The Experts below are selected from a list of 1248 Experts worldwide ranked by ideXlab platform
T.r. Blake - One of the best experts on this subject based on the ideXlab platform.
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Gas Jets in fluidized media, turbulent diffusion flames, and condensing Vapor Jets in liquids
Powder Technology, 1996Co-Authors: T.r. BlakeAbstract:Abstract Dimensional analysis and similitude is used to examine the integral characteristics of turbulent diffusion flames, Jets in fluidized media, and condensing Vapor Jets. Data such as flame length, momentum flux and mass entrainment for these disparate Jets are described in a common dimensionless frame. This, entrainment in turbulent diffusion flames permits an estimate of the particle entrainment in gas Jets in fluidized media. Conversely, since the penetration length of gas Jets in fluidized media is affected by the gas to solid density ratio, similitude permits an assessment of flame to ambient density ratio upon turbulent diffusion flame length.
Hunter J Waite - One of the best experts on this subject based on the ideXlab platform.
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modeling insights into the locations of density enhancements from the enceladus water Vapor Jets
Journal of Geophysical Research, 2015Co-Authors: D M Hurley, M E Perry, Hunter J WaiteAbstract:Monte Carlo modeling of the Vapor erupting from Enceladus' south polar region is presented to demonstrate the influence of physical characteristics of the emitted Vapor on the distribution of particles at altitude. The modeled sources include localized Jets and eruptions distributed along the surface features labeled “tiger stripes.” The modeling reveals that density enhancements are displaced from the source location caused not only by the angle of emission but also by superposition of material from nearby sources. The altitude of the superposition is mass dependent and contributes to differences observed in the mass 28 and mass 44 channels of the Cassini Ion and Neutral Mass Spectrometer (INMS) during Enceladus encounters. INMS data are well modeled using only the tiger stripe sources; however, certain regions require additional sources to reproduce some features of the data. In particular, an excess source is required for 44 unified atomic mass unit (u) on the Saturn-facing hemisphere of Baghdad Sulcus. It is apparent in three parallel Cassini flybys. A relative decrease in the source rate is observed for mass 28 u for E14. The more diffuse nature of the 28 u INMS observations compared to the more collimated structure of the 44 u INMS observations is consistent with increased thermal spreading for low-mass constituents of the plume.
Gautam Biswas - One of the best experts on this subject based on the ideXlab platform.
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Analysis of interfacial instability and multimode bubble formation in saturated boiling using coupled level set and volume-of-fluid approach
Physics of Fluids, 2014Co-Authors: Abhiram Hens, Gautam BiswasAbstract:The dynamics of Vapor-liquid interface are important because interfacial instability determines bubble growth, detachment frequency, waiting time, shape of bubbles, and the interrelationship between bubble formation sites. In this study, a detailed numerical simulation has been performed to understand the transition in bubble release pattern and multimode bubble formation in saturated pool boiling. The interfaces drop down alternatively at the nodes and antinodes of the wavelengths dictated by Rayleigh-Taylor instability and Taylor-Helmholtz instability. Due to higher degrees of superheat, Vapor Jets emanate from nodes and antinodes. An attempt has been made to predict the maximum and minimum heat fluxes during saturated pool boiling.
Suk Ho Chung - One of the best experts on this subject based on the ideXlab platform.
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Flame spread over electrical wire with AC electric fields: Internal circulation, fuel Vapor-jet, spread rate acceleration, and molten insulator dripping
Combustion and Flame, 2015Co-Authors: Seung Jae Lim, Jeong Park, Osamu Fujita, Min Kuk Kim, Suk Ho ChungAbstract:The effect of electric field on the characteristics of flame spread along a polyethylene (PE) insulated electrical wire was investigated experimentally by varying the AC frequency and voltage applied to the wire. The results showed that the flame spread rate was accelerated due to the convergence of electric flux near the end of wire, having three distinct regimes depending on applied voltage. In each regime, several subregimes could be identified depending on AC frequency. Flame shape (height and width) and slanted direction of the spreading flame were influenced differently. Fuel-Vapor Jets were ejected from the molten PE surface even for the baseline case without the application of an electric field; this could be attributed to the bursting of fuel Vapor bubbles generated from internal boiling at the molten PE surface. An internal circulation of molten-PE was also observed as a result of non-uniform heating by the spreading flame. In the high voltage regime with a high AC frequency, excessive dripping of molten PE led to flame extinction.
D M Hurley - One of the best experts on this subject based on the ideXlab platform.
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modeling insights into the locations of density enhancements from the enceladus water Vapor Jets
Journal of Geophysical Research, 2015Co-Authors: D M Hurley, M E Perry, Hunter J WaiteAbstract:Monte Carlo modeling of the Vapor erupting from Enceladus' south polar region is presented to demonstrate the influence of physical characteristics of the emitted Vapor on the distribution of particles at altitude. The modeled sources include localized Jets and eruptions distributed along the surface features labeled “tiger stripes.” The modeling reveals that density enhancements are displaced from the source location caused not only by the angle of emission but also by superposition of material from nearby sources. The altitude of the superposition is mass dependent and contributes to differences observed in the mass 28 and mass 44 channels of the Cassini Ion and Neutral Mass Spectrometer (INMS) during Enceladus encounters. INMS data are well modeled using only the tiger stripe sources; however, certain regions require additional sources to reproduce some features of the data. In particular, an excess source is required for 44 unified atomic mass unit (u) on the Saturn-facing hemisphere of Baghdad Sulcus. It is apparent in three parallel Cassini flybys. A relative decrease in the source rate is observed for mass 28 u for E14. The more diffuse nature of the 28 u INMS observations compared to the more collimated structure of the 44 u INMS observations is consistent with increased thermal spreading for low-mass constituents of the plume.
