A random walk simulation of scalar mixing in flows through submerged vegeta-tions

来源 :水动力学研究与进展B辑 | 被引量 : 0次 | 上传用户:ttcj_008
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The scalar transport phenomena in vertical two-dimensional flows are studied using the random walk method. The establi-shed Lagrangian model is first applied to study the idealized longitudinal dispersion in open channels, before being used to investi-gate the scalar mixing characteristics of the flows through submerged vegetations. The longitudinal dispersion coefficients of the fully-developed boundary layer flows, with and without vegetations, are calculated based on the positions of the particles. A conve-nient way of incorporating the effects of vegetations is proposed, where all the flow parameters are regarded to be continually distri-buted over the depth. The simulation results show high accuracy of the developed random walk method, and indicate that the new method of accounting for the vegetation effects is appropriate for all the test cases considered. The predicted longitudinal dispersion coefficients agree well with the measurements. The merit of the new method is highlighted by its simplicity and efficiency in com-parison with the conventional method that assumes the discontinuous distribution of the flow parameters over the depth.
其他文献
Background:As a time-dependent antibiotic,the time of cefazedone concentration exceeds the minimum inhibitory concentration (MIC) is the key pharmacokinetic-pha
This paper is conced with the mutual effects of viscous dissipation and slip effects on a rotating vertical cone in a viscous fluid. Similarity solutions for ro
This paper presents the development of an urban river water quality model which considers the physical-biochemical processes within rivers and the incorporated
In this paper, with consideration of the nonlinear and non-stationary properties of the temperature time series, we employ the Hilbert-Huang Transform, based on
In this paper, a fluid structure interaction(FSI) model is used to study the internal flow field and the measurement performance of a multi-channel flow meter.
目的 比较喉罩-舒芬太尼联合丙泊酚与喉罩-氯胺酮联合丙泊酚静脉麻醉两种方法在体表整形手术中应用的优缺点.方法 40例择期行体表整形手术患者,随机分为喉罩-舒芬太尼联合丙
期刊
国内外对飞机地面载荷的研究主要是针对每个起落架的总载荷,鲜见对起落架各机轮载荷分配研究的文献,而工程上又迫切需要相关的针对飞机起落架机轮载荷分配的计算分析方法.在