Numerical simulation of sea salt particulate matter adhesion on bridge surfaces by two-phase flow analysis

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  • 固気２相流解析による飛来塩分の付着シミュレーション

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Abstract

It is important to estimate corrosion environment of steel bridges for a proper corrosion prevention and maintenance program. Sea salt particulate matter (SS-PM) plays a critical role in a corrosion process of steel bridges. Generated by wind on the ocean, it flies some distance over land and attached itself on the bridge surface. Although the generation and flyover of SS-PM have been observed intensively, adhesion of SS-PM on bridge surface is yet to be investicated both experimentally and numerically, as adhesion of SS-PM occurs in a highly non-uniform manner. The objective of this work is to simulate the behavior of SS-PM near a bridge using Lagrangeian type multi-phase flow analysis. The results show that the Lagrangian approach provides with a useful tool for the understandings of the adhesion behaviors, though many are still to be studied in physics and chemistry of adhesion.

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