Abstract
This paper presents a simple and efficient method for removing gas bubbles from a microfluidic system. This bubble removal system uses a T-junction configuration to generate gas bubbles within a water-filled microchannel. The generated bubbles are then transported to a bubble removal region and vented through a hydrophobic nanofibrous membrane. Four different hydrophobic Polytetrafluorethylene membranes with different pore sizes ranging from 0.45 to 3 μm are tested to study the effect of membrane structure on the system performance. The fluidic channel width is 500 μm and channel height ranges from 100 to 300 μm. Additionally, a 3D computational fluid dynamics model is developed to simulate the bubble generation and its removal from a microfluidic system. Computational results are found to be in a good agreement with the experimental data. The effects of various geometrical and flow parameters on bubble removal capability of the system are studied. Furthermore, gas–liquid two-phase flow behaviors for both the complete and partial bubble removal cases are thoroughly investigated. The results indicate that the gas bubble removal rate increases with increasing the pore size and channel height but decreases with increasing the liquid flow rate.
Similar content being viewed by others
References
Brackbill JU, Kothe DB, Zemach C (1992) A continuum method for modeling surface tension. J Comput Phys 100:335–354
Cheng D, Jiang H (2009) A debubbler for microfluidics utilizing air-liquid interfaces. Appl Phys Lett 95:214103
Damgaard LR, Larsen LH, Revsbech NP (1995) Microscale biosensors for environmental monitoring. J Trends Anal Chem 14(7):300–303
Davies CN (1952) The separation of the airborne dust and particles. In: Proceedings of Institute of Mechanical Engineers B1, London, pp 185–213
Derami HG, Darabi J (2015) Computational and experimental study of gas bubbles removal in a microfluidic system. In: ASME 2015 12th International Conference on Nanochannels, Microchannels, and Minichannels, July 6–9, 2015, San Francisco, California, USA
Drummond JE, Tahir MI (1984) Laminar viscous flow through regular arrays of parallel solid cylinders. Int J Multiph Flow 10(3):515–540
Fei K, Chen TS, Hong CW (2010) Direct methanol fuel cell bubble transport simulations via thermal lattice Boltzmann and volume of fluid methods. J Power Sources 195(7):1940–1945
Fu TT, Ma Y, Funfschilling D, Li HZ (2009) Bubble formation and breakup mechanism in a microfluidic flow-focusing device. Chem Eng Sci 64:2392–2400
Fu TT, Hui X, Zhu C-Y, Ma Y-G, Li H-Z (2011) Formation of dispersed small bubbles in flow-focusing microchannels. J Chem Eng Chin Univ 25:337–340
Fukagata K, Kasagi N, Ua-arayaporn P, Himeno T (2007) Numerical simulation of gas–liquid two-phase flow and convective heat transfer in a micro tube. Int J Heat Fluid Flow 28(1):72–82
Garstecki P, Gitlin I, DiLuzio W, Whitesides GM, Kumacheva E, Stone HA (2004) Formation of monodisperse bubbles in a microfluidic flow-focusing device. Appl Phys Lett 85:2649–2652
Garstecki P, Fuerstman MJ, Stone HA, Whitesides GM (2006) Formation of droplets and bubbles in a microfluidic T-junction-Scaling and mechanism of break-up. Lab Chip 6:437–446
Gobby D, Angeli P, Gavriilidis A (2001) Mixing characteristics of T-type microfluidic mixers. J Micromech Microeng 11:126
Grinstaff MW, Suslick KS (1991) Air-filled proteinaceous microbubbles: synthesis of an echo-contrast agent. Proc Natl Acad Sci 88:7708–7710
Heiszwolf JJ, Kreutzer MT, van den Eijnden MG, Kapteijn F, Moulijn JA (2001) Gas–liquid mass transfer of aqueous Taylor flow in monoliths. Catal Today 69(1–4):51–55
Hirt CW, Nichols BD (1981) Volume of fluid (VOF) method for the dynamics of free boundaries. J Comput Phys 39:201–225
Jaganathana S, Vahedi Tafreshib H, Pourdeyhimia B (2008) A realistic approach for modeling permeability of fibrous media: 3-D imaging coupled with CFD simulation. Chem Eng Sci 63(1):244–252
Johnson M, Liddiard G, Eddings M, Gale B (2009) Bubble inclusion and removal using PDMS membrane-based gas permeation for applications in pumping, valving and mixing in microfluidic devices. J Micromech Microeng 19:095011
