Techniques of numerical simulation on mold filling process of casting are investigated in this paper. The mathematical model is formed on the ground of some selected theories in computational fluid dynamics (CFD), Numerical Heat Transfer (NHT) and computational methods to interfacial tracking. The discrete solution to the governing equations appeals to Finite Volume Method (FVM) on structured mesh. As for viscous turbulence flow and multiphase fluid flow in mold filling, engineering turbulence model and Volume of Fluid (VOF) method are adopted in the algorithms, respectively. As a debut, the general-purpose CFD software is used to establish the practicable mechanical model for the simulation. By means of numerical simulation, variation and distribution of velocity, temperature, stress and configuration of casting, etc. with respect to time and space in the filling process can be quantitatively analysed in detail, which is helpful for engineers to optimize their design of technics with less time and less cost and is meaningful to provide the subsequent simulation, solidification process of casting, with initial conditions.
In this paper, the mechanism, characteristics and categories about corrosion of offshore engineering equipments are investigated. Some of selected advanced surface engineering techniques for corrosion control are introduced. On account of particularity of oceanic environment and performance requirements for the equipments, the paper proposes corresponding anticorrosion measures for offshore engineering equipments. And as a tentative study on surface engineering management & analysis, the paper presents a scenario of anticorrosion design from the viewpoint of System Engineering, including preparation, storage and conveyance of anticorrosion materials, as well as R&D, operation, and management of anticorrosion facilities. It is expected that advanced surface engineering techniques used in anticorrosion can help offshore engineering equipments with good viabilities, perfect performances, low rate of failure, long life-time and high rate of readiness. Anticorrosion design of offshore engineering equipments is of far reaching importance not only to develop our Advanced Manufacturing Technology facing towards 21st century but also to implement sustainable development of our national economy, as well as to our national economy strength.
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