Flow Mixing Optimisation inside a Manifold using Computational Fluid Dynamics
Keywords:
Manifold, HVAC, CFD, Temperature, Mass Flow Rate, MixingAbstract
This paper presents an analysis of fluid flow in a typical manifold. A commerciallyavailable Computational Fluid Dynamics (CFD) package has been used to analyze the flow pattern inside the manifold. Temperatureand velocity in whole fluid domain and mass flow rate in all the outlets in the manifold have been computed. Based on the preliminary results, a simple modification to inside of the main pipe of the manifold has been incorporated. The performance of the modified design has been compared with the original design from the point of view of average temperature and mass flow rate at the outlets. This simple modification has been shown to improve the uniformity of temperature and mass flow at the outlets, thus enhancing the efficiency of the mixing manifold.
References
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2. Bajura RA. A model for flow distribution in manifolds. ASME Journal of Engineering for Power 1971; 93(1): 7–12. 3. Bajura RA, Jones Jr. EH. Flow distribution manifolds, Journal of Fluids Engineering, Transactions of the ASME, 1976; 98(4): 654–666.
4. Majumdar AK. Mathematical modelling of flows in dividing and combining flow manifold. Applied Mathematical Modelling, 1980; 4(6): 424–432.
5. Bassiouny MK, Martin H. Flow distribution and pressure drop in plate heat exchangers-I U-type arrangement. Chemical Engineering Science 1984; 39(4): 693–700.
6. Bassiouny MK, Martin H. Flow distribution and pressure drop in plate heat exchangers-II Z-type arrangement. Chemical Engineering Science 1984; 39(4): 701–704.
7. Hassan JM, Mohamed TA, Mohamed WS etal. Modelling the Uniformity of Manifold with Various Configurations. Journal of Fluids Engineering 1976; 2014: 18-26.
8. Choi SH, Shin S, Cho YI. The effect of area ratio on the flow distribution in liquid cooling module manifolds forelectronic packaging. International Communications in Heat and Mass Transfer 1993; 20(2): 221–234
9. Choi SH, Shin S, Cho YI. The effects of the Reynolds number and width ratio on the flow distribution inmanifolds of liquid cooling modules for electronic packaging. International Communications in Heat and Mass Transfer 1993; 20(5): 607–617.
10. Kim S, Choi E, Cho YI. The effect of header shapes on the flow distribution in a manifold for electronic packaging applications. International Communications in Heat and Mass Transfer 1995; 22(3): 329–341.
11. Jiao A, Zhang R, Jeong S. Experimental investigation of header configuration on flow maldistribution in plate-fin heat exchanger. Applied Thermal Engineering 2003; 23(10): 1235–1246.
12. Wen J, Li Y, Zhou A. PIV investigations of flow patterns in the entrance configuration of plate-fin heat exchanger. Chinese Journal of Chemical Engineering 2006; 14(1): 15–23.
13. Tong JCK, Sparrow EM, Abraham AP. Geometric strategies for attainment of identical outflows through all of the exit ports of a distribution manifold in a manifold system. Applied Thermal Engineering, 29(17): 3552–3560. 14. Minqiang P, Dehuai Z, Yong T et al. CFD basedstudy of velocity distribution among multiple parallelmicro channels. Journal of Computers 2009; 4(11): 1133-1138.
15. Mathew B, John TJ, Hegab H. Effect of manifold design on flow distribution inmultichanneled microfluidic devices. In Proceedings of the ASME Fluids Engineering Division Summer Conference (FEDSM ’09) 2009: 543548. 16. Chen AW, Sparrow EM. Effect of exit-port geometry on the performance of a flow distribution manifold. AppliedThermal Engineering 2009; 29(13): 2689–2692.
17. Dharaiya VV, Radhakrishnan A, Kandlikar SG. Evaluation of a tapered header configuration to reduce flow maldistributionin minichannels and microchannels. In Proceedingsof the ASME 7th International Conference on Nanochannels, Microchannels and Minichannels (ICNMM 09), 2009.
18. Tong JCK, Sparrow EM, Abraham JP. Attainmentof flowrate uniformity in the channels that link a distri- butionmanifold to a collection manifold. Journal of Fluids Engineering 2007; 129(9): 1186–1192.
19. Huang C, Wang C. The design of uniform tube flow rates for Z-type compact parallel flow heat exchangers. International Journal of Heat and Mass Transfer 2009; 57(2): 608–622.
20. Marquardt DW. An algorithm for least-squares estimationof nonlinear parameters. Journal of Society for Industrial and Applied Mathematics 1963; 11: 431441.
21. Wang CC, Yang KS, Tsai JS et al. Characteristics of flow distribution in compact parallel flow heat exchangers. Part I: typical inlet header. Applied Thermal Engineering 2011;31(16): 3226–3234.
22. Wang CC, Yang KS, Tsai JS et al. Characteristics of flow distribution in compact parallel flow heat exchangers, part II: Modified inlet header. Applied Thermal Engineering 2011; 31(16): 3235–3242.
23. Zeng D, Pan M, Tang Y. Qualitative investigation oneffects of manifold shape on methanol steam reforming forhydrogen production. Renewable Energy 2012; 39(1): 313–322.
24. Jang JY, Huang YX, Cheng CH. The effects of geometric and operating conditions on the hydrogen production performance of a micro-methanol steam reformer, Chemical Engineering Science 2010; 65(20): 5495–5506.
25. Tuo H, Hrnjak P. Effect of the header pressure dropin duced flow maldistribution on the microchannel evaporatorperformance. International Journal of Refrigeration 2013; 36(3): 2176–2186.
26. Kim N, Byun H. Effect of inlet configuration on upward branching of two-phase refrigerant in a parallel flow heatexchanger. International Journal of Refrigeration 2013; 36(3): 1062–1077.
27. Keller JD. The Manifold Problem. Transaction of the ASME 1949; 71: 77-85.
28. Hassan JM, Abdul Razzaq AW, Kamil BK. Flow Distribution in Manifolds. Journal of Engineering and Development 2008; 12(4): 159-177.
29. Subaschandar N, Sakthivel G. Performance Improvement of a Typical Manifold using Computational Fluid Dynamics. MIMT 2016, MATEC Web of Conferences 2016; 54. 11004 DOI: 10.1051/ matecconf/2016 54110 4 (2016) ISSN -2261-236X.
Published
2019-01-23
Issue
Section
Research Article
