The Experts below are selected from a list of 57603 Experts worldwide ranked by ideXlab platform
Tohru Fukano - One of the best experts on this subject based on the ideXlab platform.
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effects of Liquid Viscosity on flow patterns in vertical upward gas Liquid two phase flow
International Journal of Multiphase Flow, 2001Co-Authors: T Furukawa, Tohru FukanoAbstract:Abstract The purpose of the present experimental study is to investigate the effects of Liquid Viscosity on the flow patterns of upward air–Liquid two-phase flow in a vertical tube of 19.2 mm in inner diameter and about 5.4 m in length. Three different Liquids, including water and aqueous glycerol solutions, were employed. Kinematic Viscosity of these Liquids varied from 1.0×10 −6 to 14.7×10 −6 m 2 /s. The flow patterns were observed using a video recorder and still photography. The time-spatial characteristic maps of gas–Liquid interfaces which were drawn using the mean Liquid holdup signals detected by 70 pairs of holdup sensors arranged with the axial spacing of 15 mm over the length of 1.035 m were also used. In this report, we first defined the flow pattern of each flow. Next, the effects of Liquid Viscosity on the overall flow pattern and interfacial structures, or the interfacial waves, were discussed. Finally, based on those results we proposed flow pattern maps for each Liquid Viscosity. It is found that the flow pattern transitions strongly depend on the Liquid Viscosity.
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Effects of Liquid Viscosity on flow patterns in vertical upward gas–Liquid two-phase flow
International Journal of Multiphase Flow, 2001Co-Authors: T Furukawa, Tohru FukanoAbstract:Abstract The purpose of the present experimental study is to investigate the effects of Liquid Viscosity on the flow patterns of upward air–Liquid two-phase flow in a vertical tube of 19.2 mm in inner diameter and about 5.4 m in length. Three different Liquids, including water and aqueous glycerol solutions, were employed. Kinematic Viscosity of these Liquids varied from 1.0×10 −6 to 14.7×10 −6 m 2 /s. The flow patterns were observed using a video recorder and still photography. The time-spatial characteristic maps of gas–Liquid interfaces which were drawn using the mean Liquid holdup signals detected by 70 pairs of holdup sensors arranged with the axial spacing of 15 mm over the length of 1.035 m were also used. In this report, we first defined the flow pattern of each flow. Next, the effects of Liquid Viscosity on the overall flow pattern and interfacial structures, or the interfacial waves, were discussed. Finally, based on those results we proposed flow pattern maps for each Liquid Viscosity. It is found that the flow pattern transitions strongly depend on the Liquid Viscosity.
Giovanni Di Nicola - One of the best experts on this subject based on the ideXlab platform.
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Surface tension correlation of carboxylic acids from Liquid Viscosity data
Fluid Phase Equilibria, 2019Co-Authors: Mariano Pierantozzi, Giovanni Di NicolaAbstract:Abstract This study presents a method to calculate the surface tension of a wide variety of organic carboxylic-based acids molecules starting from the experimental data of the Liquid Viscosity. The first step of this research was a data collection and then an accurate selection of experimental sources for the calculation of surface tension. Besides, in order to build two different but comparable databanks, the experimental points were regressed with simple equations at the same reduced temperature range, spanning from 0.35 to 0.75. As a final step, the original relationship of Pelofsky between the natural logarithm of surface tension and the inverse of Viscosity was changed to better describe the property under investigation. The simple modification of adding the reduced temperature allowed to achieve an AAD of 1.24% for the whole dataset that contains 22 fluids with 170 surface tension data and 379 Liquid Viscosity experimental data.
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Surface tension calculation from Liquid Viscosity data of silanes
Fluid Phase Equilibria, 2018Co-Authors: Giovanni Di Nicola, Mariano Pierantozzi, Sebastiano Tomassetti, Gianluca CocciaAbstract:Abstract This work presents a method to calculate the surface tension of the inorganic family of silicon-based molecules starting from the knowledge of the Liquid Viscosity. As a first step, the raw experimental data of silanes were collected from the data available in the DIPPR database, both for surface tension and Liquid Viscosity. After the data analysis, a selection of experimental data was considered for the calculations. Furthermore, to create two homogeneous databanks, the original experimental data were regressed at the same reduced temperature range, spanning from 0.3 to 0.8. The original Pelofsky empirical relationship between the natural logarithm of surface tension and the inverse of Viscosity was modified to represent the surface tension of silanes starting from the Viscosity of Liquids. The obtained results produced an AAD = 1.13% calculated on the entire dataset.
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New Equation for the Liquid Viscosity of Silanes
Journal of Thermophysics and Heat Transfer, 2017Co-Authors: Giovanni Di Nicola, Gianluca Coccia, Lorenza Malvagi, Mariano PierantozziAbstract:This work presents a new formula to calculate the Liquid Viscosity of the inorganic family of silicon-based molecules. As a first step, the raw Viscosity experimental data of silanes were collected...
Li Ping - One of the best experts on this subject based on the ideXlab platform.
