The Experts below are selected from a list of 76002 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.
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.
Hun-kuk Park - One of the best experts on this subject based on the ideXlab platform.
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Spatiotemporal patterns of neural activity in response to electroacupuncture stimulation in the rodent primary somatosensory cortex.
Neurological Research, 2010Co-Authors: Younbyoung Chae, Hi-joon Park, Dae-hyun Hahm, Hun-kuk ParkAbstract:Abstract Objectives: Optical imaging technique enables the recording of cortical activities in multiple sites of the primary somatosensory cortex in real time. The present study was aimed to visualize neural activity in response to the acupuncture stimulation in the rodent primary somatosensory cortex by a high-resolution optical imaging system using voltage-sensitive dyes. Methods: Optical imaging was exploited to examine the temporal–Spatial Characteristic of rat primary somatosensory cortex during electroacupuncture stimulation (6 mA intensity and 2 ms duration) at two pairs of acupuncture points (ST36-SP6 or GB34-BL57). Results: In terms of magnitude and duration of the optical response, there was no difference between ST36-SP6 and GB34-BL57 stimulations. Maximally activated sites by electroacupuncture stimulation to the different acupuncture points were Spatially differentiated in rat primary somatosensory cortex. Discussion: The results indicate that neuronal responses to electroacupuncture stimulat...
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Spatiotemporal patterns of neural activity in response to electroacupuncture stimulation in the rodent primary somatosensory cortex.
Neurological research, 2010Co-Authors: Younbyoung Chae, Hi-joon Park, Dae-hyun Hahm, Hun-kuk ParkAbstract:Optical imaging technique enables the recording of cortical activities in multiple sites of the primary somatosensory cortex in real time. The present study was aimed to visualize neural activity in response to the acupuncture stimulation in the rodent primary somatosensory cortex by a high-resolution optical imaging system using voltage-sensitive dyes. Optical imaging was exploited to examine the temporal-Spatial Characteristic of rat primary somatosensory cortex during electroacupuncture stimulation (6 mA intensity and 2 ms duration) at two pairs of acupuncture points (ST36-SP6 or GB34-BL57). In terms of magnitude and duration of the optical response, there was no difference between ST36-SP6 and GB34-BL57 stimulations. Maximally activated sites by electroacupuncture stimulation to the different acupuncture points were Spatially differentiated in rat primary somatosensory cortex. The results indicate that neuronal responses to electroacupuncture stimulation can be visualized in rat primary somatosensory cortex using an optical imaging system. The topographical mapping of acupuncture points in primary somatosensory cortex will make a significant contribution to the understanding of neural mechanisms of the acupuncture treatment and Meridian phenomena.
Ruibo Fang - One of the best experts on this subject based on the ideXlab platform.
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Identification of ecosystem services supply and demand areas and simulation of ecosystem service flows in Shanghai
Ecological Indicators, 2020Co-Authors: Yishao Shi, Donghui Shi, Liangliang Zhou, Ruibo FangAbstract:Abstract In this paper, ecosystem service flow was defined as a dynamic process in which the supply of ecosystem services in a certain region compensates for the demand in other regions with the remaining ecosystem services after meeting its own demand. This process follows the principle of minimum distance. We selected four typical ecosystem services: food supply (supply services), carbon absorption and oxygen release (regulation services), leisure and entertainment (cultural services) and biological habitat preservation (support services). According to the Characteristics of the various ecological services, we adopted different methods and indicators to quantitatively evaluate the supply and demand situation and to identify the supply and demand areas of ecosystem services at the level of towns and streets. The Exploratory Spatial Data Analysis Method (ESDA) was used to reveal the Spatial clustering models of the supplies and demands of various ecosystem services. A linear programming model was used to simulate the flow direction and flow rate of ecosystem service flow. The results showed the following: (1) All ecosystem services in Shanghai were in short supply and depended heavily on the supply of ecological services outside the city. (2) The supply of various ecosystem services presented the Spatial Characteristic of “central city - inner suburbs - outer suburbs” corresponding to “low-value clustering - discrete distribution - high-value clustering”. (3) The ecosystem services transferred to compensate Shanghai formed flow of the ecosystem service from the outer suburbs to the central urban area, which were dominated by carbon sequestration and oxygen release and the preservation of biological habitats. (4) Within the scope of Shanghai, the priority areas for ecological space conservation, restoration and expansion should be the central city and the inner suburbs, not just the outer suburbs.
Younbyoung Chae - One of the best experts on this subject based on the ideXlab platform.
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Spatiotemporal patterns of neural activity in response to electroacupuncture stimulation in the rodent primary somatosensory cortex.
Neurological Research, 2010Co-Authors: Younbyoung Chae, Hi-joon Park, Dae-hyun Hahm, Hun-kuk ParkAbstract:Abstract Objectives: Optical imaging technique enables the recording of cortical activities in multiple sites of the primary somatosensory cortex in real time. The present study was aimed to visualize neural activity in response to the acupuncture stimulation in the rodent primary somatosensory cortex by a high-resolution optical imaging system using voltage-sensitive dyes. Methods: Optical imaging was exploited to examine the temporal–Spatial Characteristic of rat primary somatosensory cortex during electroacupuncture stimulation (6 mA intensity and 2 ms duration) at two pairs of acupuncture points (ST36-SP6 or GB34-BL57). Results: In terms of magnitude and duration of the optical response, there was no difference between ST36-SP6 and GB34-BL57 stimulations. Maximally activated sites by electroacupuncture stimulation to the different acupuncture points were Spatially differentiated in rat primary somatosensory cortex. Discussion: The results indicate that neuronal responses to electroacupuncture stimulat...
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Spatiotemporal patterns of neural activity in response to electroacupuncture stimulation in the rodent primary somatosensory cortex.
Neurological research, 2010Co-Authors: Younbyoung Chae, Hi-joon Park, Dae-hyun Hahm, Hun-kuk ParkAbstract:Optical imaging technique enables the recording of cortical activities in multiple sites of the primary somatosensory cortex in real time. The present study was aimed to visualize neural activity in response to the acupuncture stimulation in the rodent primary somatosensory cortex by a high-resolution optical imaging system using voltage-sensitive dyes. Optical imaging was exploited to examine the temporal-Spatial Characteristic of rat primary somatosensory cortex during electroacupuncture stimulation (6 mA intensity and 2 ms duration) at two pairs of acupuncture points (ST36-SP6 or GB34-BL57). In terms of magnitude and duration of the optical response, there was no difference between ST36-SP6 and GB34-BL57 stimulations. Maximally activated sites by electroacupuncture stimulation to the different acupuncture points were Spatially differentiated in rat primary somatosensory cortex. The results indicate that neuronal responses to electroacupuncture stimulation can be visualized in rat primary somatosensory cortex using an optical imaging system. The topographical mapping of acupuncture points in primary somatosensory cortex will make a significant contribution to the understanding of neural mechanisms of the acupuncture treatment and Meridian phenomena.