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| 旋转扰动流体中壁面湍流不稳定及其拟序结构研究Ⅱ：数值模式 | |
| 引用本文： | Enrico Ferrero,张瑛,全利红,Luca Mortarini,Renato Forza.旋转扰动流体中壁面湍流不稳定及其拟序结构研究Ⅱ：数值模式[J].气象与减灾研究,2009,32(4):14-17. |
| 作者姓名： | Enrico Ferrero 张瑛 全利红 Luca Mortarini Renato Forza |
| 作者单位： | 1. Department of General Physics,University of Turin,Turin Italy 10125 2. University of Piemonte Orientale,Alessandria Italy 15100 3. Department of General Physics,University of Turin,Turin Italy 10125;江西省气象局,江西,南昌,330046 4. University of Piemonte Orientale,Alessandria Italy 15100;中国科学院大气物理研究所,北京,100029 5. ISAC-CNR,Turin Italy 10133 |
| 基金项目： | 意大利皮埃蒙特大区2004年度科技应用研究项目 |
| 摘 要： | 对第一部分的实验结果进行了讨论,指出局地最大、最小涡度的存在与所谓的正压不稳定和大气中经常观测到的滚动涡有关。速度廓线中的拐点和涡度极大值点对应不稳定发展的位置。另外,为了改进湍流的模拟,根据“准正则”近似,发展了一个三阶闭合模式。这个模型已被证明可以描述与湍流过程有关的流体动力学变量的趋势。 |
| 关 键 词： | 实验结果 滚动涡 数值模式 “准正则”近似 高阶闭合 |
WALL TURBULENCE INSTABILITIES AND COHERENT STRUCTURES IN THE ROTATING TURBULENT FLOWS PART Ⅱ:NUMERICAL MODEL |
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| Arnaldo Longhetto,Enrico Ferrero,Zhang Ying,Quan Lihong,Massimiliano Manfrin,Luca Mortarin,Renato Forza.WALL TURBULENCE INSTABILITIES AND COHERENT STRUCTURES IN THE ROTATING TURBULENT FLOWS PART Ⅱ:NUMERICAL MODEL[J].Meteorology and Disaster Reduction Research,2009,32(4):14-17. | |
| Authors: | Arnaldo Longhetto Enrico Ferrero Zhang Ying Quan Lihong Massimiliano Manfrin Luca Mortarin Renato Forza |
| Institution: | Arnaldo Longhetto , Enrico Ferrero , Zhang Ying ,Quan Lihong, Massimiliano Manfrin , Luca Mortarini , Renato Forza (1. Department of General Physics, University of Turin, Turin 10125, Italy; 2. University of Piemonte Orientale, Alessandria 15100, Italy; 3. Jiangxi Provincial Meteorological Bureau, Nanchang 330046, China; 4. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 5. ISAC-CNR, Turin 10133, Italy) |
| Abstract: | The result of the experiment presented in Part I is discussed. The results show that the presence of local vorticity maxima and minima can be related to the so called barotropic instability and roll vortexes which are often observed in the atmosphere. The inflection point in the velocity profile and the vorticity maximum correspond to points where instability develops. In addition, in order to improve the present simulation models of the turbulence, we have developed a third order closure model, with the assumption of ＂quasi-normal＂. The model has been designed so as to become a useful and reliable tool for describing the trend of fluid-dynamic variables connected with turbulent processes. |
| Keywords: | Experiment results Roll vortexes Numerical model ＂Quasi-normal＂ High order closure |
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