一种结合的光滑粒子水力学-有限体积方法,用于一维的冲击捕获
Conner Myers1, Camille Palmer1, Todd Palmer1
1School of Nuclear Science and Engineering, Oregon State University, 1791 SW Campus Way, Corvallis, 97331, OR, United States.
Heliyon
|July 24, 2023
概括
一种新的混合方法结合了有限体积 (FVM) 和光滑粒子水力学 (SPH) 来解决冲击问题. 这种结合的方法提高了流体动力学模拟的准确性和效率.
科学领域:
- 计算流体动力学 计算流体动力学
- 对冲击波的数值方法
背景情况:
- 像有限体积 (FVM) 和光滑粒子水力学 (SPH) 这样的传统方法在准确捕捉冲击不连续性方面存在局限性.
- 建模强冲击问题需要强大的数值技术,以平衡精度和计算成本.
研究的目的:
- 为一维冲击问题引入和评估一种合FVM (Pyro2) 和SPH (PySPH) 的新型混合方法.
- 与单个FVM和SPH模拟相比,评估结合FVM-SPH方法的准确性和计算效率.
- 探索这种混合方法在更高维度的更复杂模拟中的潜力.
主要方法:
- 将有限体积方法代码Pyro2与光滑粒子水力学代码PySPH结合起来.
- 使用有限体积网格用于系统的大部分和SPH粒子用于具有不连续流体值 (冲击) 的区域.
- 通过边界细胞和幽灵粒子实现合,在每个时间阶段进行物业交换的线性插值.
主要成果:
- 混合FVM-SPH方法在一维强冲击问题中证明了保存的精度和计算效率.
- 与独立的Pyro2 (FVM) 和PySPH (SPH) 模拟进行比较,验证了混合方法的性能.
- 该研究证实了FVM和SPH域之间流体属性交换的线性插值的有效性.
结论:
- 结合的FVM-SPH方法为准确有效地模拟冲击现象提供了一个有前途的策略.
- 这种混合方法为将SPH功能 (如复杂几何和流体结构相互作用建模) 整合到FVM框架提供了一条途径.
- 初步的单维结果表明,使用结合的FVM-SPH方法,在二维和三维的更大规模爆炸模拟中显著提高了效率.
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