Research output: Contribution to journal › Article › peer-review
An experimental study of vapor bubbles dynamics at water and ethanol pool boiling at low and high heat fluxes. / Surtaev, Anton; Serdyukov, Vladimir; Zhou, Jingjing et al.
In: International Journal of Heat and Mass Transfer, Vol. 126, 01.11.2018, p. 297-311.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - An experimental study of vapor bubbles dynamics at water and ethanol pool boiling at low and high heat fluxes
AU - Surtaev, Anton
AU - Serdyukov, Vladimir
AU - Zhou, Jingjing
AU - Pavlenko, Aleksandr
AU - Tumanov, Vladislav
PY - 2018/11/1
Y1 - 2018/11/1
N2 - In this paper the results of experimental study of vapor bubbles dynamics at pool boiling of various liquids in a wide range of heat fluxes up to q/qCHF ∼ 0.9 are presented. The experiments were performed at boiling of saturated water and ethanol at atmospheric pressure with the use of high-speed experimental techniques including video macro-visualization and IR thermography from the bottom side of a transparent heated sample. As a result, new data on the growth rate of vapor bubbles and dry spots in their base, evolution of the liquid microlayer region and unsteady temperature field of a thin film heater surface were obtained, and analysis of patterns of process at low heat fluxes was carried out. The usage of high-speed experimental techniques also allowed in this study to investigate the evolution of vapor bubbles with formation of vapor patterns and large agglomerates, to study dry spots dynamics, to estimate void fraction close to heating surface at fully developed nucleate boiling regime up to the critical heat flux depending on liquid properties. Obtained experimental information can be further used to construct more accurate physical models for the theoretical description of microcharacteristics, heat transfer and boiling trigger mechanisms at nucleate boiling of liquids with different physical properties.
AB - In this paper the results of experimental study of vapor bubbles dynamics at pool boiling of various liquids in a wide range of heat fluxes up to q/qCHF ∼ 0.9 are presented. The experiments were performed at boiling of saturated water and ethanol at atmospheric pressure with the use of high-speed experimental techniques including video macro-visualization and IR thermography from the bottom side of a transparent heated sample. As a result, new data on the growth rate of vapor bubbles and dry spots in their base, evolution of the liquid microlayer region and unsteady temperature field of a thin film heater surface were obtained, and analysis of patterns of process at low heat fluxes was carried out. The usage of high-speed experimental techniques also allowed in this study to investigate the evolution of vapor bubbles with formation of vapor patterns and large agglomerates, to study dry spots dynamics, to estimate void fraction close to heating surface at fully developed nucleate boiling regime up to the critical heat flux depending on liquid properties. Obtained experimental information can be further used to construct more accurate physical models for the theoretical description of microcharacteristics, heat transfer and boiling trigger mechanisms at nucleate boiling of liquids with different physical properties.
KW - Dry spots
KW - Heat transfer
KW - High speed visualization
KW - IR thermography
KW - Liquid microlayer
KW - Pool boiling
KW - Two-phase flows
KW - VISUALIZATION
KW - INFRARED THERMOMETRY
KW - MICROLAYER
KW - MECHANISMS
KW - DEPARTURE
KW - MODELS
KW - GROWTH
KW - SURFACE
KW - CRISIS
KW - NUCLEATION
UR - http://www.scopus.com/inward/record.url?scp=85048224145&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2018.06.001
DO - 10.1016/j.ijheatmasstransfer.2018.06.001
M3 - Article
AN - SCOPUS:85048224145
VL - 126
SP - 297
EP - 311
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
ER -
ID: 13846482