measurements of the Flow in a Tank Stirred by a Rushton Impeller, Chem. Eng. Res. Des., 76(6): 737-747(1998).
[11] Cortada-Garcia M., Dore V., Mazzei L., Angeli P., Experimental and CFD Studies of Power Consumption in the Agitation of Highly Viscous Shear Thinning Fluids, Chem. Eng. Res. Des., 119: 171-182(2017).
[13] Gorii M., Bozorgmehry B.R., Kazemeini M., CFD Modeling of Gas-Liquid Hydrodynamicsin a Stirred Tank Reactor, Iran. J. Chem. Chem. Eng. (IJCCE), 26(2): 85-96(2007).
[14] Spiegel M., Redel T., Zhang Y.J., Struffert T., Hornegger J., Tetrahedral Vs. Polyhedral Mesh Size Evaluation on Flow Velocity and Wall Shear Stress for Cerebral Hemodynamic Simulation, Comput. Method. Biomec., 14(1): 9-22(2011).
[15] Ben Diedrichs., Aerodynamic Calculations of Crosswind Stability of a High-Speed Train Using Control Volumes of Arbitrary Polyhedral Shape. "BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano", Italy, July, 20-24 (2008).
[16] Tritthart M., Gutknecht D., Three-Dimensional Simulation of Free-surface Flows Using Polyhedral Finite Volumes, Eng. Appl. Comp. Fluid, 1(1): 1-14 (2007).
[17] Montante G., Moštěk M., Jahoda M., Magelli F., CFD Simulations and Experimental Validation of Homogenisation Curves and Mixing Time in Stirred Newtonian and Pseudoplastic Liquids, Chem. Eng. Sci., 60(8-9): 2427-2437(2005).
[18] Jaworski Z., Bujalski W., Otomo N., Nienow A.W., CFD Study of Homogenization with Dual Rushton Turbines - Comparison with Experimental Results Part I: Initial Studies, Chem. Eng. Res. Des., 78(A3): 327-333(2000).
[19] Zhang Q., Yong Y., Mao Z., Yang C., Zhao C., Experimental Determination and Numerical Simulation of Mixing Time in a Gas-Liquid Stirred Tank, Chem. Eng. Sci., 64(12): 2926-2933(2009).
[20] Joshi J.B., Nere N.K., Rane C.V., Murthy B.N., Mathpati C.S., Patwardhan A.W., Ranade V.V., CFD Simulation of Stirred Tanks: Comparison of Turbulence Models. Part I: Radial Flow Impellers, Can. J. Chem. Eng., 89(1): 23-82(2011).
[21] Joshi J.B., Nere N.K., Rane C.V., Murthy B.N., Mathpati C.S., Patwardhan A.W., Ranade V.V., CFD Simulation of Stirred Tanks: Comparison of Turbulence Models (Part II: Axial Flow Impellers), Multiple Impellers and Multiphase dispersions), Can. J. Chem. Eng., 89(4): 754-816(2011).
[22] Singh H., Fletcher D.F., Nijdam J.J., An Assessment of Different Turbulence Models for Predicting Flow in a Baffled Tank Stirred with a Rushton Turbine, Chem. Eng. Sci., 66(23): 5976-5988 (2011).
[23] Fathi Roudsari S., Turcotte G., Dhib R., Ein-Mozaffari F., CFD Modeling of the Mixing of Water in Oil Emulsions, Comput. Chem. Eng., 45(Supplement C): 124-136 (2012).
[24] Chara Z., Kysela B., Konfrst J., Fort I., Experimental Study of Flow in a Tank Stirred by a Rushton Impeller. "AIP Conference Proceedings" 1648, 030031 (2015).
[25] Chara Z., Kysela B., Konfrst J., Fort I., Study of Fluid Flow in Baffled Vessels Stirred by a Rushton Standard Impeller, Appl. Math. Comput., 272: 614-628 (2016).