The Experts below are selected from a list of 41976 Experts worldwide ranked by ideXlab platform
G D Jian - One of the best experts on this subject based on the ideXlab platform.
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synergistic Mitigation of the rayleigh taylor instability in z pinch implosions by sheared axial flow and finite larmor radius Effect
Physics of Plasmas, 2003Co-Authors: X M Qiu, L Huang, G D JianAbstract:The synergistic stabilizing Effect of sheared axial flow (SAF) and finite Larmor radius (FLR) on the Rayleigh–Taylor instability in Z-pinch implosions is considered by means of the magnetohydrodynamic (MHD) equations. The SAF is introduced into the MHD equations in a conventional way and the FLR is introduced in the same way as used by Roberts and Taylor [Phys. Rev. Lett. 8, 197 (1962)]. Therefore, the linearized MHD equations include both SAF and FLR Effects. The results indicate that in the whole wavenumber region the synergistic Effect of FLR and SAF can mitigate the Rayleigh–Taylor instability; at low flow velocity the synergistic Effect of FLR and the SAF is slightly (∼10%) stronger than the Mitigation Effect of FLR alone and remarkably stronger than the Mitigation Effect of the SAF alone; at higher flow velocities in the large wavenumber region (for normalized wavenumber κ>2.4) the synergistic Effect of FLR and the SAF is remarkably stronger than the Mitigation Effect due to either one of the two, r...
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Synergistic Mitigation of the Rayleigh–Taylor instability in Z-pinch implosions by sheared axial flow and finite Larmor radius Effect
Physics of Plasmas, 2003Co-Authors: X M Qiu, L Huang, G D JianAbstract:The synergistic stabilizing Effect of sheared axial flow (SAF) and finite Larmor radius (FLR) on the Rayleigh–Taylor instability in Z-pinch implosions is considered by means of the magnetohydrodynamic (MHD) equations. The SAF is introduced into the MHD equations in a conventional way and the FLR is introduced in the same way as used by Roberts and Taylor [Phys. Rev. Lett. 8, 197 (1962)]. Therefore, the linearized MHD equations include both SAF and FLR Effects. The results indicate that in the whole wavenumber region the synergistic Effect of FLR and SAF can mitigate the Rayleigh–Taylor instability; at low flow velocity the synergistic Effect of FLR and the SAF is slightly (∼10%) stronger than the Mitigation Effect of FLR alone and remarkably stronger than the Mitigation Effect of the SAF alone; at higher flow velocities in the large wavenumber region (for normalized wavenumber κ>2.4) the synergistic Effect of FLR and the SAF is remarkably stronger than the Mitigation Effect due to either one of the two, r...
Liam Wotherspoon - One of the best experts on this subject based on the ideXlab platform.
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Mitigation Effect of vertical walls on wharf model subjected to tsunami bores
Journal of Earthquake and Tsunami, 2017Co-Authors: Cheng Chen, Bruce W. Melville, N.a.k. Nandasena, Asaad Y. Shamseldin, Liam WotherspoonAbstract:An experimental study was carried out to investigate the Mitigation Effect of vertical walls on a wharf model subjected to tsunami bores. Dam-break waves were generated in a flume to simulate tsunami bore propagation, the bore characteristics were observed, and the tsunami pressures on vertical walls and a wharf model were measured. Results indicate different characteristics for bores traveling on wet-bed and dry-bed. The tsunami bore impact on a vertical wall was shown to exhibit four stages, and the time-history of the pressure exhibits three phases accordingly. Based on the law of conservation of energy, an equation for estimating the pressure exerted on the mid-point of the wall was proposed with coefficient of 1.8–2.4, and found to be suitable in this experimental range. Based on experimental data, an equation of the Mitigation Effect of vertical walls on tsunami was proposed as a function of the inundation depth, the wall height and the deck height. The predicted values from the equation are generally within ±20% of the measured values.
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Mitigation Effect of Vertical Walls on a Wharf Model Subjected to Tsunami Bores
Journal of Earthquake and Tsunami, 2017Co-Authors: Cheng Chen, Bruce W. Melville, N.a.k. Nandasena, Asaad Y. Shamseldin, Liam WotherspoonAbstract:An experimental study was carried out to investigate the Mitigation Effect of vertical walls on a wharf model subjected to tsunami bores. Dam-break waves were generated in a flume to simulate tsunami bore propagation, the bore characteristics were observed, and the tsunami pressures on vertical walls and a wharf model were measured. Results indicate different characteristics for bores traveling on wet-bed and dry-bed. The tsunami bore impact on a vertical wall was shown to exhibit four stages, and the time-history of the pressure exhibits three phases accordingly. Based on the law of conservation of energy, an equation for estimating the pressure exerted on the mid-point of the wall was proposed with coefficient of 1.8–2.4, and found to be suitable in this experimental range. Based on experimental data, an equation of the Mitigation Effect of vertical walls on tsunami was proposed as a function of the inundation depth, the wall height and the deck height. The predicted values from the equation are generally within [Formula: see text] of the measured values.
Masakazu Moriyama - One of the best experts on this subject based on the ideXlab platform.
