Impingement of a gas-in-liquid compound drop on a heated flat plate

Ku Nieng Chang, Rong Horng Chen, Jen Yung Pu, Ta-Hui Lin

Research output: Contribution to conferencePaper

Abstract

Phenomena of a gas-in-liquid compound drop hitting a flat plate with a temperature greater than the Leidenfrost temperature were experimentally observed with a high speed video camera. The collision phenomena were found to depend strongly on the Weber number as well as the relative size and position of the gas core within the compound drop. For a gas core of diameter greater than half the compound drop diameter, the collision created a central jet which would penetrate the gas core to form a donut-shaped bubble if the gas core was near the bottom. If the gas core was near the top, the whole process took much longer dimensionless time to complete and the gas core may rupture before it was penetrated by the central jet. A distinct feature of the gas-in-liquid compound drop collision was the relatively large amount of liquid that was left near the center (the contact point). In the range of Weber number studied, the spread of the liquid on the hot plate produced a crown disintegration.

Original languageEnglish
Publication statusPublished - 2009 Jan 1
Event7th Asia-Pacific Conference on Combustion, ASPACC 2009 - Taipei, Taiwan
Duration: 2009 May 242009 May 27

Conference

Conference7th Asia-Pacific Conference on Combustion, ASPACC 2009
CountryTaiwan
CityTaipei
Period09-05-2409-05-27

Fingerprint

impingement
flat plates
Gases
Liquids
liquids
gases
collisions
Disintegration
High speed cameras
Point contacts
disintegration
Video cameras
bubbles
cameras
high speed
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Chemical Engineering(all)

Cite this

Chang, K. N., Chen, R. H., Pu, J. Y., & Lin, T-H. (2009). Impingement of a gas-in-liquid compound drop on a heated flat plate. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.
Chang, Ku Nieng ; Chen, Rong Horng ; Pu, Jen Yung ; Lin, Ta-Hui. / Impingement of a gas-in-liquid compound drop on a heated flat plate. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.
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Chang, KN, Chen, RH, Pu, JY & Lin, T-H 2009, 'Impingement of a gas-in-liquid compound drop on a heated flat plate', Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan, 09-05-24 - 09-05-27.

Impingement of a gas-in-liquid compound drop on a heated flat plate. / Chang, Ku Nieng; Chen, Rong Horng; Pu, Jen Yung; Lin, Ta-Hui.

2009. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.

Research output: Contribution to conferencePaper

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AU - Chang, Ku Nieng

AU - Chen, Rong Horng

AU - Pu, Jen Yung

AU - Lin, Ta-Hui

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N2 - Phenomena of a gas-in-liquid compound drop hitting a flat plate with a temperature greater than the Leidenfrost temperature were experimentally observed with a high speed video camera. The collision phenomena were found to depend strongly on the Weber number as well as the relative size and position of the gas core within the compound drop. For a gas core of diameter greater than half the compound drop diameter, the collision created a central jet which would penetrate the gas core to form a donut-shaped bubble if the gas core was near the bottom. If the gas core was near the top, the whole process took much longer dimensionless time to complete and the gas core may rupture before it was penetrated by the central jet. A distinct feature of the gas-in-liquid compound drop collision was the relatively large amount of liquid that was left near the center (the contact point). In the range of Weber number studied, the spread of the liquid on the hot plate produced a crown disintegration.

AB - Phenomena of a gas-in-liquid compound drop hitting a flat plate with a temperature greater than the Leidenfrost temperature were experimentally observed with a high speed video camera. The collision phenomena were found to depend strongly on the Weber number as well as the relative size and position of the gas core within the compound drop. For a gas core of diameter greater than half the compound drop diameter, the collision created a central jet which would penetrate the gas core to form a donut-shaped bubble if the gas core was near the bottom. If the gas core was near the top, the whole process took much longer dimensionless time to complete and the gas core may rupture before it was penetrated by the central jet. A distinct feature of the gas-in-liquid compound drop collision was the relatively large amount of liquid that was left near the center (the contact point). In the range of Weber number studied, the spread of the liquid on the hot plate produced a crown disintegration.

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Chang KN, Chen RH, Pu JY, Lin T-H. Impingement of a gas-in-liquid compound drop on a heated flat plate. 2009. Paper presented at 7th Asia-Pacific Conference on Combustion, ASPACC 2009, Taipei, Taiwan.