A limited number of studies are available in literature on the small bubbles which create from gas-very high viscosity oils interaction and its contribution to gas holdup system. The rate bubble formation has an important impact heat mass transfer many chemical industrial processes. work presented current paper provides unique information millimetre diameter oil. column 290 mm Silicon oil 330 P...

This article develops the point that incentive and risk-bearing problems associated with contractual holdup may justify legal intervention. Contractual holdup is considered both for fresh contracts and for modifications of contracts. One type of legal intervention is flat voiding of contracts. Such intervention tends to be advantageous when holdup situations are engineered. Another type of inte...

â understanding the flow behaviour in a gas well is crucial for future production strategies, obtaining bottomhole conditions from wellhead production data, analyzing production data and estimating reservoir properties. in this work, the pressure profile and flow regime are studied on four wells of a multi-well, multi-layer gas-condensate reservoir, producing at high rate. the wells are deviate...

A large number of bubbles generated by the air agitation device in an external melting ice storage system can cause disturbance ice–water mixture, which enhance heat transfer and contribute to reduction energy consumption. The structural design optimization is key issue for savings. In this study, influence different orifice spacings diameters on distribution gas–liquid flow field, gas holdup, ...

Solids holdup as one of the main parameters in characterizing performance fluidized bed reactors is widely concerned. With its development and improvement, visualization technology has been applied fluidization because little disturbance to flow. In this study, four types particles with different properties are tested a narrow rectangular equipped high-speed video camera. Calibration curves the...

Oxygen gas-liquid mass transfer coefficient was measured in a gas-induced pulsating flow bubble column. Pulsating amplitude had a great influence on kla under pulsating state of equal base flow and pulsating flow, which was enhanced up to 30 % compared with that under steady state; however, it had a negative effect on mass transfer under a fixed low base flow. It was also found that kla had a n...