Investigation of the chemical vapor deposition of Cu from copper amidinate through data driven efficient CFD modelling

peer reviewedA chemical reaction model, consisting of two gas-phase and a surface reaction, for the deposition of copper from copper amidinate is investigated, by comparing results of an efficient, reduced order CFD model with experiments. The film deposition rate over a wide range of temperatures, 473K-623K, is accurately captured, focusing specifically on the reported drop of the deposition rate at higher temperatures, i.e above 553K that has not been widely explored in the literature. This investigation is facilitated by an efficient computational tool that merges equation-based analysis with data-driven reduced order modeling and artificial neural networks. The hybrid computer-aided approach is necessary in order to address, in a reasonable time-frame, the complex chemical and physical phenomena developed in a three-dimensional geometry that corresponds to the experimental set-up. It is through this comparison between the experiments and the derived simulation results, enabled by machine-learning algorithms that the prevalent theoretical hypothesis is tested and validated, illuminating the possible underlying dominant phenomena

Fouling investigation via CFD modeling of annular multiphase flows during underbalanced drilling (UBD)

Summarization: Underbalanced drilling (UBD) is a modern oil and gas well drilling technology: therein, wellbore pressure is kept lower than the fluid pressure in the formation being drilled and flow geometry is an annulus positioned at vertical, inclined or horizontal orientation. While technical challenges for vertical UBD cuttings transport have been addressed, several unresolved problems remain for multiphase solid-liquid (SL) and solid-liquid-gas (SLG) flows along horizontal and inclined conduits. Liquid velocity, solids loading, physical properties, inclination angle and conduit shape and size are the main determinant parameters towards flow assurance and fouling prevention. CFD modeling of formation rock cuttings transport during UBD drilling operations has strong predictive potential which has not been hitherto harnessed to analyze, design and optimize safe UBD drilling operations. This paper will present and discuss case studies on steady-state multiphase CFD modeling and the resulting UBD state variable distributions as a function of annular configuration geometry.Παρουσιάστηκε στο: Materials Aspects of Corrosion and Fouling in Oil Refining and Exploratio