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Study on the urban heat island Mitigation Effect achieved by converting to grass-covered parking
Solar Energy, 2009Co-Authors: Hideki Takebayashi, Masakazu MoriyamaAbstract:Abstract The urban heat island Mitigation Effect of conversion from asphalt-covered parking areas to grass-covered ones is estimated by observation and calculation. The mean surface temperature in a parking lot is calculated from a thermal image captured by an infrared camera. The sensible heat flux in each parking space is calculated based on the surface heat budget. The reduction in the sensible heat flux is estimated to be approximately 100–150 W m −2 during the day and approximately 50 W m −2 during the night, in comparison with an asphalt surface. The air temperature reduction by the spread of grass-covered parking areas is calculated to be about 0.1 °C. Furthermore, consideration is given to the appearance of the parking lot, the growth of grass, the Effects of the weight of a car and the heat radiated from its engine, the costs of construction and maintenance, etc.
Lidia Morawska - One of the best experts on this subject based on the ideXlab platform.
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Modeling the urban heat island Mitigation Effect of cool coatings in realistic urban morphology
Journal of Cleaner Production, 2020Co-Authors: Nairui Liu, Lidia MorawskaAbstract:There are currently more than 400 cities that are subject to the urban heat island (UHI) Effect, whose summer temperature can be over 15 °C above the human thermal comfort zone. As the scope of urbanization expands, more people will feel the influence of the UHI Effect. Since cool coatings can serve as a Mitigation measure against the UHI Effect, this research proposes a method that can estimate its Mitigation Effect in any given region. The main idea of this method is to simulate the function of cool coatings via increasing the albedo values in the Weather Research and Forecasting (WRF) model. The main novelty of this method is that it incorporates detailed land categorization data to simulate realistic urban morphology for the purpose of improving model performance. To demonstrate the feasibility of the proposed method, the UHI Mitigation Effect of cool coatings was estimated in the city of Sydney during two consecutive sweltering days (7–8 January 2018) via the WRF model. The results showed that the proposed method fulfilled its purpose. To be specific, as the consequence of a 0.35 albedo increase in urban Sydney, the whole urban area will be subject to an average temperature decrease of 0.76 °C, while some regions will experience a temperature decrease as great as 5.71 °C during the hottest hour. However, this value for a given zone, such as the downtown coast area, was closely related to the local wind directions. The results also showed that the values of different urban canopy parameters could be treated as auxiliary information of WRF modeling results and used to identify the locations that suffered the most from the UHI Effect. Therefore, the proposed method can help decision-makers and stakeholders to better analyze the UHI Mitigation potential of cool coatings. Additionally, it indicates incorporating detailed land categorization data is an Effective way of improving UHI numerical simulations.
X M Qiu - One of the best experts on this subject based on the ideXlab platform.
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synergistic Mitigation of the rayleigh taylor instability in z pinch implosions by sheared axial flow and finite larmor radius Effect
Physics of Plasmas, 2003Co-Authors: X M Qiu, L Huang, G D JianAbstract:The synergistic stabilizing Effect of sheared axial flow (SAF) and finite Larmor radius (FLR) on the Rayleigh–Taylor instability in Z-pinch implosions is considered by means of the magnetohydrodynamic (MHD) equations. The SAF is introduced into the MHD equations in a conventional way and the FLR is introduced in the same way as used by Roberts and Taylor [Phys. Rev. Lett. 8, 197 (1962)]. Therefore, the linearized MHD equations include both SAF and FLR Effects. The results indicate that in the whole wavenumber region the synergistic Effect of FLR and SAF can mitigate the Rayleigh–Taylor instability; at low flow velocity the synergistic Effect of FLR and the SAF is slightly (∼10%) stronger than the Mitigation Effect of FLR alone and remarkably stronger than the Mitigation Effect of the SAF alone; at higher flow velocities in the large wavenumber region (for normalized wavenumber κ>2.4) the synergistic Effect of FLR and the SAF is remarkably stronger than the Mitigation Effect due to either one of the two, r...
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Synergistic Mitigation of the Rayleigh–Taylor instability in Z-pinch implosions by sheared axial flow and finite Larmor radius Effect
Physics of Plasmas, 2003Co-Authors: X M Qiu, L Huang, G D JianAbstract:The synergistic stabilizing Effect of sheared axial flow (SAF) and finite Larmor radius (FLR) on the Rayleigh–Taylor instability in Z-pinch implosions is considered by means of the magnetohydrodynamic (MHD) equations. The SAF is introduced into the MHD equations in a conventional way and the FLR is introduced in the same way as used by Roberts and Taylor [Phys. Rev. Lett. 8, 197 (1962)]. Therefore, the linearized MHD equations include both SAF and FLR Effects. The results indicate that in the whole wavenumber region the synergistic Effect of FLR and SAF can mitigate the Rayleigh–Taylor instability; at low flow velocity the synergistic Effect of FLR and the SAF is slightly (∼10%) stronger than the Mitigation Effect of FLR alone and remarkably stronger than the Mitigation Effect of the SAF alone; at higher flow velocities in the large wavenumber region (for normalized wavenumber κ>2.4) the synergistic Effect of FLR and the SAF is remarkably stronger than the Mitigation Effect due to either one of the two, r...