Kang S, Zhou B (2014) Numerical study of bubble generation and transport in a serpentine channel with a T-junction. Int J Hydrogen Energy 39(5):2325–2333
Karlsson JM, Haraldsson T, Laakso S, Virtanen A, Maki M, Ronan G, van der Wijngaart W (2011) PCR on a PDMS-based microchip with integrated bubble removal. IEEE 2011:2215–2218
Kreutzer MT, Kapteijn F, Moulijn JA, Kleijn CR, Heiszwolf JJ (2005) Inertial and interfacial effects on pressure drop of Taylor flow in capillaries. AIChE J 51(9):2428–2440
Link DR, Anna SL, Weitz DA, Stone HA (2004) Geometrically mediated breakup of drops in microfluidic devices. Phys Rev Lett 92:545031–545034
Lochovsky C, Yasotharan S, Günther A (2012) Bubbles no more: in-plane trapping and removal of bubbles in microfluidic devices, Lab on a Chip, 12. Issue 3:595–601
Mehling M, Tay S (2014) Microfluidic cell culture. J Curr Opin Biotechnol 25:95–102
Meng DD, Kim J, Kim C-J (2006) A degassing plate with hydrophobic bubble capture and distributed venting for microfluidic devices. J Micromech Microeng 16:419–424
Osher S, Sethian JA (1988) Fronts propagating with curvature dependent speed: algorithms based on Hamilton-Jacobi formulation. J Comput Phys 79(1):12–49
Qian D, Lawal A (2006) Numerical study on gas and liquid slugs for Taylor flow in a T-junction microchannel. Chem Eng Sci 61(23):7609–7625
Quan P, Zhou B, Sobiesiak A, Liu Z (2005) Water behavior in serpentine micro-channel for proton exchange membrane fuel cell cathode. J Power Sources 152:131–145
Shin YS, Cho K, Lim SH, Chung S, Park S-J, Chung C, Han D-C, Chang JK (2003) PDMS-based micro PCR chip with Parylene coating. J Micromech Microeng 13:768–774
Skelley A, Voldman MJ (2008) An active bubble trap and debubbler for microfluidic systems. Lab Chip 8:1733–1737
Sung JH, Shuler ML (2009) Prevention of air bubble formation in a microfluidic perfusion cell culture system using a microscale bubble trap. Biomed Microdev 11(4):731–738
Taha T, Cui ZF (2004) Hydrodynamics of slug flow inside capillaries. Chem Eng Sci 59(6):1181–1190
Taha T, Cui ZF (2006) CFD modelling of slug flow inside square capillaries. Chem Eng Sci 61(2):665–675
Tan J, Li SW, Wang K, Luo GS (2006) Gas–liquid flow in T-junction microfluidic devices with a new perpendicular rupturing flow route. Chem Eng J 146:428–433
Tomadakis MM, Robertson JT (2005) Viscous permeability of random fiber structures: comparison of electrical and diffusional estimates with experimental and analytical results. J Compos Mater 39(2):163–188
Tsai JH, Lin L (2002) Active microfluidic mixer and gas bubble filter driven by thermal bubble micropump. J Sens Actuators 97–98:665–671
Vundavilli R, Darabi J (2014) Bubble removal in microfluidic devices using nanofibrous membranes, FEDSM2014-21616. In: Proceedings of the ASME 2014 4th Joint US-European fluids engineering division summer meeting and 12th international conference on Nanochannels, Microchannels, and Minichannels FEDSM2014 August 3–7, 2014, Chicago, Illinois, USA
Xiong R, Bai M, Chung JN (2007) Formation of bubbles in a simple co-flowing micro-channel. J Micromech Microeng 17:1002–1011
Xu JH, Li SW, Chen GG, Luo GS (2006) Formation of monodisperse microbubbles in a microfluidic device. AIChE J 52:2254–2259
Xu J, Vaillant R, Attinger D (2010) Use of a porous membrane for gas bubble removal in microfluidic channels: physical mechanisms and design criteria. Microfluid Nanofluid 9(4–5):765–772
Yuan Z, Zhang Y, Li Z, Zhao Y, Liu X (2014) Investigation of mass transport and cell performance on µDMFC with different anode flow fields. Int J Energy 38:139–150
Zhu X (2009) Micro/nanoporous membrane based gas–water separation in microchannel. Microsyst Technol 15(9):1459–1465
Acknowledgments
This work was partially supported by a RGGS Grant from the SIUE Graduate School.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Derami, H.G., Vundavilli, R. & Darabi, J. Experimental and computational study of gas bubble removal in a microfluidic system using nanofibrous membranes. Microsyst Technol 23, 2685–2698 (2017). https://doi.org/10.1007/s00542-016-3020-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00542-016-3020-2