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A Lagrangian finite element method for 3D compressible flow applications

机译:用于3D可压缩流应用的拉格朗日有限元方法

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摘要

We discuss a Lagrangian approach for the simulation of 3D compressible flows on non-structured tetrahedral meshes. The formulation is nodal-based, in the sense that kinematic and thermodynamic variables are all interpolated with continuous P1 polynomials. The equations are solved with an explicit time-marching scheme without stabilizing terms and with the inclusion only of a shock-capturing viscosity. Several examples featuring shock propagations and mixing of fluids are addressed, with particular emphasis on the stability of the approach and on possible strategies for mesh update. (C) 2016 Elsevier B.V. All rights reserved.
机译:我们讨论了Lagrangian方法,用于在非结构化四面体网格上模拟3D可压缩流。在运动学和热力学变量都用连续的P1多项式进行插值的意义上,该公式基于节点。用明确的时间步调方案求解方程式,而无需稳定项,并且仅包含捕捉震荡的粘性。提出了几个以冲击传播和流体混合为特征的示例,特别强调了方法的稳定性和网格更新的可能策略。 (C)2016 Elsevier B.V.保留所有权利。

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