DOI: 10.1002/grl.50319
论文题名: Dynamic effective properties of heterogeneous geological formations with spherical inclusions under periodic time variations
作者: Rabinovich A. ; Dagan G. ; Miloh T.
刊名: Geophysical Research Letters
ISSN: 0094-9179
EISSN: 1944-8910
出版年: 2013
卷: 40, 期: 7 起始页码: 1345
结束页码: 1350
语种: 英语
英文关键词: effective properties
; groundwater flow
Scopus关键词: American Geophysical Union
; Dilute concentrations
; Dimensionless frequency
; Dynamic effective properties
; Effective property
; Geological formation
; Periodic time variations
; Unsteady groundwater flows
; Groundwater
; Groundwater flow
; Periodic structures
; concentration (composition)
; dynamic property
; electrical conductivity
; groundwater flow
; heterogeneity
; hydrogeology
; periodicity
; temporal variation
; unsteady flow
英文摘要: In unsteady groundwater flow (or similar processes of heat/electrical conduction), the heterogeneous medium structure is characterized by two random properties, the conductivity K and the specific storativity S. The average head field H ©and the associated effective properties Kef, S ef are determined for a layer with a periodic head drop between boundaries, such that H is periodic in time, and a medium made up of a matrix with a dilute concentration of spherical inclusions. In the common quasi-steady approximation, Kef is equal to the classical steady solution while Sef = SA, the arithmetic mean. We derive expressions for the frequency dependent Kef, Sef, which are generally complex, i.e., dynamic. The main result is the delineation of the ranges of the parameters: dimensionless frequency (ω) and contrasts of conductivity (κ) and storativity (s) between the matrix and the inclusions, for which dynamic effects are significant. Key Points Average flux, head and the associated effective properties are determined. Delineation of ranges of parameter values where dynamic effects are significant. In a large range of media properties, effective properties are approximately real. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876910585&doi=10.1002%2fgrl.50319&partnerID=40&md5=e1bbbc9234b79662f931e33dbaed2980
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6443
Appears in Collections: 气候减缓与适应
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作者单位: School of Mechanical Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
Recommended Citation:
Rabinovich A.,Dagan G.,Miloh T.. Dynamic effective properties of heterogeneous geological formations with spherical inclusions under periodic time variations[J]. Geophysical Research Letters,2013-01-01,40(7).