Dynamic behavior of a heated meniscus subjected to a transient acceleration field for a small capillary number
- Wright Lab., Wright-Patterson AFB, OH (United States)
- Univ. of Dayton, OH (United States)
The dynamic response of a heated meniscus within a capillary tube subjected to single and multiple cycle transient acceleration induced forces was studied experimentally and analytically. A capillary tube was partially filled with ethyl alcohol and mounted on a centrifuge for visual observation of the dynamic response of the meniscus subject to an acceleration transient. A one-dimensional mathematical model was formulated to predict the dynamic response of the meniscus and compared with experimental results. For the case in which the meniscus was heated, thermocapillary stresses in the near contact line region were accounted for in the model by an effective change in contact angle to account for adverse thermocapillary stresses present at the contact line. Experimental results and analytical calculations were compared for a Bond number of 1.47 and a capillary number of 3.00 {times} 10{sup {minus}6}. Experimental data of the meniscus recession and advance agreed well with a one-dimensional equation of motion accounting for the ``dynamic`` contact angle.
- OSTI ID:
- 449503
- Report Number(s):
- CONF-950828-; ISBN 0-7918-1706-7; TRN: IM9714%%60
- Resource Relation:
- Conference: 1995 National heat transfer conference, Portland, OR (United States), 5-9 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 national heat transfer conference: Proceedings. Volume 5: Heat transfer in aerospace devices or systems; Heat pipes and thermosyphons; Gas turbine heat transfer; HTD-Volume 307; Downing, S.; Haas, L.; Chang, W.S.; McEligot, D.M. [eds.]; PB: 152 p.
- Country of Publication:
- United States
- Language:
- English
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