The capillary flow of water/butanol mixture is investigated in a single groove heat pipe model on board theAirbus A310‘Zero-G’of the European Space Agency. As working fluid for evaporation-based heat transferdevices like conventional or pulsating heat pipes, these kinds of mixtures give more stable behaviour and higherdry-out limit with respect to pure water because of an anomalous behaviour of the surface tension with temper-ature. The groove is embedded in a semi-transparent test cell that allows for the qualitative visualization of theliquid distribution along the channeland is heated and cooled at two opposite sides with an electrical resistanceand a water circulation system. The evaporation/condensation process is regulated changing the power input in arange between 5 and 30 W and the liquid distribution is detected from a top windowusingaCCDcameraandaLED illumination device. The results show that the liquid distribution is affected by the gravity level and thiseffect is normally masked on ground.

Experimental Investigation of Capillary-Driven Two-Phase Flow in Water/Butanol under Reduced Gravity Conditions / Cecere, Anselmo; Di Martino, Giuseppe D.; Mungiguerra, Stefano. - In: MICROGRAVITY, SCIENCE AND TECHNOLOGY. - ISSN 0938-0108. - 31:4(2019), pp. 425-434. [10.1007/s12217-019-09723-9]

Experimental Investigation of Capillary-Driven Two-Phase Flow in Water/Butanol under Reduced Gravity Conditions

Cecere, Anselmo;Di Martino, Giuseppe D.;Mungiguerra, Stefano
2019

Abstract

The capillary flow of water/butanol mixture is investigated in a single groove heat pipe model on board theAirbus A310‘Zero-G’of the European Space Agency. As working fluid for evaporation-based heat transferdevices like conventional or pulsating heat pipes, these kinds of mixtures give more stable behaviour and higherdry-out limit with respect to pure water because of an anomalous behaviour of the surface tension with temper-ature. The groove is embedded in a semi-transparent test cell that allows for the qualitative visualization of theliquid distribution along the channeland is heated and cooled at two opposite sides with an electrical resistanceand a water circulation system. The evaporation/condensation process is regulated changing the power input in arange between 5 and 30 W and the liquid distribution is detected from a top windowusingaCCDcameraandaLED illumination device. The results show that the liquid distribution is affected by the gravity level and thiseffect is normally masked on ground.
2019
Experimental Investigation of Capillary-Driven Two-Phase Flow in Water/Butanol under Reduced Gravity Conditions / Cecere, Anselmo; Di Martino, Giuseppe D.; Mungiguerra, Stefano. - In: MICROGRAVITY, SCIENCE AND TECHNOLOGY. - ISSN 0938-0108. - 31:4(2019), pp. 425-434. [10.1007/s12217-019-09723-9]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/755941
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