The Experts below are selected from a list of 104406 Experts worldwide ranked by ideXlab platform

Akira Kariyasaki - One of the best experts on this subject based on the ideXlab platform.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

Toshiyuki Sanada - One of the best experts on this subject based on the ideXlab platform.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

Tohru Fukano - One of the best experts on this subject based on the ideXlab platform.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

Masao Watanabe - One of the best experts on this subject based on the ideXlab platform.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

  • behavior of a single coherent gas bubble chain and surrounding liquid Jet Flow structure
    Chemical Engineering Science, 2005
    Co-Authors: Toshiyuki Sanada, Tohru Fukano, Masao Watanabe, Akira Kariyasaki
    Abstract:

    Abstract The motion of a single nitrogen gas bubble chain and the structure of water Flow field surrounding the chain were experimentally studied. We developed a bubble generator that can control both the bubble diameter and the generation frequency independently. Experimental conditions of bubble Reynolds number and bubble distance divided by bubble diameter were from 300 to 650 and from 6.5 to 300, respectively. We discuss the interaction effects on the motion of each bubble rising in a chain, as compared to the effects of a single rising bubble. The bubble trajectories and the surrounding water Flow fields in the state of bubbles rising in a chain were investigated using a high-speed digital video camera and an analog single-lens-reflex camera. We observed two important physical phenomena. First, bubbles passed through a nearly identical path in the case of low frequency of bubble production. On the contrary, at a height of approximately 50 mm from the nozzle, the bubbles in the case of high frequency deviated and scattered from this path due to bubble–bubble interaction. Second, with higher bubble production frequency, coherent bubble chain and the characteristic structure of the surrounding water Flow called “liquid Jet” were observed near the nozzle. The direction of liquid Jet Flow differed from the bubble trajectory. We theoretically investigated the relation of coherent bubble chain and liquid Jet by applying the conservation of liquid momentum.

Shengqiang Shen - One of the best experts on this subject based on the ideXlab platform.

  • 3d numerical study of the liquid film distribution on the surface of a horizontal tube falling film evaporator
    International Journal of Heat and Mass Transfer, 2018
    Co-Authors: Xiaocui Zhang, Shenglin Quan, Shengqiang Shen
    Abstract:

    Abstract In this paper, the volume-of-fluid (VOF) model is adopted to simulate the distribution and Flow of a liquid film on the outer surface of the horizontal tube of a falling-film evaporator. The plain tube diameter and the spray distance are 25.4 and 22 mm respectively. The temporal variation characteristics of inline Jet Flow, the adjacent liquid column, and the steady-state film thickness distribution over the horizontal tubes are analyzed. To better compare with the experimental results, two kinds of numerical simulation medium, water and ethylene glycol, are chosen. The results of the 3-D numerical simulations and experiment are in good agreement. The results show that the Jet Flow can be divided into inline Jet Flow and staggered Jet Flow. Furthermore, a trough forms between the adjacent liquid columns under inline Jet Flow, whereas a crest forms between the adjacent liquid columns under staggered Jet Flow. In addition, the liquid viscosity is a crucial factor affecting the spreading of the liquid film. The appearance of the crest between adjacent liquid columns results in staggered Jet Flow.