A high-order adaptive algorithm for multispecies gaseous flows on mapped domains
A high-order adaptive algorithm for multispecies gaseous flows on mapped domains
复制标题
映射域上多物种气流的高阶自适应算法
DOI：
10.1016/j.compfluid.2018.05.010
复制
发表时间：
2018
影响因子：
2.8
通讯作者：
Xinfeng Gao
中科院分区：
文献类型：
--
作者：
Landon D. Owen;S. Guzik;Xinfeng Gao
开发并验证了四阶精确有限体积方法，用于求解在空间和时间上自适应细化的映射网格上的强非线性、时间相关、可压缩、热完美和多物种气流。该算法引入了一种新的数值通量计算方案，以应对气体混合物的非线性、空间和时间变化的热力学和输运特性。利用Couette流、物质质量扩散气泡以及涡流对流和扩散问题验证了四阶数值误差收敛性和求解精度。使用一维激波管和二维激波箱问题验证了热完美的多物种功能。获得了马赫反射问题的结果，其中强激波在多物质气流中沿着斜坡传播，并与单一物质、热量完美的气流在相同斜坡上传播的激波传播的解进行了比较。然后应用经过验证的算法来模拟相对复杂的流动配置，以检查由于双空气喷嘴以及预混合燃料混合物流入的主入口而产生的二次流混合。未来的研究将集中在三维配置上。
A fourth-order accurate finite-volume method is developed and verified for solving strongly nonlinear, time-dependent, compressible, thermally perfect, and multispecies gaseous flows on mapped grids that are adaptively refined in space and time. The algorithm introduces a new scheme for numerical flux calculations in order to cope with the nonlinear, spatially and temporally varying thermodynamic and transport properties of the gaseous mixture. The fourth-order numerical error convergence and solution accuracy are verified using Couette flow, species mass diffusion bubble, and vortex convection and diffusion problem. The thermally perfect, multispecies functionality is validated using a one-dimensional shock tube and two-dimensional shock box problem. Results are obtained for the Mach reflection problem where a strong shock propagates in the multispecies gaseous flow along a ramp and are compared to the solution of the shock propagation in a single species, calorically perfect, gaseous flow over the same ramp. The validated algorithm is then applied to simulate a relatively complex flow configuration to examine the secondary flow mixing due to the double air jets along with the main inlet where a premixed fuel mixture flows in. Future investigations will focus on three-dimensional configurations.