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Estimation of Liquid Viscosity of pure compounds at different temperatures by a corresponding-states group-contribution method
Fluid Phase Equilibria, 2002Co-Authors: Liang Yinghua, Li PingAbstract:A new equation for estimating Liquid Viscosity of pure compounds in a corresponding-state group-contribution method (CSGC) is presented. Group-contribution parameters of 84 groups were obtained by correlating experimental Liquid Viscosity data at different temperatures (a total of 2777 data points) of 366 compounds including various alkanes, alkenes, cyclohydrocarbons, aromatic and oxygenated hydrocarbons as well as compounds containing sulfur, nitrogen and halogen. The new method demonstrates significant improvement in accuracy.
T Furukawa - One of the best experts on this subject based on the ideXlab platform.
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effects of Liquid Viscosity on flow patterns in vertical upward gas Liquid two phase flow
International Journal of Multiphase Flow, 2001Co-Authors: T Furukawa, Tohru FukanoAbstract:Abstract The purpose of the present experimental study is to investigate the effects of Liquid Viscosity on the flow patterns of upward air–Liquid two-phase flow in a vertical tube of 19.2 mm in inner diameter and about 5.4 m in length. Three different Liquids, including water and aqueous glycerol solutions, were employed. Kinematic Viscosity of these Liquids varied from 1.0×10 −6 to 14.7×10 −6 m 2 /s. The flow patterns were observed using a video recorder and still photography. The time-spatial characteristic maps of gas–Liquid interfaces which were drawn using the mean Liquid holdup signals detected by 70 pairs of holdup sensors arranged with the axial spacing of 15 mm over the length of 1.035 m were also used. In this report, we first defined the flow pattern of each flow. Next, the effects of Liquid Viscosity on the overall flow pattern and interfacial structures, or the interfacial waves, were discussed. Finally, based on those results we proposed flow pattern maps for each Liquid Viscosity. It is found that the flow pattern transitions strongly depend on the Liquid Viscosity.
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Effects of Liquid Viscosity on flow patterns in vertical upward gas–Liquid two-phase flow
International Journal of Multiphase Flow, 2001Co-Authors: T Furukawa, Tohru FukanoAbstract:Abstract The purpose of the present experimental study is to investigate the effects of Liquid Viscosity on the flow patterns of upward air–Liquid two-phase flow in a vertical tube of 19.2 mm in inner diameter and about 5.4 m in length. Three different Liquids, including water and aqueous glycerol solutions, were employed. Kinematic Viscosity of these Liquids varied from 1.0×10 −6 to 14.7×10 −6 m 2 /s. The flow patterns were observed using a video recorder and still photography. The time-spatial characteristic maps of gas–Liquid interfaces which were drawn using the mean Liquid holdup signals detected by 70 pairs of holdup sensors arranged with the axial spacing of 15 mm over the length of 1.035 m were also used. In this report, we first defined the flow pattern of each flow. Next, the effects of Liquid Viscosity on the overall flow pattern and interfacial structures, or the interfacial waves, were discussed. Finally, based on those results we proposed flow pattern maps for each Liquid Viscosity. It is found that the flow pattern transitions strongly depend on the Liquid Viscosity.
Mariano Pierantozzi - One of the best experts on this subject based on the ideXlab platform.
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Surface tension correlation of carboxylic acids from Liquid Viscosity data
Fluid Phase Equilibria, 2019Co-Authors: Mariano Pierantozzi, Giovanni Di NicolaAbstract:Abstract This study presents a method to calculate the surface tension of a wide variety of organic carboxylic-based acids molecules starting from the experimental data of the Liquid Viscosity. The first step of this research was a data collection and then an accurate selection of experimental sources for the calculation of surface tension. Besides, in order to build two different but comparable databanks, the experimental points were regressed with simple equations at the same reduced temperature range, spanning from 0.35 to 0.75. As a final step, the original relationship of Pelofsky between the natural logarithm of surface tension and the inverse of Viscosity was changed to better describe the property under investigation. The simple modification of adding the reduced temperature allowed to achieve an AAD of 1.24% for the whole dataset that contains 22 fluids with 170 surface tension data and 379 Liquid Viscosity experimental data.
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Surface tension calculation from Liquid Viscosity data of silanes
Fluid Phase Equilibria, 2018Co-Authors: Giovanni Di Nicola, Mariano Pierantozzi, Sebastiano Tomassetti, Gianluca CocciaAbstract:Abstract This work presents a method to calculate the surface tension of the inorganic family of silicon-based molecules starting from the knowledge of the Liquid Viscosity. As a first step, the raw experimental data of silanes were collected from the data available in the DIPPR database, both for surface tension and Liquid Viscosity. After the data analysis, a selection of experimental data was considered for the calculations. Furthermore, to create two homogeneous databanks, the original experimental data were regressed at the same reduced temperature range, spanning from 0.3 to 0.8. The original Pelofsky empirical relationship between the natural logarithm of surface tension and the inverse of Viscosity was modified to represent the surface tension of silanes starting from the Viscosity of Liquids. The obtained results produced an AAD = 1.13% calculated on the entire dataset.
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New Equation for the Liquid Viscosity of Silanes
Journal of Thermophysics and Heat Transfer, 2017Co-Authors: Giovanni Di Nicola, Gianluca Coccia, Lorenza Malvagi, Mariano PierantozziAbstract:This work presents a new formula to calculate the Liquid Viscosity of the inorganic family of silicon-based molecules. As a first step, the raw Viscosity experimental data of silanes were collected...