{"title":"Behavior of Droplets in Microfluidic System with T-Junction","authors":"A. Guellati, F-M Lounis, N. Guemras, K. Daoud","volume":89,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":1041,"pagesEnd":1045,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9998647","abstract":"
Micro droplet formation is considered as a growing
\r\nemerging area of research due to its wide-range application in
\r\nchemistry as well as biology. The mechanism of micro droplet
\r\nformation using two immiscible liquids running through a T-junction
\r\nhas been widely studied.
\r\nWe believe that the flow of these two immiscible phases can be of
\r\ngreater important factor that could have an impact on out-flow
\r\nhydrodynamic behavior, the droplets generated and the size of the
\r\ndroplets. In this study, the type of the capillary tubes used also
\r\nrepresents another important factor that can have an impact on the
\r\ngeneration of micro droplets.
\r\nThe tygon capillary tubing with hydrophilic inner surface doesn't
\r\nallow regular out-flows due to the fact that the continuous phase
\r\ndoesn't adhere to the wall of the capillary inner surface.
\r\nTeflon capillary tubing, presents better wettability than tygon
\r\ntubing, and allows to obtain steady and regular regimes of out-flow,
\r\nand the micro droplets are homogeneoussize.
\r\nThe size of the droplets is directly dependent on the flows of the
\r\ncontinuous and dispersed phases. Thus, as increasing the flow of the
\r\ncontinuous phase, to flow of the dispersed phase stationary, the size
\r\nof the drops decreases. Inversely, while increasing the flow of the
\r\ndispersed phase, to flow of the continuous phase stationary, the size
\r\nof the droplet increases.<\/p>\r\n","references":"[1] Annie Colin. \"\u00c9coulement de gouttes dans des micro canaux:\r\nsimulations num\u00e9riques et exp\u00e9riences\u201d. Doctorat thesis, Universit\u00e9 de\r\nBordeau 1. France, 2007.\r\n[2] Anna, S. L., Bontoux, N., Stone, H. A. \"Formation of dispersions using\r\n\"flow focusing\u201d in microchannels\u201d. Applied Physics Letters, 2003, 82\r\npp 364-366.\r\n[3] Guillot, P., Colin, A.\"Stability of parallel flows in a microchannel after a\r\nT junction\u201d. Phys. Rev. 2005,E 72 066301.\r\n[4] S. Teychen\u00e9, B. Biscans.\"Crystal nucleation in a droplet based\r\nmicrofluidic crystallizer\u201d. Chemical Engineering Science. 2012, Volume\r\n77, 30, pp 242\u2013248.\r\n[5] Chun-Xia Zhaoa, Anton P.J. Middelberg.\"Two-phase microfluidic\r\nflows\u201d. Chemical Engineering Science.2011, Volume 66, Issue 7, pp\r\n1394\u20131411.\r\n[6] TaotaoFua, b, YouguangMaa, Denis Funfschillingb, Huai Z. Lib..\r\n\"Dynamics of bubble breakup in a microfluidic T-junction divergence\u201d.\r\nChemical Engineering Science. 2011,Volume 66, Issue 18, pp 4184\u2013\r\n4195\r\n[7] Ildefonso, M.; Candoni, N.; Veesler, S., \"A Cheap, Easy Microfluidic\r\nCrystallization Device Ensuring Universal Solvent Compatibility\u201d.\r\nOrganic Process Research & Development.2012, 16, 556-560.\r\n[8] KherratAbderlghani. \"R\u00e9alisation de microchambres d'analyse chimique\r\nmicrocapteurs de pH et microfluidique associ\u00e9s\u201d. Doctorat thesis,\r\nUniversit\u00e9 de Rennes 1. 2012.\r\n[9] Thorsen, et al.. \"Dynamic pattern formation in a vesicle-generating\r\nmicrofluidic device\u201d. Physical review letters, 2001, 86, pp 4163\u20134166.\r\n[10] Chabert Max. \"Microfluidique de gouttes pour les analyses\r\nbiologiques\u201d., Doctorat thesis, Universit\u00e9 Paris VI.2007.\r\n[11] Marcati Alain. \"G\u00e9n\u00e9ration de particules de polym\u00e8res \u00e0 structure\r\ncontr\u00f4l\u00e9e par la microfluidique\u201d. Doctorat thesis, Universit\u00e9 de\r\nToulouse.2009.\r\n[12] Guillot. P. \"Ecoulement de fluides immiscibles dans un canal\r\nsubmillim\u00e9trique: stabilit\u00e9 et application \u00e0 la rh\u00e9ologie\u201d. Doctorat thesis,\r\nUniversit\u00e9 Bordeaux 1.2006\r\n[13] DEBAS H\u00e9l\u00e8ne et al.. \"Etude de la formation des gouttes par micro\r\nPIV\u201d. 18\u00e9me Congr\u00e8s Fran\u00e7ais de M\u00e9canique, Grenoble.2007.\r\n[14] Guillome Aubrey. \"Micror\u00e9sonateurs optiques \u00e0 \u00e9tat liquide et\r\nmicrofluidique digitale. Applications aux lasers \u00e0 colorant en gouttes\r\npour les laboratoires-sur-puce\u201d. Doctorat thesis, Universit\u00e9 Paris\r\nsud.2012.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 89, 2014"}