| 用改进的ghost fluid方法模拟强激波与界面的相互作用 |
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| 引用本文： | 陈荣三,盛万成.用改进的ghost fluid方法模拟强激波与界面的相互作用[J].爆炸与冲击,2008,28(2):144-148. |
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| 作者姓名： | 陈荣三 盛万成 |
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| 作者单位： | 1.上海大学数学系,上海 200444 |
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| 摘 要： | 为了解决原来的ghost fluid方法在计算强激波和界面相互作用时界面附近出现的速度和压力振荡问题，对原来的ghost fluid方法进行了改进，通过在界面处构造Riemann问题并求出界面的压力和速度，ghost fluid流体的压力和速度分别用界面的压力和速度代替,ghost流体的密度通过熵常数外推得到。改进的ghost fluid保持了原来的ghost fluid的简单性，对一维强激波与气-气、气-液界面的相互作用问题以及射流问题进行了数值计算，得到了分辨率较高的计算结果。
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| 关 键 词： | 流体力学 改进的ghost fluid方法 Riemann问题 强激波 |
| 文章编号： | 1001-1455(2008)02-0144-05 |
| 修稿时间： | 2006年9月15日 |
A modified ghost fluid method for strong shock wave impacting on material interface |
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| CHEN Rong-san,SHENG Wan-cheng.A modified ghost fluid method for strong shock wave impacting on material interface[J].Explosion and Shock Waves,2008,28(2):144-148. |
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| Authors: | CHEN Rong-san SHENG Wan-cheng |
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| Institution: | 1.Department of Mathematics, Shanghai University, Shanghai 200444, China |
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| Abstract: | A modified ghost fluid method is developed to avoid the oscillations of pressure and velocity at the interface when the original ghost fluid method(GFM)is applied to a strong shock wave impacting on a material interface.The pressure and velocity of the ghost fluid are replaced respectively by the pressure and velocity of the interface which are obtained by solving a Riemann problem,the density of the ghost fluid is gained by extrapolating the entropy constant.The modified GFM keeps to the simplicity of the original GFM.Numerical tests are carried out by using the modified GFM for a one-dimensional strong shock wave impacting on the gas-gas,gas-liquid interfaces and a jet impacting on the gas-liquid interface.The satisfactory results are achieved. |
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| Keywords: | fluid mechanics modified ghost fluid method Riemann problem strong shock wave |
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