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Dissipation of shock wave in a gas-droplet mixture by droplet fragmentation

机译:液滴碎裂消散气体混合物中的冲击波

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In this paper, we investigate the shock wave dissipation in a gas-droplet mixture over a wedge. A similar gas-droplet mixture had been considered earlier but this time we take account of breakup of the large droplets and see how the shock wave is affected. We consider a droplet breakup model dependent on the critical Weber number and add the equation of droplet number density evolution to the compressible two-fluid model. The viscous drag force, the heat transfer, and the phase change of the droplets are all included in the present model for interaction between phases. The fractional step method is used to solve the two-fluid governing equations in two parts: the hyperbolic operator is solved by the second-order WAF-HLL scheme and the source operator by the fourth-order Runge-Kutta method. We elaborate how the shock dissipation and pressure distribution is affected by the droplet size and droplet volume fraction.
机译:在本文中,我们研究了楔形物上的气滴混合物中的冲击波消散。较早时曾考虑过类似的气体混合物,但这次我们考虑了大液滴的破裂,并观察了冲击波如何受到影响。我们考虑取决于临界韦伯数的液滴分裂模型,并将液滴数密度演化方程添加到可压缩的双流体模型中。粘性阻力,热传递和液滴的相变都包含在本模型中,以实现相之间的相互作用。分步法用于求解两部分控制方程,分为两部分:双曲算子通过二阶WAF-HLL方案求解,源算子通过四阶Runge-Kutta方法求解。我们阐述了液滴大小和体积分数如何影响冲击消散和压力分布。

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