Advancement of a Comprehensive Mechanistic CO2 Corrosion Model to Incorporate Simulated Hydrodynamics via a Turbulent Flow Model

In this work, a novel approach is introduced to derive functions for hydrodynamic parameters within mechanistic CO2 corrosion models using computational fluid dynamics (CFD) as a means of enhancing corrosion prediction models for complex geometries. A turbulent flow model is generated using CFD to predict the hydrodynamic boundary conditions in the near wall region. Utilizing dimensionless velocity and distance parameters, the height of the boundary layer is extracted, and an interpolation function is used to describe the change in the turbulent diffusivity between the corroding surface and bulk fluid. Within the same software, these parameters are fed into an established mechanistic corrosion model to predict the corrosion behavior. The application of this approach is shown in the context of a converging pipe flow, to examine the influence on the surface response. Further applications of the work are discussed in detail to demonstrate the versatility of the method and its potential for improving understanding of corrosion under complex flow conditions.