Calculation of lid-driven cavity flow using GAO-YONG turbulence equations
-
摘要: 运用SIMPLER方法、QUICK格式及交错网格技术求解GAO-YONG湍流方程组,对二维顶盖驱动方腔流进行数值模拟,得到方腔内的涡量分布和方腔中心水平剖线上的速度变化曲线,并与DNS(Directly Numerical Simulation)结果进行定性对比,有较好的一致性.结果表明,GAO-YONG湍流方程组中与湍流多尺度现象相对应的机械能方程对此湍流方程组能够合理地模拟出顶盖驱动方腔流中复杂的湍流粘性分布以及湍流能量逆转现象起到了关键作用.研究进一步证明了GAO-YONG湍流方程组能够得到复杂流动的真实粘性场.
-
关键词:
- 数值模拟 /
- 湍流 /
- GAO-YONG湍流方程组 /
- 顶盖驱动方腔流
Abstract: A two-dimensional stationary incompressible lid-driven cavity flow was numerically simulated employing staggered grid arrangement, incompressible SIMPLER method and QUICK scheme to solve GAO-YONG turbulence equations. The vorticity contour in the cavity and the velocity changing curve of cavity's central horizontal section line were acquired and compared with directly numerical simulation(DNS) result qualitatively and the consistency was very good. It shows that the mechanical energy equation corresponding to the scales of nonlinearity in the turbulence equations is very important for the turbulence equations to reasonably simulate the complex distribution of eddy viscosity coefficients and the inversion phenomenon of turbulence energy in the lid-driven cavity flow. Farther the GAO-YONG turbulence equations being able to gain real viscosity field in complex flow was proved. -
[1] Su W D, Zhao H, Wu J Z. A diagnosis of linear eddy-viscosity in turbulence modeling[J]. Physics of Fluids,2002,14(3):1284~1287 [2] Gao Ge, Yong Yan. Partial-average-based equations of incompressible turbulent flow[J]. International Journal of Non-Linear Mechanics,2004,39:1407~1419 [3] 陈广业. 使用Gao-Yong方程组对不可压转捩/湍流平板边界层的计算[J].航空动力学报,2003,18(1):2~7 Chen Guangye.The calculation of incompressible wall boundary layer using GAO-YONG turbulence equations[J].Journal of Aerospace Power, 2003,18(1):2~7(in Chinese) [4] 高 歌, 熊 焰. 不可压湍流平均流与拟序流的各向异性模式理论及其数值验证[J].航空动力学报,2000,15(1):1~12 Gao Ge, Yong Yan. The united modeling theory for both of mean flow and coherent flow of incompressible turbulence[J].Journal of Aerospace Power,2000,15(1):1~12(in Chinese) [5] 陶文铨. 计算传热学的近代进展[M].北京:科学出版社,2000 Tao Wenquan. Advances in numerical heat transfer[M].Beijing:Science Press,2000(in Chinese) -
点击查看大图
计量
- 文章访问数: 2867
- HTML全文浏览量: 160
- PDF下载量: 1136
- 被引次数: 0
下载:
