Abstract
Experiments are performed to develop a fundamental understanding of boiling incipience in wavy free-falling turbulent liquid films. Incipience conditions are measured and correlated for water and a fluorocarbon (FC-72) liquid. Incipience in water films is influenced by turbulent eddies and, to a larger extent, by interfacial waves. A new approach to predicting incipience in water and other non-wetting fluids is presented. This approach utilizes physical parameters of commonly accepted incipience models and provides a means of correcting these models for the effects of turbulent eddies and roll waves. This study also demonstrates some unique incipience characteristics of fluorocarbon films. The weak surface tension forces of FC-72 allow droplets and liquid streams to break of the crests of incoming roll waves prior to, and during nucleate boiling. The low contact angle of FC-72 allows the liquid to penetrate deep inside wall cavities. Thus incipience from these flooded cavities requires much higher wall superheat than predicted from incipience models. (author).
Citation Formats
Marsh, W J, and Mudawar, I.
Predicting the onset of nucleate boiling in wavy free-falling turbulent liquid films.
United Kingdom: N. p.,
1989.
Web.
doi:10.1016/0017-9310(89)90183-X.
Marsh, W J, & Mudawar, I.
Predicting the onset of nucleate boiling in wavy free-falling turbulent liquid films.
United Kingdom.
https://doi.org/10.1016/0017-9310(89)90183-X
Marsh, W J, and Mudawar, I.
1989.
"Predicting the onset of nucleate boiling in wavy free-falling turbulent liquid films."
United Kingdom.
https://doi.org/10.1016/0017-9310(89)90183-X.
@misc{etde_5653390,
title = {Predicting the onset of nucleate boiling in wavy free-falling turbulent liquid films}
author = {Marsh, W J, and Mudawar, I}
abstractNote = {Experiments are performed to develop a fundamental understanding of boiling incipience in wavy free-falling turbulent liquid films. Incipience conditions are measured and correlated for water and a fluorocarbon (FC-72) liquid. Incipience in water films is influenced by turbulent eddies and, to a larger extent, by interfacial waves. A new approach to predicting incipience in water and other non-wetting fluids is presented. This approach utilizes physical parameters of commonly accepted incipience models and provides a means of correcting these models for the effects of turbulent eddies and roll waves. This study also demonstrates some unique incipience characteristics of fluorocarbon films. The weak surface tension forces of FC-72 allow droplets and liquid streams to break of the crests of incoming roll waves prior to, and during nucleate boiling. The low contact angle of FC-72 allows the liquid to penetrate deep inside wall cavities. Thus incipience from these flooded cavities requires much higher wall superheat than predicted from incipience models. (author).}
doi = {10.1016/0017-9310(89)90183-X}
journal = []
volume = {32:2}
journal type = {AC}
place = {United Kingdom}
year = {1989}
month = {Feb}
}
title = {Predicting the onset of nucleate boiling in wavy free-falling turbulent liquid films}
author = {Marsh, W J, and Mudawar, I}
abstractNote = {Experiments are performed to develop a fundamental understanding of boiling incipience in wavy free-falling turbulent liquid films. Incipience conditions are measured and correlated for water and a fluorocarbon (FC-72) liquid. Incipience in water films is influenced by turbulent eddies and, to a larger extent, by interfacial waves. A new approach to predicting incipience in water and other non-wetting fluids is presented. This approach utilizes physical parameters of commonly accepted incipience models and provides a means of correcting these models for the effects of turbulent eddies and roll waves. This study also demonstrates some unique incipience characteristics of fluorocarbon films. The weak surface tension forces of FC-72 allow droplets and liquid streams to break of the crests of incoming roll waves prior to, and during nucleate boiling. The low contact angle of FC-72 allows the liquid to penetrate deep inside wall cavities. Thus incipience from these flooded cavities requires much higher wall superheat than predicted from incipience models. (author).}
doi = {10.1016/0017-9310(89)90183-X}
journal = []
volume = {32:2}
journal type = {AC}
place = {United Kingdom}
year = {1989}
month = {Feb}
}