Study of the flow distribution in parallel micro-channels with a triangular manifold

  • Mohammad Ali Zoljalali
  • Elham Omidbakhsh AmiriEmail author
Technical Paper


Flow distribution and pressure drop in parallel micro-channels are two effective parameters on the performance of different devices. These two parameters are affected by different factors, such as the manifold geometry, channels geometry, flow rate and fluid direction of inlet flow. In the present work, the structure of the inlet manifold (the triangular geometry, with straight and curved walls) has been studied as the main subject. However, the effect of the flow rate (as the Reynolds number) and fluid direction of inlet flow has been studied on the flow distribution and pressure drop with these manifold geometries. The results show that in the low-Reynolds number range, with increasing the Reynolds number, the flow distribution does not change, but the pressure drop increases. Also, the vertical direction of the inlet flow in comparison with the horizontal direction is preferable. Flow distribution with triangular manifolds with curved walls is more uniform than with straight walls, while, in straight walls, equilateral triangle is a better choice. At the end of this consideration, the effect of geometry parameters (such as the channel number, channel width and depth of curvature) on the non-uniformity parameter was studied with concave manifolds.


Curvature Triangular manifold Flow distribution Uniformity 



  1. 1.
    Kandlikar S, Garimella S, Li D, Colin SR, King M (2006) Heat transfer and fluid flow in minichannels and microchannels. Elsevier, LondonGoogle Scholar
  2. 2.
    Huang W, Zhu Q (2008) Flow distribution in U-type layers or stacks of planar fuel cells. J Power Sources 178:353–362CrossRefGoogle Scholar
  3. 3.
    Maharudrayya S, Jayanti S, Deshpande AP (2005) Flow distribution and pressure drop in parallel-channel configurations of planar fuel cells. J Power Sources 144:94–106CrossRefGoogle Scholar
  4. 4.
    Wang J (2008) Pressure drop and flow distribution in parallel-channel configurations of fuel cells: U-type arrangement. Int J Hydrogen Energy 33:6339–6350CrossRefGoogle Scholar
  5. 5.
    Choi SH, Shin S, Cho YI (1993) The effect of area ration on the flow distribution in liquid cooling module manifolds for electronic packaging. Int J Heat Mass Transf 20(2):221–234CrossRefGoogle Scholar
  6. 6.
    Ahn H, Lee S, Shin S (1998) Flow Distribution in Manifolds for Low Reynolds Number Flow. KSME Int J IZ 1:87–95CrossRefGoogle Scholar
  7. 7.
    Tonomura O, Tanaka S, Noda M, Kano M, Hasebe S, Hashimoto I (2004) CFD-based optimal design of manifold in plate-fin microdevices. Chem Eng J 101(1–3):397–402CrossRefGoogle Scholar
  8. 8.
    Mohammadi M, Jovanovic GN, Sharp KV (2013) Numerical study of flow uniformity and pressure characteristics within a microchannel array with triangular manifolds. Comput Chem Eng 52:134–144CrossRefGoogle Scholar
  9. 9.
    Pan M, Tang Y, Yu H, Chen H (2009) Modeling of velocity distribution among microchannels with triangle manifolds. Am Inst Chem Eng 55(8):1969–1982CrossRefGoogle Scholar
  10. 10.
    Cho ES, Choi JW, Yoon JS, Kim MS (2010) Modeling and simulation on the mass flow distribution in microchannel heat sinks with non-uniform heat flux conditions. Int J Heat Mass Transf 53(7–8):1341–1348CrossRefGoogle Scholar
  11. 11.
    Pistoresi C, Fan Y, Luo L (2015) Numerical study on the improvement of flow distribution uniformity among parallel mini-channels. Chem Eng Process 95:63–71CrossRefGoogle Scholar
  12. 12.
    Commenge JM, Falk L, Corriou JP, Mat M (2002) Optimal design for flow uniformity in microchannel reactors. AIChE J 48(2):345–358CrossRefGoogle Scholar
