International Journal of Advanced Studies in Computer Science and Engineering

Open Access Open Access  Restricted Access Subscription Access

Numerical Investigation into Mixing Efficiency of T-Micromixers with Elliptic Barriers


Affiliations
1 Mechanical Department, Ziane Achour University, 17000 Djelfa, Algeria
2 Gas Turbine Joint Research Team, Ziane Achour University, 17000 Djelfa, Algeria
3 Department of Electrical Engineering, Ziane Achour University, 17000 Djelfa, Algeria
 

This paper proposes a numerical study of the heat transfer and mixing properties of two liquid samples in a two-dimensional T- microchannel with and without elliptic barriers. The effects of various parameters such as mixing efficiency and thermal mixing efficiency and performance index, pressure drop have been analyzed and compared, at Reynolds numbers ranging from 5 to 500. The vortical structure of the flow is examined too. Modeling was performed for laminar flow using the CFD code with water/Al2O3 nanofluid at two volume fractions, base fluid (𝝋=0%) and nanofluid (𝝋=0.5%), and Three cases were chosen and simulated. The results indicated that adding elliptic barriers can enhance the mixing efficiency greater than 80%, performed considerably fine and had a very good quality of performance compared to the standard T-mixer with the cost of a higher pressure drop.

Keywords

T-Microchannel, Elliptic Barriers, Mixing Efficiency, Performance Index, Thermal Mixing, Pressure Drop
User
Notifications
Font Size

  • L. Cortelezzi, S. Ferrari, G. Dubini, A scalable active micro-mixer for biomedical applications, Microfluid. Nanofluid. 21 (2017) 31.

  • X. Chen, Z. Zhao , Numerical investigation on layout optimization of obstacles in a threedimensional passive micromixer, Anal. Chim. Acta 964 (2017) 142–149 [3] Lee, C. Y.; Chang, C. L.; Wang, Y. N.; Fu, L. M., Microfluidic Mixing: A Review. Int J Mol Sci 2011, 12 (5), 3263-3287.

  • D. Gobby, P. Angeli, A. Gavriilidis, Mixing characteristics of T-type microfluidic mixers, Journal of Micromechanics and Micro engineering, 11 (2001) 126-132.

  • S.H. Wong, M.C.L. Ward, C.W. Wharton, Micro T-mixer as a rapid mixing micromixer, Sensors and Actuators B: Chemical, 100 (2004) 359-379.

  • M. Engler, N. Kockmann, T. Kiefer, P. Woias, Numerical and experimental investigations on liquid mixing in static micromixers, Chemical Engineering Journal, 101(2004) 315-322.

  • Y. Ming qiang and H.H. Bau: Proc. ASME Intl. Mechanical Engineering Congress and Expositio, MEMS 2000 Vol. 2 (2000), p. 489.

  • Bothe, D., Stemich, C., Warnecke, H.J., 2006. Fluid mixing in a T-shaped-mixer. Chem. Eng. Sci. 61, 2950–2958.

  • Soleymani, A., Kolehmainen, E., Turunen, I., 2008.Numerical and experimental investigations of liquid mixing in T-type micromixers Chem. Eng.J.135,219–228.

  • T. ManojDundi,V. Raju, V.P. Chandramohan, Characterization of mixing in an optimized designed T–T mixer with cylindrical elements. CJChE-01404;No of Pages 15.

  • Hoffmann M., Schluter M., Rubiger N. Experimental investigation of fluid–fluidmixing inT-shaped micro-mixers using μ-LIF and μ-PIV // Chem. Eng. Sci., 2006. Vol. 61. Is. 9.Pp. 2968- 2976

  • Dreher S., Kockmann N., Woias P. Characterization of laminar transient flow regimes and mixing in T-shaped micro-mixers // Heat Trans. Eng., 2009. Vol. 30. Is. 1-2. Pp. 91- 100

  • Lobasov,A. S. Shebeleva. Initial temperatures effect on the mixing efficiency and flow modes in T-shaped micromixer IOP Conf. Series: Journal of Physics: Conf. Series, 2017, Vol. 899, art. no. 022010.

  • H. Wang, P. Iovenitti, E. Harvey, S. Masood, Optimizing layout of obstacles for enhanced mixing in microchannels, Smart Materials and Structures, 11 (2002) 662-667.

  • C.A. Cortes-Quiroz, A. Azarbadegan, E. Moeendar bary, An efficient passive planar micromixer with fin-shaped baffles in the tee channel for wide Reynolds number flow range, World Academy of Science, Engineering and Technology, 61 (2010) 170-175.

  • M. Sattari-Najafabadi, M.N. Esfahany , Z. Wu , B. Sunden , Mass transfer between phases in microchannels: A review, Chem. Eng. Process. 127 (2018) 213–237.

  • A.D. Stroock , S.K. Dertinger , A. Ajdari , I. Mezi ´c , H.A. Stone , G.M. Whitesides , Chaotic mixer for microchannels, Science 295 (5555) (2002) 647–651 .

  • G. Xia, J. Li, X. Tian and M. Zhou, Analysis of Flow and Mixing Characteristics of Planar Asymmetric Split-and-Recombine (P-SAR) Micromixers with Fan-Shaped CavitiesInd. Eng. Chem. Res. 51, 7816 (2012).

  • J. Li, G. Xia and Y. Li,Numerical and experimental analyses of planar asymmetric split-and-recombine micromixer with dislocation sub-channels J. Chem. Technol. Biotechnol. 88, 1757 (2013).

  • A.A.S. Bhagat, E.T. Peterson and I. Papautsky,A passive planar micromixer with obstructions for mixing at low Reynolds numbers, J. Micromech. Microeng. 17, 1017 (2007).

