A5040950533- Heat Transfer and Boiling Studies
- Fluid Dynamics and Heat Transfer
- Heat Transfer and Optimization
- Fluid Dynamics and Mixing
- Nanofluid Flow and Heat Transfer
- Nuclear Engineering Thermal-Hydraulics
- Fluid Dynamics and Thin Films
- Heat Transfer Mechanisms
- Heat transfer and supercritical fluids
- Surface Modification and Superhydrophobicity
- Particle Dynamics in Fluid Flows
- Spacecraft and Cryogenic Technologies
- Nuclear Materials and Properties
- Nuclear and radioactivity studies
- Metallurgical Processes and Thermodynamics
- Refrigeration and Air Conditioning Technologies
- Risk and Safety Analysis
- Graphite, nuclear technology, radiation studies
- Fluid Dynamics and Turbulent Flows
- Lattice Boltzmann Simulation Studies
- Thermal properties of materials
- Nuclear reactor physics and engineering
- Engineering Applied Research
- nanoparticles nucleation surface interactions
- Natural product bioactivities and synthesis
Kyung Hee University
2013-2024
Bridge University
2024
Massachusetts Institute of Technology
2009-2013
Pohang University of Science and Technology
2006-2007
In recent quenching heat transfer studies of nanofluids, it was found that deposition nanoparticles on a surface raises its Leidenfrost point (LFP) considerably [Kim et al., Int. J. Multiphase Flow 35, 427 (2009) and Kim Heat Mass Transfer 53, 1542 (2010)]. To probe the physical mechanism underlying this observation, effects properties LFP water droplets were studied, using custom-fabricated surfaces for which roughness height, wettability, porosity controlled at nanoscale. This approach...
The pool boiling characteristics of water-based nanofluids with alumina and titania nanoparticles 0.01 vol % were investigated on a thermally heated disk heater at saturated temperature atmospheric pressure. results confirmed the findings previous studies that can significantly enhance critical heat flux (CHF), resulting in large increase wall superheat. It was found some deposit surface during nucleate boiling, modification due to deposition same magnitude CHF enhancement pure water as for...
We report a novel boiling heat transfer (NBHT) in reduced graphene oxide (RGO) suspended water (RGO colloid) near critical flux (CHF), which is traditionally the dangerous limitation of nucleate because heater failure. When reaches maximum value (CHF) RGO colloid pool boiling, wall temperature increases gradually and slowly with an almost constant flux, contrary to rapid increase found during boiling. The gained time by NBHT would provide safer margin amazing impact on thermal system as...
Self-assembled foam-like graphene (SFG) structures were formed using a simple nucleate boiling method, which is governed by the dynamics of bubble generation and departure in colloid solution. The conductivity sheet resistance calcined (400°C) SFG film 11.8 S·cm–1 91.2 Ω□−1, respectively comparable to those obtained chemical vapor deposition (CVD) (~10 S·cm–1). can be directly on any substrate, including transparent conductive oxide (TCO) glasses, metals, bare glasses flexible polymers. As...
AbstractOn a visible-transparent boiling surface, the detailed geometry of microlayer can be detected using total reflection technique combined with laser interferometry. On an infrared-opaque surface temperature and heat flux distribution obtained high-speed infrared thermometry technique. In present study, experimental to study transfer in is described that permits simultaneous use interferometry thermometry. Boiling takes place from indium–tin-oxide thin-film heater deposited on infrared-...
We investigate the drop splashing threshold ST of water on a rough surface. Surface roughness has been known to facilitate splashing, but counterexample observed. Here, we suggest possible explanation how surface morphology affects splashing. focus air flow during event and estimate To demonstrate this effect, experiments using well-designed surfaces were conducted, results agree with our relation. This work shows that can both suppress presents method predict different morphologies.
Boiling heat transfer (BHT) is a particularly efficient transport method because of the latent associated with process. However, efficiency BHT decreases significantly increasing wall temperature when critical flux (CHF) reached. Graphene has received much recent research attention for applications in thermal engineering due to its large conductivity. In this study, graphene films various thicknesses were deposited on heated surface, and enhancements CHF investigated via pool-boiling...