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

• Autorzy: Lackowski M. , Kwidziński R. , Karwacki J. , Przybyliński T.

Identyfikatory

DOI

10.1515/aoter-2018-0007

• 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.

Słowa kluczowe

EN

visualisation; liquid dielectrophoresis; flow control; flow structures

PL

wizualizacja; sterowanie; przepływ; struktury przepływu

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2018
• Tom: Vol. 39, no 1
• Strony: 129--145
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Lackowski M.

• Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

autor

Kwidziński R.

• Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

autor

Karwacki J.

• Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

autor

Przybyliński T.

• Institute of Fluid Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

Bibliografia

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• [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.
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• [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).