A Combined Model for the Gaseous Mixture Past a Cylinder in Ablation Environment

Abstract

When a cylinder specimen lies in the gaseous mixture under high temperature and high pressure, the ablation and the denudation may appear on the cylinder surface, which will lead to the mass loss and shape alteration. A combined model is developed for solving the mass loss rate resulted from the ablation and the denudation. In this model, three chemical formulas and ablation mechanism are presented to evaluate the mass loss rate; the core-spread vortex method is used to analyze the flow around the cylinder; and the particle trajectory equation is given to explore the traces of denudation particles. To obtain the mass loss rate of the cylinder in the two-phase flow, the simulations are performed well by using the written codes. Numerical results show that the Re number of gaseous mixture exerts significant effects on both the vortex street and the ablation rate. Furthermore, it is found that the vorticity determines the motion and distribution of denudation particles.

Simulation of co-rotating vortices based on compressible vortex method

“…The vortex method is a direct numerical simulation method for solving the N-S equations in a Lagrange scheme, which has an extensive application prospect in combustion, reacting flow, two-phase flow, or magnetic fields (Ivan et al, 2013;Huang and Xu, 2011;Sahu and Patnaik, 2011), e.g. Singha and Sinhamahapatra (2011) studied the effect of a magnetic field on vortex shedding using a implicit unstructured grid finite volume method.…”

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“…Huang et al [3,4] established a model of flow past ablation blunt with moving boundary by deterministic vortex method. But the deterministic vortex method is mainly used in simulation of flow past a single object.…”

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