The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Chao Yang - One of the best experts on this subject based on the ideXlab platform.
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experimental study on the Dispersed Phase macro mixing in an immiscible liquid liquid stirred reactor
Chemical Engineering Science, 2015Co-Authors: Dang Cheng, Xin Feng, Jingcai Cheng, Chao YangAbstract:Abstract The spatial nonuniformity of solute concentration in the Dispersed Phase of immiscible liquid–liquid dispersion is smeared out by coalescence and breakup of drops, which has a very significant effect on the productivity of relevant chemical processes. Novel experiments have been designed to visualize and quantify accurately the macro-mixing within the Dispersed Phase using the planar laser induced fluorescence (PLIF) method combined with a refractive index matching technique in this work. Batch experiments are carried out in a stirred reactor for an electrolytic solution Dispersed in silicone oil. It is revealed that the Dispersed Phase macro-mixing behavior differs much from that of the continuous Phase of multiPhase systems and is heavily dependent upon the drop interaction rate and thus power consumption. The Dispersed Phase mixing time decreases with the increase of the Dispersed Phase volume fraction. Dispersed Phase mixing time varies inversely with the power consumption per unit volume dispersion. The effect of impeller type on the Dispersed Phase mixing time is greatly different from that on the continuous/single Phase mixing time. The effect of radial impeller clearance on the Dispersed Phase mixing time is contrary to that on the continuous/single Phase mixing time.
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Experimental study on the Dispersed Phase macro-mixing in an immiscible liquid–liquid stirred reactor
Chemical Engineering Science, 2015Co-Authors: Dang Cheng, Xin Feng, Jingcai Cheng, Chao YangAbstract:Abstract The spatial nonuniformity of solute concentration in the Dispersed Phase of immiscible liquid–liquid dispersion is smeared out by coalescence and breakup of drops, which has a very significant effect on the productivity of relevant chemical processes. Novel experiments have been designed to visualize and quantify accurately the macro-mixing within the Dispersed Phase using the planar laser induced fluorescence (PLIF) method combined with a refractive index matching technique in this work. Batch experiments are carried out in a stirred reactor for an electrolytic solution Dispersed in silicone oil. It is revealed that the Dispersed Phase macro-mixing behavior differs much from that of the continuous Phase of multiPhase systems and is heavily dependent upon the drop interaction rate and thus power consumption. The Dispersed Phase mixing time decreases with the increase of the Dispersed Phase volume fraction. Dispersed Phase mixing time varies inversely with the power consumption per unit volume dispersion. The effect of impeller type on the Dispersed Phase mixing time is greatly different from that on the continuous/single Phase mixing time. The effect of radial impeller clearance on the Dispersed Phase mixing time is contrary to that on the continuous/single Phase mixing time.
Jeanyves Billard - One of the best experts on this subject based on the ideXlab platform.
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two Phase couette taylor flow arrangement of the Dispersed Phase and effects on the flow structures
Physics of Fluids, 2004Co-Authors: Henda Djeridi, Celine Gabillet, Jeanyves BillardAbstract:This study investigates the mutual interactions between a continuous and a Dispersed Phase~noncondensable or condensable! in the well-known Couette–Taylor flow between two concentric cylinders at low Reynolds numbers, where the outer cylinder is immobilized. In this experiment, the turbulent structures take place progressively. The noncondensable Dispersed Phase ~air! is introduced either by ventilation, generated by agitation of a free surface situated at the top of the gap between the two cylinders. The condensable Dispersed Phase is generated by cavitation due to a drop in pressure. Comparisons are made between the single Phase flow patterns and those observed in ventilated or cavitating flow. Two particular arrangements of the Dispersed Phase are experimentally evident, according to the Reynolds number of the flow. For low Reynolds numbers, bubbles are trapped in the core of the Taylor cells, whereas they migrate to the outflow regions near the inner cylinder for higher Reynolds numbers. Assessment of the forces applied to the bubbles and computation of their equilibrium position can act as a base in describing the bubble capture. When bubbles are located near the wall in the outflow region, it is found that the three first instabilities are strongly influenced by the Dispersed Phase. The cavitating flow is also characterized by an earlier appearance of the third instability.
