Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072864 |
Reconciling the Reynolds number dependence of scalar roughness length and laminar resistance | |
Li, Dan1; Rigden, Angela1; Salvucci, Guido1; Liu, Heping2 | |
2017-04-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The scalar roughness length and laminar resistance are necessary for computing scalar fluxes in numerical simulations and experimental studies. Their dependence on flow properties such as the Reynolds number remains controversial. In particular, two important power laws (1/4 and 1/2), both having strong theoretical foundations, have been widely used in various parameterizations and models. Building on a previously proposed phenomenological model for interactions between the viscous sublayer and the turbulent flow, it is shown here that the two scaling laws can be reconciled. The 1/4 power law corresponds to the situation where the vertical diffusion is balanced by the temporal change or advection due to a constant velocity in the viscous sublayer, while the 1/2 scaling corresponds to the situation where the vertical diffusion is balanced by the advection due to a linear velocity profile in the viscous sublayer. In addition, the recently proposed 1 power law scaling is also recovered, which corresponds to the situation where molecular diffusion dominates the scalar budget in the viscous sublayer. The formulation proposed here provides a unified framework for understanding the onset of these different scaling laws and offers a new perspective on how to evaluate them experimentally. |
英文关键词 | scalar roughness length laminar resistance Reynolds number scaling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400186500026 |
WOS关键词 | BOUNDARY-LAYER RESISTANCE ; TEMPERATURE DISTRIBUTION ; FLAPPING LEAVES ; PRANDTL NUMBER ; HEAT-TRANSFER ; EVAPORATION ; SURFACES ; VAPOR ; MODEL ; STILL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26917 |
专题 | 气候变化 |
作者单位 | 1.Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA; 2.Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA |
推荐引用方式 GB/T 7714 | Li, Dan,Rigden, Angela,Salvucci, Guido,et al. Reconciling the Reynolds number dependence of scalar roughness length and laminar resistance[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(7). |
APA | Li, Dan,Rigden, Angela,Salvucci, Guido,&Liu, Heping.(2017).Reconciling the Reynolds number dependence of scalar roughness length and laminar resistance.GEOPHYSICAL RESEARCH LETTERS,44(7). |
MLA | Li, Dan,et al."Reconciling the Reynolds number dependence of scalar roughness length and laminar resistance".GEOPHYSICAL RESEARCH LETTERS 44.7(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论