Research output: Contribution to journal › Conference article › peer-review
Heat flux density measurments in the contact line of the heated sessile droplet/falling down liquid rivulet. / Cheverda, V. V.; Ponomarenko, T. G.; Karchevsky, A. L. et al.
In: International Heat Transfer Conference, Vol. 2018-August, 01.01.2018, p. 6633-6640.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Heat flux density measurments in the contact line of the heated sessile droplet/falling down liquid rivulet
AU - Cheverda, V. V.
AU - Ponomarenko, T. G.
AU - Karchevsky, A. L.
AU - Kabov, O. A.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The evaporating water droplets on a horizontal heated substrate and falling down water/FC-72 liquid rivulets on a vertical heated substrate was experimentally investigated. The foil made of constantan with thickness of 25 μm and a size of 88x35 mm2 was used as a heated substrate. The experiments were carried out with a single droplet, with an ensemble of two or three droplets on the foil and also with falling down liquid rivulet on the vertical foil. With the help of an IR scanner the temperature of the lower surface of the foil was measured. The heat flux density at evaporation of liquid near the contact line is determined by solving the Cauchy problem for the heat conduction equation using the thermographic data. The maximal heat flux density takes place in the region of the contact line and exceeds significantly the heat flux density from the entire surface of the foil. This is explained by the heat transport from the foil periphery to the droplet/rivulet due to the relatively high value of the coefficient of heat conductivity of the constantan and by the high evaporation intensity in the contact line region.
AB - The evaporating water droplets on a horizontal heated substrate and falling down water/FC-72 liquid rivulets on a vertical heated substrate was experimentally investigated. The foil made of constantan with thickness of 25 μm and a size of 88x35 mm2 was used as a heated substrate. The experiments were carried out with a single droplet, with an ensemble of two or three droplets on the foil and also with falling down liquid rivulet on the vertical foil. With the help of an IR scanner the temperature of the lower surface of the foil was measured. The heat flux density at evaporation of liquid near the contact line is determined by solving the Cauchy problem for the heat conduction equation using the thermographic data. The maximal heat flux density takes place in the region of the contact line and exceeds significantly the heat flux density from the entire surface of the foil. This is explained by the heat transport from the foil periphery to the droplet/rivulet due to the relatively high value of the coefficient of heat conductivity of the constantan and by the high evaporation intensity in the contact line region.
KW - Evaporation
KW - Liquid droplet
KW - Liquid rivulet
KW - Microregion
KW - Wetting contact line
UR - http://www.scopus.com/inward/record.url?scp=85068334016&partnerID=8YFLogxK
U2 - 10.1615/ihtc16.mpf.024707
DO - 10.1615/ihtc16.mpf.024707
M3 - Conference article
AN - SCOPUS:85068334016
VL - 2018-August
SP - 6633
EP - 6640
JO - International Heat Transfer Conference
JF - International Heat Transfer Conference
SN - 2377-424X
T2 - 16th International Heat Transfer Conference, IHTC 2018
Y2 - 10 August 2018 through 15 August 2018
ER -
ID: 20776539