  • S.B. Islami, B. Dastvareh, R. Gharraei, Numerical study of hydrodynamic and heat transfer of nanofluid flow in microchannels containing micromixer, Int. Commun. Heat Mass Transfer. 43, 146 (2013).

  • S.S. Wangikar, P.K. Patowari, R.D. Misra, Numerical and experimental investigations on the performance of a serpentine microchannel with semi circular obstacles, Microsyst. Technol. 24 (2018) 3307–3320.

  • Z. Xu, C. Li, D. Vadillo, X. Fu, Numerical simulation on fluid mixing by effects of geometry in staggered oriented ridges micromixers, Sensors Actuators, B Chem.153(2011) 284–292.

  • K.J. Cook, Y. Fan, I. Hassan, Mixing Evaluation of a Passive Scaled-Up Serpentine. Micromixer with Slanted Grooves, J. Fluids Eng. 135 (2013) 081102.

  • I. Sabotin, G. Tristo, M. Junkar and J. Valentincic, Two-step design protocol for patterned groove micromixers Chem. Eng. Res. Des. 91, 778 (2013).

  • C.Y. Wu and R.T. Tsai, Fluid mixing via multidirectional vortices in converging– diverging meandering microchannels with semielliptical side walls Chem. Eng. J. 217, 320 (2013).

  • M. Mansour, Z. Liu, G. Janiga, K.D.P. Nigam, K. Sundmacher, D. Thévenin, K. Zähringer, Numerical study of liquid-liquid mixing in helical pipes, Chem. Eng. Sci.172(2017) 250– 261.

  • S. Hossain, I. Lee, S.M. Kim, K. Kim, A micromixer with two-layer serpentine crossing channels having excellent mixing performance atlow Reynolds numbers, Chem. Eng. J.327 (2017) 268–277.

  • D. Kang, Effects of Baffle Configuration on Mixing in a T-Shaped Micro-Channel, Micromachines. 6 (2015) 765–777.

  • D.S. Kim, I.H. Lee, T.H. Kwon and D.W. Cho: Journal of Micromechanics and Micromachining. Vol. 14 (2004), p. 1294

  • A. Haghighinia, S. Movahedirad , A K Rezaei , N. Mostoufi, On-chip mixing of liquids with high-performance embedded barrier structure. International Journal of Heat and Mass Transfer 158 (2020) 119967.

  • T. Matsunaga, K. Nishino, Swirl-inducing inlet for passive micromixers, RSC Advances, 4 (2014) 824-829.

  • X.Chen, Z. Zhang, D. Yi, Z.Hu. Numerical studies on different two-dimensional micromixers basing on a fractal-like tree network. Microsyst. Technol. 23, 755 (2017).

  • Y. Lee, F. Lin, M. Hung, R.Ma, C.Tsai, H. Lin, and L. Fu, Experimental and Numerical Investigation into Mixing Efficiency of Micromixers with Different Geometric Barriers. Materials Science Forum Vols. 505- 507 (2006) pp. 391-396.

  • P.V. Danckwerts, The definition and measurement of some characteristics of mixtures,Applied Scientific Research, 3 (1952) 279-296.

  • R.Tsai, C.Wu, Multidirectional vortices mixing in three-stream micromixers with two inlets, Microsyst Technol (2012) 18:779–786.

  • Ranjitsinha R. Gidde. On the computational analysis of short mixing length planar split and recombine micromixers for microfluidic applications. Inter. Journal of Environmental Analytical Chemistry, ISSN: 0306-7319 (Print) 1029-0397.

  • Hsien-Hung Ting and Shuhn-Shyurng Hou. Numerical Study of Laminar Flow Forced Convection of Water-Al2O3Nanofluidsunder Constant Wall Temperature Condition. Mathematical Problems in Engineering Volume 2015, Article ID 180841.

  • J.Kurnia, A. Sasmito. Performance Evaluation of Liquid Mixing in a T-Junction Passive Micromixer with a Twisted Tape Insert. Ind. Eng. Chem. Res. 2020, 59, 3904−3915.

  • R. Tsai , C. Wu. An efficient micromixer on Mixing based on multidirectional vortices due to baffles and channel. Biomicrofluidics 5, 014103 (2011).


Abstract Views: 136

PDF Views: 90




  • Numerical Investigation into Mixing Efficiency of T-Micromixers with Elliptic Barriers

Abstract Views: 136  |  PDF Views: 90

Authors

A. Mahammedi
Mechanical Department, Ziane Achour University, 17000 Djelfa, Algeria
M. Telha
Mechanical Department, Ziane Achour University, 17000 Djelfa, Algeria
T. T. Naas
Gas Turbine Joint Research Team, Ziane Achour University, 17000 Djelfa, Algeria
A. Amari
Department of Electrical Engineering, Ziane Achour University, 17000 Djelfa, Algeria

Abstract


This paper proposes a numerical study of the heat transfer and mixing properties of two liquid samples in a two-dimensional T- microchannel with and without elliptic barriers. The effects of various parameters such as mixing efficiency and thermal mixing efficiency and performance index, pressure drop have been analyzed and compared, at Reynolds numbers ranging from 5 to 500. The vortical structure of the flow is examined too. Modeling was performed for laminar flow using the CFD code with water/Al2O3 nanofluid at two volume fractions, base fluid (𝝋=0%) and nanofluid (𝝋=0.5%), and Three cases were chosen and simulated. The results indicated that adding elliptic barriers can enhance the mixing efficiency greater than 80%, performed considerably fine and had a very good quality of performance compared to the standard T-mixer with the cost of a higher pressure drop.

Keywords


T-Microchannel, Elliptic Barriers, Mixing Efficiency, Performance Index, Thermal Mixing, Pressure Drop

References