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00050 EFFECT OF BUBBLES ON MASS TRANSFER IN MULTIPHASE FLOW

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Product Number: 51300-00050-SG
ISBN: 00050 2000 CP
Author: Hongwei Wang, William Paul Jepson, Howard Dean Dewald, Ji-Yong Cai, Tao Hong and Madan Gopal
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In muitiphase flow, bubbles are produced and collapse on the solid/liquid interface. Bubble collapse can enhance the CO2 corrosion of carbon steel pipe, as shown by coupon surface analysis, corrosion rate measurements and visualization of bubble movement in multiphase flow. Using the electrochemical limiting current density technique, experiments have been carried out to study the effect of bubbles on mass transfer in an electrochemical cell and in slug flow. The limiting current density signal as a function of time and frequency shows the direct influence of bubble movement on mass transfer. It also indicates the difference of mass transfer in fully developed turbulent flow, an electrochemical cell and slug flow. The enhancement of mass transfer coefficient by bubble collapse is considered an important factor that contributes to the increased corrosion rate in multiphase flow. Keywords: slug flow, bubble, cavitation, mass transfer enhancement, CO2 corrosion, pipe
In muitiphase flow, bubbles are produced and collapse on the solid/liquid interface. Bubble collapse can enhance the CO2 corrosion of carbon steel pipe, as shown by coupon surface analysis, corrosion rate measurements and visualization of bubble movement in multiphase flow. Using the electrochemical limiting current density technique, experiments have been carried out to study the effect of bubbles on mass transfer in an electrochemical cell and in slug flow. The limiting current density signal as a function of time and frequency shows the direct influence of bubble movement on mass transfer. It also indicates the difference of mass transfer in fully developed turbulent flow, an electrochemical cell and slug flow. The enhancement of mass transfer coefficient by bubble collapse is considered an important factor that contributes to the increased corrosion rate in multiphase flow. Keywords: slug flow, bubble, cavitation, mass transfer enhancement, CO2 corrosion, pipe
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The effect of fluid flow on corrosion, or flow accelerated corrosion, is defined by mass transfer and wall shear stress parameters existing in the water phase contacting the solid wall. Jet impingement offers an experimental method to measure the effect of these parameters on corrosion.
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