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Two-Phase Couette–Taylor flow: Arrangement of the Dispersed Phase and effects on the flow structures
Physics of Fluids, 2004Co-Authors: Henda Djeridi, Celine Gabillet, Jeanyves BillardAbstract:This study investigates the mutual interactions between a continuous and a Dispersed Phase~noncondensable or condensable! in the well-known Couette–Taylor flow between two concentric cylinders at low Reynolds numbers, where the outer cylinder is immobilized. In this experiment, the turbulent structures take place progressively. The noncondensable Dispersed Phase ~air! is introduced either by ventilation, generated by agitation of a free surface situated at the top of the gap between the two cylinders. The condensable Dispersed Phase is generated by cavitation due to a drop in pressure. Comparisons are made between the single Phase flow patterns and those observed in ventilated or cavitating flow. Two particular arrangements of the Dispersed Phase are experimentally evident, according to the Reynolds number of the flow. For low Reynolds numbers, bubbles are trapped in the core of the Taylor cells, whereas they migrate to the outflow regions near the inner cylinder for higher Reynolds numbers. Assessment of the forces applied to the bubbles and computation of their equilibrium position can act as a base in describing the bubble capture. When bubbles are located near the wall in the outflow region, it is found that the three first instabilities are strongly influenced by the Dispersed Phase. The cavitating flow is also characterized by an earlier appearance of the third instability.
Dang Cheng - One of the best experts on this subject based on the ideXlab platform.
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experimental study on the Dispersed Phase macro mixing in an immiscible liquid liquid stirred reactor
Chemical Engineering Science, 2015Co-Authors: Dang Cheng, Xin Feng, Jingcai Cheng, Chao YangAbstract:Abstract The spatial nonuniformity of solute concentration in the Dispersed Phase of immiscible liquid–liquid dispersion is smeared out by coalescence and breakup of drops, which has a very significant effect on the productivity of relevant chemical processes. Novel experiments have been designed to visualize and quantify accurately the macro-mixing within the Dispersed Phase using the planar laser induced fluorescence (PLIF) method combined with a refractive index matching technique in this work. Batch experiments are carried out in a stirred reactor for an electrolytic solution Dispersed in silicone oil. It is revealed that the Dispersed Phase macro-mixing behavior differs much from that of the continuous Phase of multiPhase systems and is heavily dependent upon the drop interaction rate and thus power consumption. The Dispersed Phase mixing time decreases with the increase of the Dispersed Phase volume fraction. Dispersed Phase mixing time varies inversely with the power consumption per unit volume dispersion. The effect of impeller type on the Dispersed Phase mixing time is greatly different from that on the continuous/single Phase mixing time. The effect of radial impeller clearance on the Dispersed Phase mixing time is contrary to that on the continuous/single Phase mixing time.
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Experimental study on the Dispersed Phase macro-mixing in an immiscible liquid–liquid stirred reactor
Chemical Engineering Science, 2015Co-Authors: Dang Cheng, Xin Feng, Jingcai Cheng, Chao YangAbstract:Abstract The spatial nonuniformity of solute concentration in the Dispersed Phase of immiscible liquid–liquid dispersion is smeared out by coalescence and breakup of drops, which has a very significant effect on the productivity of relevant chemical processes. Novel experiments have been designed to visualize and quantify accurately the macro-mixing within the Dispersed Phase using the planar laser induced fluorescence (PLIF) method combined with a refractive index matching technique in this work. Batch experiments are carried out in a stirred reactor for an electrolytic solution Dispersed in silicone oil. It is revealed that the Dispersed Phase macro-mixing behavior differs much from that of the continuous Phase of multiPhase systems and is heavily dependent upon the drop interaction rate and thus power consumption. The Dispersed Phase mixing time decreases with the increase of the Dispersed Phase volume fraction. Dispersed Phase mixing time varies inversely with the power consumption per unit volume dispersion. The effect of impeller type on the Dispersed Phase mixing time is greatly different from that on the continuous/single Phase mixing time. The effect of radial impeller clearance on the Dispersed Phase mixing time is contrary to that on the continuous/single Phase mixing time.
