避免人工干预的流体力学Riemann解法器

A Robust Riemann Solver Without Artificial Intervention

为克服体平均多流管格式（MFCAV）实施中存在人工干预的不足,基于移动网格设计适用于若干实际流场计算的HLLCM格式,该格式可以较好地抑制网格非物理变形,可避免人为调整网格.简化模型算例表明,HLLCM格式保持球对称性,计算结果优于MFCAV格式;应用模型算例表明,在复杂流场、实用状态方程、无人为干预措施的情形,与MFCAV格式相比,HLLCM格式可有效模拟的物理过程时间大幅延长,流场网格品质与能量守恒误差均有较大的改善.

In order to improve robustness of multi-fluid-channel scheme on average of volume（MFCAV） and overcome its artificial intervention in actual application,a new HLLCM scheme was designed on a moving mesh,which restrains non-physical mesh tangling without artificial intervention.Numerical results show that the HLLCM scheme maintains one-dimensional spherical symmetry on equalangle-zoned grids which has better numerical effects in keeping mesh quality and energy conservation in complex applications than MFCAV scheme.