Browsing by Author "Miyara, Akio"

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    Distribution Of Two-Phase Flow In A Distributor
    (2016-04-14) Aziz, Azridjal; Miyara, Akio; Sugino, Fumiaki
    The flow configuration and distribution behavior of two-phase flow in a distributor made of acrylic resin have been investigated experimentally. In this study, air and water were used as two-phase flow working fluids. The distributor consists of one inlet and two outlets, which are set as upper and lower, respectively. The flow visualization at the distributor was made by using a high–speed camera. The flow rates of air and water flowing out from the upper and lower outlet branches were measured. Effects of inclination angle of the distributor were investigated. By changing the inclination angle from vertical to horizontal, uneven distributions were also observed. The distribution of two-phase flow through distributor tends even flow distribution on the vertical position and tends uneven distribution on inclined and horizontal positions. It is shown that even distribution could be achieved at high superficial velocities of both air and water
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    Uniformity of Two-phase Flow Distribution in Curved Round Distributor
    (2016-04-16) Mustaghfirin, Muh Anis; Miyara, Akio; Aziz, Azridjal; Sugino, Fumiaki
    Distributor plays a major role on uniformly of the fluid flow distribution through multiple channels, particularly in two phase flow. Uniformity and low pressure drop are the major issue which shall be solved. This study emphasized on the shape of branching points for two phase flow distributor to minimize mal-uniformity and pressure drop. The present distributor, the merge pipe distributor was developed to curved round distributor models with three types of reducer namely; curve reducer, T-reducer and straight reducer. The work was done thru investigating the performance of merge pipe distributor and comparing it to the performance of developed distributors. The analyses were performed through CFD modeling by using Fluent@ software, the two dimensional approach and high superficial velocity. It was founded that, the merged pipe distributor has tended to lack uniformity of phase distribution and slightly lower pressure drop than curved reducer distributor. While the curve round distributor models with T-reducer has exhibited better performance due to smaller pressure drop and optimum phase uniformity.
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    Visualization the Distribution of Air-Water Mixtures Flow in Two Outlet Distributor
    (2016-04-14) Aziz, Azridjal; Miyara, Akio
    This study presents an experimental investigation of air-water mixture distribution (gas and liquid phase) in a distributor. The distributor with one inlet and two outlet tubes branch, upper part and lower part is used with the aim that flow through it can be distributed evenly, particularly in two phase flow. The flow distribution was observed by a high-speed video camera and volumetric flow rates of air and water were measured for each outlet branches, respectively. Inclination angle effect of the distributor and flow rate of air and water flow pattern were investigated. It was found that through distributor, evenly distribution will occurs by the superficial velocity gas and liquid in large quantity. Water tends to flow out at the bottom, and air tends to flow out at the top of tube branch because effect of gravity and different fluid density. The distribution of two-phase flow through distributors tend unevenly flow distribution on the decrease of the angle of distributor, from vertical position to horizontal position.