A MULTIPHASE, RIEMANN-SOLVER APPROACH TO GAS-CAVITATION

Andris Rambaks, H. Murrenhoff, K. Schmitz
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Abstract

In hydraulic systems, a certain amount of air is always present as entrained air in the form of gaseous bubbles and as dissolved air. Large amounts of entrained air negatively affect the behavior of hydraulic systems by decreasing the bulk modulus of the fluid and increasing the risk of cavitation damage, e.g., cavitation erosion and the microdiesel effect. The diffusion-driven growth of entrained gaseous bubbles surrounded by a liquid phase is referred to as gas-cavitation, in which dissolved air from the solution diffuses into the bubble. In the proposed paper, the diffusion-driven growth of a single gas bubble immersed in a liquid is examined. To that end, a comprehensive literature review, a mathematical description of the problem as well as the numerical implementation is presented.
气穴化的多相、黎曼求解方法
在液压系统中,一定量的空气总是以气泡的形式夹带空气和溶解空气的形式存在。大量夹带的空气会降低流体的体积模量,增加空化损伤的风险,例如空化侵蚀和微柴油效应,从而对液压系统的行为产生负面影响。被液相包围的夹带气泡的扩散驱动生长称为气穴化,其中溶解的空气从溶液中扩散到气泡中。本文研究了浸没在液体中的单个气泡的扩散驱动生长。为此,本文进行了全面的文献综述、问题的数学描述以及数值实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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