Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"bubble behavior"”.
-
Bubble behavior in subcooled flow boiling on surfaces of variable wettability
… understanding of the conditions leading to bubble departure, surfaces can be designed that increase heat transfer coefficients in flow boiling. Bubbles were visualized during subcooled nucleate flow boiling of water on a surface of variable wettability. Images obtained from the videos were …
-
A photographic study of bubble behavior in a direct-contact boiler
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1980.
-
Analysis Measurement of Bubble Behavior and Associated Flow Field in Sub-Cooled Boiling Flows
Made available in DSpace on 2017-07-06T18:59:32Z (GMT). No. of bitstreams: 3 Wu_Wen_MS.pdf: 943075 bytes, checksum: 61e06a97a0d2d482db39430ab0f99475 (MD5) Wu_Wen_MS_ABS.pdf: 54696 bytes, checksum: 10b31b882d4e6dce0ba3505b63f5daa8 (MD5) license.txt: 4813 bytes, checksum: …
-
Argon Bubble Behavior in Slide-Gate Tundish Nozzles During Continuous Casting of Steel Slabs
… and experiments to investigate the argon bubble behavior in slide-gate nozzles and to analyze phenomena related to product defects and operational problems during the continuous casting of steel slabs. Water model experiments are performed to study bubble formation behavior, including …
-
Numerical Study of Energy Loss Mechanisms in Oscillating Underwater Explosion (UNDEX) Bubbles
… problem of over-prediction for long-term UNDEX bubble behavior in modern hydrocodes that is known to be due to neglected secondary energy-loss mechanisms is evaluated. A single secondary energy-loss mechanism is established as the most significant loss mechanism that is being disregarded in …
-
Boiling on hierarchical nanoengineered surfaces
… heat transfer performance with focus on the bubble departure diameter and frequency. Ultrahigh critical heat fluxes (CHF) greater than 400 W/cm2 were obtained, corresponding to an enhancement of ≈245% compared to smooth copper surfaces. Our work reveals the existence of a linear relationship …
-
Development of Advanced Image Processing Algorithms for Bubbly Flow Measurement
… has a significant value for understanding the bubble behavior, heat and energy transfer pattern in different engineering systems. It also helps to advance the theoretical model development in two-phase flow study. Due to the interaction between the gas and liquid phase, the flow patterns are …
-
Aerodynamic and Acoustic Modeling for eVTOL Rotor Noise Prediction
… transition and laminar separation bubble behavior.</p> <p>Predicted acoustic spectra were validated against experimental measurements obtained in the Virginia Tech Stability Wind Tunnel. Results demonstrate that turbulence model selection influences local boundary-layer development …
-
The influence of surface tension on F2-Bubble Morphology at detachment from carbon electrodes in KF-2HF molten fluoride salt
Molecular F2 and H2-bubbles were generated electrochemically on amorphous carbon electrodes in KF-2HF molten salt to study the effect of surface tension (ϒ) on the profile of a bubble. F2 is used for the purification and enrichment of fuel in the nuclear industry. Its generation is energy-intensive …
-
Molecular Interfaces and Heterogeneous Bubble Nucleation From Heated Surfaces At Nanoscale
… liquid. Therefore, it is important to understand bubble formation, its onset, and behavior over time to advance thermal management applications utilizing nanoscale characteristics. This work aims to investigate bubble nucleation and growth on heated surfaces and understand heat transfer at …
-
Dynamics of Micro-Particles in Complex Environment
… and crowded environment. The dynamics of bubbles and JCMs in liquid films covering solid substrates are studied next. A simple criterion for the formation of bubbles on isolated JCMs is developed and validated. The anomalous bubble growth law (r~t^0.7) is rationalized by considering the …
-
Characterization of pool boiling heat transfer from porous-coating-enhanced surfaces
… performed to understand the boiling patterns and bubble departure parameters that provide explanations for the trends observed in the boiling curves. The measured wall superheat is observed to be significantly lower with a sintered coating compared to the free-particle layer for any given particle …