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Experimental observations of flow structures during DEP controlled boiling in a microchannel

Treść / Zawartość
Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The paper presents results of experimental investigation of microchannel boiling flow which was controlled by dielectrophoretic (DEP) restrictor. The DEP restrictor was connected to the microchannel liquid supply tube. Operation of DEP restrictor influenced the flow rate at the microchannel inlet. Resulting changes in flow structures and vapour content along the microchannel were observed and analysed with a high-speed video camera. Video recordings were synchronised with measurements of differential pressure between the channel inlet and outlet. It was found that it is possible to change average void fraction in the microchannel by switching on and off the voltage applied to the restrictor electrodes. However, to achieve significant variation of the void fraction, applied voltage should be of the order of 2000 Vpp. The voltage switching also generates oscillations of the differential pressure. The amplitude of these oscillations is proportional to the voltage magnitude, reaching 35 Pa for 2400 Vpp.
Rocznik
Strony
129--145
Opis fizyczny
Bibliogr. 14 poz., rys.
Twórcy
autor
  • Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland
  • Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland
autor
  • Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland
  • Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland
Bibliografia
  • [1] Pethig R.: Review article – dielectrophoresis: status of the theory, technology, and applications. Biomicrofluidics 4(2010), 2, 022811.
  • [2] Chakraborty D., Chakraborty S.: Microfluidic Transport and Micro-scale Flow Physics: An Overview. In: Microfluidics and Microfabrication, Springer, 2010, 1–85.
  • [3] Li M., Li W.H., Zhang J., Alici G., Wen W.: A review of microfabrication techniques and dielectrophoretic microdevices for particle manipulation and separation. J. Phys. D: Appl. Phys. 47(2014), 6, 063001.
  • [4] Becker F.F., Wang X.-B., Huang Y., Pething R., Vykoukal J., Gascoyne P.R.: Separation of human breast cancer cells from blood by differential dielectric affinity. Proc. Natl. Acad. Sci. U.S.A. 92(1995), 3, 860–864.
  • [5] Green N.G., Morgan H., Milner J.J.: Manipulation and trapping of submicron bioparticles using dielectrophoresis. J. Biochem. Biophys. Methods 35(1997), 89–102.
  • [6] Pellat H.: Force agissant á la surface de séparation de deux diélectriques. CR Seances Acad. Sci. (Paris), 119(1894), 675–678.
  • [7] Jones T.B.: On the Relationship of Dielectrophoresis and Electrowetting. Langmuir, 18(2002), 11, 4437–4443.
  • [8] Jones T.B.: Liquid dielectrophoresis on the microscale. J. Electrostatics 51(2001), 51-52, 290–299.
  • [9] Lackowski M., Krupa A., Butrymowicz D.: Dielectrophoresis flow control in microchannels. J. Electrostatics 71(2013), 5, 921–925.
  • [10] Lackowski M.: Dielectrophoresis flow control of volatile fluids in microchannels. J. Therm. Sci. 24(2015), 5, 1–5.
  • [11] Mikielewicz D., Klugmann M., Wajs J.: Experimental investigation of M-shape heat transfer coefficient distribution of R123 flow boiling in small-diameter tubes. Heat Transfer Eng. 33(2012), 7, 584–595.
  • [12] Kuczyński W., Charun H., Bohdal T.: Influence of hydrodynamic instability on the heat transfer coefficient during condensation of R134a and R404A refrigerants in pipe mini-channels. Int. J. Heat Mass Transfer 55(2012), 4, 1083–1094.
  • [13] Kuczyński W., Charun H.: Modeling of a two-phase region length of the condensation of R134a and R404A refrigerants in pipe minichannels with periodic hydrodynamic in-stabilities. Heat Transfer Eng. 35(2014), 9, 850–862.
  • [14] Berman N.S, Larkam C.W., McKetta J.J.: Vapor heat capacity and heat of vaporization of 2-propanol. J. Chem. Eng. Data 9(1964), 218–219.
Uwagi
EN
This research has been supported by National Science Centre within the Project No. 2012/05/B/ST8/02742.
PL
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-ac034256-e914-40ad-bec1-6543314208c5
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