Residual-based variational multi-scale modeling for particle-laden gravity currents over flat and triangular wavy terrains
Residual-based variational multi-scale modeling for particle-laden gravity currents over flat and triangular wavy terrains
复制标题
平坦和三角形波浪地形上的粒子负载重力流的基于残差的变分多尺度建模
DOI：
10.1016/j.compfluid.2019.05.008
复制
发表时间：
2019
影响因子：
2.8
通讯作者：
Jinhui Yan
中科院分区：
文献类型：
--
作者：
Songzhe Xu;N. Liu;Jinhui Yan
本文采用基于残差的变分多尺度方法（RBVMS），建立了一个模拟大雷诺数（Re）下稀颗粒重力流的数值计算公式，该方法考虑了速度细尺度和密度浓度方程残差之间的耦合。建议的配方是用来模拟锁交换粒子负载的重力流在Re = 10，000。首先，我们通过模拟平坦地形上的重力流来验证所提出的公式。流量统计数据与DNS等高分辨率模拟结果或文献中的实验结果进行了彻底比较。结果表明，本文提出的RBVMS公式可以在较低的网格分辨率下再现相当精确的结果。在此基础上，模拟了三角形起伏地形上随波高变化的重力流。研究了波高对流量统计的影响。
In this paper, a numerical formulation for simulating dilute particle-laden gravity currents at large Reynolds number (Re) is developed using a residual-based variational multi-scale formulation (RBVMS), in which the coupling between the velocity fine scales and density concentration equation residual is represented. The proposed formulation is utilized to simulate the lock-exchange particle-laden gravity currents at R e= 10, 000. Firstly, we validated the proposed formulation by simulating the gravity currents over flat terrain. Flow statistics are thoroughly compared against high-resolution simulation results such as DNS or experimental results in the literature. It shows the RBVMS formulation presented here can reproduce quite accurate results with much lower mesh resolution. Then, the particle-laden gravity currents over triangular wavy terrains with changing wave heights are simulated. The effect of the wave height on the flow statistics is investigated.
影响因子：
3.2
作者：
H. Hiester;M. Piggott;P. Allison
通讯作者：
H. Hiester;M. Piggott;P. Allison
DOI：
10.1016/j.cma.2014.10.040
发表时间：
2015-02-01
影响因子：
7.2
作者：
Kamensky D;Hsu MC;Schillinger D;Evans JA;Aggarwal A;Bazilevs Y;Sacks MS;Hughes TJ
通讯作者：
Hughes TJ