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Nucleation Process in Explosive Boiling Phenomena of Water on Micro-Platinum Wire
Yungpil Yoo1,2, Ho-Young Kwak2,3
1Department of Climate Change Energy Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Entropy (Basel, Switzerland)
|January 22, 2024
Summary
Water can boil explosively at its superheat limit. This study used a molecular model to explore water nucleation, finding rapid evaporation rates and short nucleation times, confirming explosive boiling potential.
Area of Science:
- Thermodynamics
- Fluid Dynamics
- Materials Science
Background:
- The superheat limit defines the maximum temperature for liquid boiling.
- Rapid evaporation is observed at this limit in experimental studies.
- Understanding nucleation is key to predicting explosive boiling.
Purpose of the Study:
- To explore the water nucleation process at the superheat limit.
- To utilize a molecular interaction model for this exploration.
- To quantify nucleation rate and time delay for water.
Main Methods:
- Employing a molecular interaction model.
- Simulating water nucleation at the superheat limit on micro-platinum wires.
- Calculating nucleation rate and time delay.
Main Results:
- Nucleation rate at 576.2 K is approximately 2.1 × 10^11/(μm^3μs).
- Time delay for nucleation at 576.2 K is approximately 5.7 ns.
- Calculated evaporation rate of 116.0 m/s indicates rapid phase transition.
Conclusions:
- Water exhibits a high potential for explosive boiling at its superheat limit.
- The molecular interaction model accurately predicts rapid phase transition.
- Findings are crucial for understanding high-temperature fluid behavior and safety.
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