  13. 13.
    Pan M, Tang Y, Pan L, Lu L (2008) Optimal design of complex manifold geometries for uniform flow distribution between microchannels. Chem Eng J 137(2):339–346CrossRefGoogle Scholar
  14. 14.
    Najari Sohzabi F, Omidbakhsh Amiri E (2018) Numerical study on the flow distribution uniformity in angled and curved manifolds. Microsyst Technol 24(4):1891–1898CrossRefGoogle Scholar
  15. 15.
    Cho ES, Choi JW, Yoon JS, Kim MS (2010) Experimental study on microchannel heat sinks considering mass flow distribution with non-uniform heat flux conditions. Int J Heat and Mass 53(9–10):2159–2168CrossRefGoogle Scholar
  16. 16.
    Kim S, Choi E, Cho YI (1995) The effect of header shapes on the flow distribution in a manifold for electronic packaging applications. Int Commun Heat Mass 22(3):329–341CrossRefGoogle Scholar
  17. 17.
    Anbumeenakshi C, Thansekhar M (2016) Experimental investigation of header shape and inlet configuration on flow maldistribution in microchannel. Exp Therm Fluid Sci 75:156–161CrossRefGoogle Scholar
  18. 18.
    Kumaran R, Kumaraguruparan G, Sornakumar T (2013) Experimental and numerical studies of header design and inlet/outlet configurations on flow mal-distribution in parallel micro-channels. Appl Therm Eng 58(1–2):205–216CrossRefGoogle Scholar
  19. 19.
    Liu H, Li P, Lew JV (2010) CFD study on flow distribution uniformity in fuel distributors having multiple structural bifurcations of flow channels. Int J Hydrogen Energy 35(17):9186–9198CrossRefGoogle Scholar
  20. 20.
    Liu H, Li P, Lew JV, Juarez-Robles D (2012) Experimental study of the flow distribution uniformity in flow distributors having novel flow channel bifurcation structures. Exp Therm Fluid Sci 37:142–153CrossRefGoogle Scholar
  21. 21.
    Dharaiya V V, Radhakrishnan A, Kandlikar S G (2009) Evaluation of a tapered header configuration to reduce flow maldistribution in minichannels and microchannels. In: 7th international conference on nanochannels, microchannels and minichannels, pp 1–7Google Scholar
  22. 22.
    Holman JP (2011) Experimental methods for engineers, 3rd edn. McGraw-Hill, New YorkGoogle Scholar
  23. 23.
    Griffini G, Gavriilidis A (2007) Effect of microchannel plate design on fluid flow uniformity at low flow rates. Chem Eng Tech 30(3):395–406CrossRefGoogle Scholar
  24. 24.
    Celik IB, Ghia U, Roache PJ, Freitas CJ, Coleman H, Raad PE (2008) Procedure for estimation and reporting of uncertainty due to discretization in CFD applications. J Fluids Eng 130(7):078001-1–078001-4Google Scholar
  25. 25.
    Ali S, Habchi C, Menanteau S, Lemenand T, Harion JL (2015) Heat transfer and mixing enhancement by free elastic flaps oscillation. Int J Heat Mass Transf 85:250–264CrossRefGoogle Scholar
  26. 26.
    Ortega-Casanova J (2017) Application of CFD on the optimization by response surface methodology of a micro mixing unit and its use as a chemical micro reactor. Chem Eng Process: Process Intensif 117:18–26CrossRefGoogle Scholar
  27. 27.
    Ortega-Casanova J (2017) CFD study on mixing enhancement in a channel at a low Reynolds number by pitching a square cylinder. Comp Fluids 145:141–152MathSciNetCrossRefGoogle Scholar
  28. 28.
    Roache PJ (1994) Perspective: a method for uniform reporting of grid refinement studies. J Fluids Eng 116:405–413CrossRefGoogle Scholar

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  • Mohammad Ali Zoljalali
    • 1
  • Elham Omidbakhsh Amiri
    • 1
    Email author
  1. 1.Department of Chemical Engineering, Faculty of EngineeringUniversity of MazandaranBabolsarIran

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