Abstract
dc:description.abstractPhase-change heat transfer involves the exchange of thermal energy when a substance transitions between different phases, such as solid to liquid (melting), liquid to vapor (boiling), or vice versa. During phase-change, energy is absorbed or released without a change in temperature. In particular, boiling is highly efficient due to the large latent heat of vaporization, allowing for dissipative heat fluxes on the order of q′′ ∼ 10–100 W/cm². However, during boiling, once the temperature exceeds a critical threshold, a vapor film forms between the heated surface and the liquid, suppressing effective nucleate boiling which reduces heat transfer efficiency so that q′′ ∼ 1 W/cm². This critical temperature limitation prompted our exploration of three-phase heat transfer. In three-phase heat transfer, energy is transferred between the solid, liquid, and vapor phases; all of which coexist simultaneously. In this study, we define and investigate three-phase heat transfer by examining ice on a superheated substrate. We explore the use of ice as a quenchant and our findings indicate that dissipative heat fluxes for our three-phase system are an order of magnitude larger than for classical boiling (q′′ ∼ 1,000 W/cm²). This is due to the inherent 100 °C temperature differential across the meltwater film, which dissipates q′′ ∼ 100 W/cm² via conduction (and subsequent ice melting) and an additional q′′ ∼ 100 W/cm² for sensible heating of the meltwater. We propose experiments to measure the dissipative heat flux of a tall and pressurized ice column during three-phase heat transfer. Furthermore, we discuss potential avenues for future research of three-phase heat transfer at high superheats.
Degree
thesis:*- Name thesis:degree_name
- Master of Science
- Level thesis:degree_level
- masters
- Discipline thesis:degree_discipline
- Mechanical Engineering
- Department dc:contributor.department
- Mechanical Engineering
- Grantor dc:publisher
- Virginia Tech
- Year dc:date.issued
- 2024
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Colon, Camryn Luz
- Chair dc:contributor.committeechair
-
- Boreyko, Jonathan B.
- Committee members dc:contributor.committeemember
-
- Lattimer, Brian Y.
- Paul, Mark R.
Subjects
dc:subject × 3Rights
dc:rights- Statement dc:rights
-
- In Copyright
- Licence dc:rights.uri
- Language dc:language.iso
- en
Identifiers
dc:identifier.*- Dc Identifier Other
- vt_gsexam:40203
- OAI identifier oai:identifier
- oai:vtechworks.lib.vt.edu:10919/119008