Effects of multiscale heterogeneity on transport in three-dimensional fractured porous rock with a rough-walled fracture network

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Effects of multiscale heterogeneity on transport in three-dimensional fractured porous rock with a rough-walled fracture network

Zhan, Liangtong (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

Hu, Yingtao (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

Zou, Liangchao, 1987- (författare): KTH,Vatten- och miljöteknik

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Xu, Wenjie (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

Ye, Zuyang (författare): Wuhan Univ Sci & Technol, Sch Resource & Environm Engn, Wuhan 430081, Peoples R China.

Chen, Ruiqi (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

Zhuang, Duanyang (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

Li, Jinlong (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

Chen, Yunmin (författare): Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China.

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Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Peoples R China;Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Peoples R China. Vatten- och miljöteknik (creator_code:org_t)

Elsevier BV, 2022
2022
Engelska.
Ingår i: Computers and geotechnics. - : Elsevier BV. - 0266-352X .- 1873-7633. ; 148, s. 104836-

Relaterad länk:: https://urn.kb.se/re...; visa fler...; https://doi.org/10.1...; visa färre...

Tidskriftsartikel (refereegranskat)

Abstract Ämnesord

Stäng

This study numerically analyzed the effect of multiscale heterogeneity on flow and transport response of a threedimensional (3D) fractured porous rock with rough-walled fracture network. 3D discrete fracture matrix (DFM) models with different heterogeneity scales (network-scale, fracture-to-fracture-scale, and individual fracture scale) were generated. The results showed that the velocity and concentration distributions among the different DFMs were highly variable due to multiscale heterogeneity. The cumulative distribution function curves (CDFs) of the concentration disctribution indicated that fracture-to-fracture-scale heterogeneity led to an earlier breakthrough time than network-scale heterogeneity, and this behavior was further enhanced by individual fracture-scale heterogeneity, suggesting that transport was accelerated by enhanced local channeling flow with increasing fracture roughness. The complementary cumulative distribution function curves (CCDFs) showed obvious long tailing as heterogeneity increased from fracture-to-fracture-scale to individual fracture-scale. Compared with the case where only network-scale heterogeneity was considered, the calculated downstream concentration with fracture-to-fracture-scale heterogeneity increased first from 0.670 to 0.709. However, the downstream concentration then decreased from 0.684 to 0.618 as the roughness increased from & USigma; = 0.03 mm to & USigma; = 0.07 mm. These results can help predict the migration behavior of radioactive nuclides in far-field areas and assess the long-term performance of deep geological repositories.

Ämnesord

NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
NATURVETENSKAP -- Data- och informationsvetenskap -- Annan data- och informationsvetenskap (hsv//swe)
NATURAL SCIENCES -- Computer and Information Sciences -- Other Computer and Information Science (hsv//eng)

Nyckelord

Solute transport
Multiscale heterogeneity
Fractured porous rock
Discrete fracture matrix model
Fracture roughness
Earlier breakthrough time

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Av författaren/redakt...: Zhan, Liangtong; Hu, Yingtao; Zou, Liangchao, ...; Xu, Wenjie; Ye, Zuyang; Chen, Ruiqi; visa fler...; Zhuang, Duanyang; Li, Jinlong; Chen, Yunmin; visa färre...

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NATURVETENSKAP: NATURVETENSKAP; och Geovetenskap och ...; och Geofysik

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