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98689 Combined BEM Analysis of 3D and Axisymmetric Regions for Cathodic Protection Design of Seawater Pump

Product Number: 51300-98689-SG
ISBN: 98689 1998 CP
Author: M. Miyasaka, H. Takayama, K. Amaya, S. Aoki
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An effective boundary element method is developed for predicting corrosion and corrosion protection of a complicated structure. In this method, the region to be analyzed is divided at first into a target sub-region and other adjacent sub-regions. Then, equivalent- boundary- condition related to an adjacent sub-region, which is defined as the relationship between the potential and the current density on the interface dividing the adjacent end the target sub-region, is obtained by analyzing the adjacent sub-region with an appropriate model, e.g., a closed 3D model or an open axisymmetric model. Finally, the target sub-region is analyzed using these equivalent-boundary-conditions with an appropriate model, which can be of a type different from those for the adjacent other sub-regions. It is easy for this method to perform a trial and error type design of the target sub-region, because the same equivalent- boundary- conditions ean be used repeatedly. An example analysis is carried out for a cathodic protection system of seawater pump to demonstrate the wumey ad usefulness of this combined method. Keywords: boundary element method (BEM), combined analysis, 2D, 3D, axisymmetry, potential, current density, cathodic protection, galvanic corrosion, polarization curve, seawater, pump
An effective boundary element method is developed for predicting corrosion and corrosion protection of a complicated structure. In this method, the region to be analyzed is divided at first into a target sub-region and other adjacent sub-regions. Then, equivalent- boundary- condition related to an adjacent sub-region, which is defined as the relationship between the potential and the current density on the interface dividing the adjacent end the target sub-region, is obtained by analyzing the adjacent sub-region with an appropriate model, e.g., a closed 3D model or an open axisymmetric model. Finally, the target sub-region is analyzed using these equivalent-boundary-conditions with an appropriate model, which can be of a type different from those for the adjacent other sub-regions. It is easy for this method to perform a trial and error type design of the target sub-region, because the same equivalent- boundary- conditions ean be used repeatedly. An example analysis is carried out for a cathodic protection system of seawater pump to demonstrate the wumey ad usefulness of this combined method. Keywords: boundary element method (BEM), combined analysis, 2D, 3D, axisymmetry, potential, current density, cathodic protection, galvanic corrosion, polarization curve, seawater, pump
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