An improved CFD/experimental combined methodology for the calibration of empirical erosion models

Abstract

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Computational Fluid Dynamics Modelling of Liquid–Solid Slurry Flows in Pipelines: State-of-the-Art and Future Perspectives

“…This has been well documented, for instance, by Messa and co-workers [84]. An engineering effective compromise solution to overcome the inaccuracy of empirical comprehensive formulas taken from the literature and the high computational cost of a fully physical approach was the subject of the research work of different authors in the last ten years [92][93][94]. Such a method, which will be discussed in Section 4.3, consists in combining CFD and experimental results for highly accurate calibration of case-specific erosion models in slurry erosion calculations.…”

“…Fortunately, two alternatives are proposed by the former authors for fixing this without substantial modifications in existent codes. The more effective of the two, further developed in Messa et al [94], consists in extracting from the point-particle trajectory the parcel position, velocity and angle half particle diameter away from the wall, and take these values as the parcel-wall impingement characteristics to be used in the erosion calculations. Another strategy to overcome the inaccuracy associated with the point-particle treatment of the parcel-wall impingements was proposed by Zhang et al [124], which consists in employing different mesh sizes and different near-wall treatment methods according to the size of the particles.…”

“…Recently, Messa et al [94] have improved Mansouri's methodology to achieve higher accuracy of calibration and widen the scope. The main advancement arises from the consideration that, in CFD-based erosion prediction models which employ the Haider and Levenspiel drag coefficient correlation (Figure 12), particle shape is introduced via two different coefficients.…”

“…The two coefficients shall not be treated as independent of each other, since they represent the same geometrical feature of the granular material, and they are so difficult to quantify that, in the end, are often regarded as uncertainty parameters. So, the proposal of Messa et al [94] is to avoid the explicit appearance of F s and, if not enough information on the shape of the particles used in the test case is available to quantify ϕ, take the accuracy of calibration as a criterion not only to obtain the erosion model, but also to decide a suitable value of ϕ.…”

Numerical Simulation of Gas-Solid Two-Phase Erosion for Elbow and Tee Pipe in Gas Field

“…CFD has shown reliable performance in solving real-life problems, and it has been widely used in industrial applications. Therefore, CFD methods have gradually become one of the important methods for studying flow problems [12].…”