坡面颗粒流开源软件TITAN2D的改进及应用

CSpace

	坡面颗粒流开源软件TITAN2D的改进及应用
其他题名	Improvement and Application of Open-source Code TITAN2D for Numerical Simulation of Dry Granular Avalanche Flows over Natural Terrain
	袁礼; 刘伟; 翟健
	2016
发表期刊	山地学报
ISSN	1008-2786
卷号	000 期号:003 页码:346-355
摘要	滑坡或崩塌碎屑流的泛滥范围和冲击力可以用颗粒薄层流模型进行数值模拟研究。薄层流模型是将流体力学的质量守恒和动量守恒方程在深度方向平均后所得的近似方程组,因其在分析上的简化而广受重视。近年来基于颗粒薄层流模型(以Savage-Hutter模型为代表)的模拟研究取得大量进展,但相应的能够模拟自然地形上碎屑流的开源软件尚不多见。2007年美国纽约州立布法罗大学公开了一款结合颗粒薄层流模型和地理信息系统(GIS)的开源软件TITAN2D。在此,将TITAN2D中原来的HLL通量修改为耗散更小的HLLC通量,并增加了颗粒材料的停止准则。通过简单的颗粒堆积物和溃坝问题,验证了软件改进的有效性。进一步,利用中科院科学数据服务平台的DEM数据对重庆武隆鸡尾山滑坡、舟曲泥石流用干颗粒流进行数值模拟。通过调节底面摩擦角可以使计算结果大概反映实际灾害的泛滥范围,表明该软件值得进一步改进与发展。
其他摘要	The inundating zones and impacting forces of incurred by landslide - and avalanche-debris flows can be studied numerically by using shallow granular flow models. A shallow flow model is a set of approximate equations derived from depth average of the mass and momentum balance equations of fluid mechanics, and has attracted widespread attention due to its simplicity in analysis. Although a lot of simulation studies based on shallow granular flow models （typically the Savage -Hutter model） have been conducted in the past, few open source codes are a- vailable for modeling granular avalanche flows over natural terrains. In 2007 an open source code named TITAN2D was issued by the University at Buffalo. It features a combination of the shallow granular flow model with the geo- graphic information system （GIS）. In this paper, the numerical flux scheme used in the original TITAN2D is modi- fied from HLL to HLLC scheme, and the stopping criteria for granular materials are added to TITAN2D. The effec- tiveness of the improved code is verified in simple granular pile and dam break problems. Furthermore, by utilizing the open digital elevation model （DEM） database at CAS - CSDB web site, Wulong Jiweishan landslide and Zhou- qu debris flow were simulated as dry granular avalanches. Numerical results obtained by tuning the bed friction an- gle can partially reflect the inundating zones of the real disasters but reveal differences, indicating that TITAN2D is worthy of development and needs further improvement.
关键词	颗粒崩塌流 Savage-Hutter模型停止准则开源软件 TITAN2D
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:5738122
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/54122
专题	中国科学院数学与系统科学研究院
作者单位	中国科学院数学与系统科学研究院
推荐引用方式 GB/T 7714	袁礼,刘伟,翟健. 坡面颗粒流开源软件TITAN2D的改进及应用[J]. 山地学报,2016,000(003):346-355.
APA	袁礼,刘伟,&翟健.(2016).坡面颗粒流开源软件TITAN2D的改进及应用.山地学报,000(003),346-355.
MLA	袁礼,et al."坡面颗粒流开源软件TITAN2D的改进及应用".山地学报 000.003(2016):346-355.