Thierry Lasuye - One of the best experts on this subject based on the ideXlab platform.
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turbulent liquid liquid dispersion in smv static mixer at high Dispersed Phase concentration
Chemical Engineering Science, 2011Co-Authors: Emeline Lobry, Felicie Theron, Christophe Gourdon, Nathalie Le Sauze, Catherine Xuereb, Thierry LasuyeAbstract:The aim of this paper is to investigate the influence of physico-chemical parameters on liquid–liquid dispersion at high Dispersed Phase concentration in Sulzer SMV™ mixer. Four different oil-in-water systems involving two different surfactants are used in order to evaluate the effect of interfacial tension, densities and viscosities ratio on mean droplets size diameters. Moreover the influence of the Dispersed Phase concentration on the pressure drop as well as on the droplet size distribution is investigated. Two different droplets size distribution analysis techniques are used in order to compare the resulting Sauter mean diameters. The comparison between residence time in the mixer and surfactants adsorption kinetics leads to take into account the evolution of the interfacial tension between both Phases at short times. Finally experimental results are correlated as a function of dimensionless Reynolds and Weber numbers.
Jingcai Cheng - One of the best experts on this subject based on the ideXlab platform.
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experimental study on the Dispersed Phase macro mixing in an immiscible liquid liquid stirred reactor
Chemical Engineering Science, 2015Co-Authors: Dang Cheng, Xin Feng, Jingcai Cheng, Chao YangAbstract:Abstract The spatial nonuniformity of solute concentration in the Dispersed Phase of immiscible liquid–liquid dispersion is smeared out by coalescence and breakup of drops, which has a very significant effect on the productivity of relevant chemical processes. Novel experiments have been designed to visualize and quantify accurately the macro-mixing within the Dispersed Phase using the planar laser induced fluorescence (PLIF) method combined with a refractive index matching technique in this work. Batch experiments are carried out in a stirred reactor for an electrolytic solution Dispersed in silicone oil. It is revealed that the Dispersed Phase macro-mixing behavior differs much from that of the continuous Phase of multiPhase systems and is heavily dependent upon the drop interaction rate and thus power consumption. The Dispersed Phase mixing time decreases with the increase of the Dispersed Phase volume fraction. Dispersed Phase mixing time varies inversely with the power consumption per unit volume dispersion. The effect of impeller type on the Dispersed Phase mixing time is greatly different from that on the continuous/single Phase mixing time. The effect of radial impeller clearance on the Dispersed Phase mixing time is contrary to that on the continuous/single Phase mixing time.
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Experimental study on the Dispersed Phase macro-mixing in an immiscible liquid–liquid stirred reactor
Chemical Engineering Science, 2015Co-Authors: Dang Cheng, Xin Feng, Jingcai Cheng, Chao YangAbstract:Abstract The spatial nonuniformity of solute concentration in the Dispersed Phase of immiscible liquid–liquid dispersion is smeared out by coalescence and breakup of drops, which has a very significant effect on the productivity of relevant chemical processes. Novel experiments have been designed to visualize and quantify accurately the macro-mixing within the Dispersed Phase using the planar laser induced fluorescence (PLIF) method combined with a refractive index matching technique in this work. Batch experiments are carried out in a stirred reactor for an electrolytic solution Dispersed in silicone oil. It is revealed that the Dispersed Phase macro-mixing behavior differs much from that of the continuous Phase of multiPhase systems and is heavily dependent upon the drop interaction rate and thus power consumption. The Dispersed Phase mixing time decreases with the increase of the Dispersed Phase volume fraction. Dispersed Phase mixing time varies inversely with the power consumption per unit volume dispersion. The effect of impeller type on the Dispersed Phase mixing time is greatly different from that on the continuous/single Phase mixing time. The effect of radial impeller clearance on the Dispersed Phase mixing time is contrary to that on the continuous/single Phase mixing time.