Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously. Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow . The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible. In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution . The results show the flow structure both outside and inside of a falling water droplet in the stationary oil simultaneously .
In order to minimize the wind noise generated by a Sirocco fan, it is most important to understan... more In order to minimize the wind noise generated by a Sirocco fan, it is most important to understand the details of the flow field about a Sirocco fan. As the shape of a Sirocco fan is very complicated, it has not been very easy to capture the flow patterns. Presently, the authors have utilized the spark tracing method to visualize the flow field around a Sirocco fan and have observed the flow patterns between the blades with and without the intake load. It has been proved that the intake load causes the drastic changes on the inflow pattern and thus the changes of the flow pattern, which might be the major cause of noise, in the scroll chamber. In order to visualize the flow pattern between the blades of a rotating fan, presently the visualized images have been rotated digitally, instead of using complex image rotator such as Pecham prism.
In order to minimize the wind noise generated by a Sirocco fan, it is most important to understan... more In order to minimize the wind noise generated by a Sirocco fan, it is most important to understand the details of the flow field about a Sirocco fan. As the shape of a Sirocco fan is very complicated, it has not been very easy to capture the flow patterns. Presently, the authors have utilized the spark tracing method to visualize the flow field around a Sirocco fan and have observed the flow patterns between the blades with and without the intake load. It has been proved that the intake load causes the drastic changes on the inflow pattern and thus the changes of the flow pattern, which might be the major cause of noise, in the scroll chamber. In order to visualize the flow pattern between the blades of a rotating fan, presently the visualized images have been rotated digitally, instead of using complex image rotator such as Pecham prism.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously. Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible. In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously. Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible. In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously . Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible . In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously . Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible . In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously. Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow . The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible. In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution . The results show the flow structure both outside and inside of a falling water droplet in the stationary oil simultaneously .
In order to minimize the wind noise generated by a Sirocco fan, it is most important to understan... more In order to minimize the wind noise generated by a Sirocco fan, it is most important to understand the details of the flow field about a Sirocco fan. As the shape of a Sirocco fan is very complicated, it has not been very easy to capture the flow patterns. Presently, the authors have utilized the spark tracing method to visualize the flow field around a Sirocco fan and have observed the flow patterns between the blades with and without the intake load. It has been proved that the intake load causes the drastic changes on the inflow pattern and thus the changes of the flow pattern, which might be the major cause of noise, in the scroll chamber. In order to visualize the flow pattern between the blades of a rotating fan, presently the visualized images have been rotated digitally, instead of using complex image rotator such as Pecham prism.
In order to minimize the wind noise generated by a Sirocco fan, it is most important to understan... more In order to minimize the wind noise generated by a Sirocco fan, it is most important to understand the details of the flow field about a Sirocco fan. As the shape of a Sirocco fan is very complicated, it has not been very easy to capture the flow patterns. Presently, the authors have utilized the spark tracing method to visualize the flow field around a Sirocco fan and have observed the flow patterns between the blades with and without the intake load. It has been proved that the intake load causes the drastic changes on the inflow pattern and thus the changes of the flow pattern, which might be the major cause of noise, in the scroll chamber. In order to visualize the flow pattern between the blades of a rotating fan, presently the visualized images have been rotated digitally, instead of using complex image rotator such as Pecham prism.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously. Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible. In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously. Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible. In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously . Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible . In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
Although the phenomena related to the multiphase flow can be found in many kinds of industrial an... more Although the phenomena related to the multiphase flow can be found in many kinds of industrial and engineering applications, the physical mechanism of the multiphase flow has not been investigated in detail. The major reason for the lack of data in the multiphase flow lies in the difficulties in measuring the flow quantities of the multiple phases simultaneously . Presently, the simultaneous visualization and the PIV measurement have been carried out about the both phases of the liquid-liquid two-phase flow. The difference in the refractive indices makes the visualization in the vicinity of the boundary of the multiple phases almost impossible . In this study, the refractive index of the aqueous phase has been equalized to that of the oil phase by adjusting the concentration of aqueous solution. The PIV measurement has been carried out for the flow field around and inside of two falling droplets interacting each other while they travel.
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Papers by Nao Ninomiya