Importance of thermo-osmosis for fluid flow and transport in clay formations hosting a nuclear waste repository

Gonçalvès, Julio; Marsily, Ghislain de; Trémosa, Joachim

doi:10.1016/j.epsl.2012.03.032

Cited by 38 publications

(40 citation statements)

References 32 publications

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“…This is shown in Figure 8.9 reproduced from Gonçalvès et al (2012) (see this reference for more details). The pore size is calculated with Eqn (8.21).…”

Section: When Off-diagonal Terms Are Not Negligible: Formalism and Exmentioning

confidence: 92%

“…Although for clay materials, a case of flow directed from the cold zone toward a warmer zone was described by Dirksen (1969), most experiments show a flow toward the lower temperature zones ð3 T > 0Þ: In a recent study Gonçalvès et al (2012), the available data for k T ¼ 3 T k were collected, and an interesting relation between 3 T (Pa K À1 ) and the half-pore size b was identified. This is shown in Figure 8.9 reproduced from Gonçalvès et al (2012) (see this reference for more details).…”

Section: When Off-diagonal Terms Are Not Negligible: Formalism and Exmentioning

confidence: 98%

“…The maximum concentration was used since osmotic efficiency decreases with salinity, the lower value controls the measured osmotic flux. Half-pore sizes were calculated using reference SSA and effective porosity (see references in Gonçalvès et al, 2012) except for C1 and Arco shales where the experimental pore size was used directly. Porosities of 0.37, 0.12, 0.29, and 0.2 for Bulldog, North sea, Pierre II, Muderong shales, respectively, were assumed based on the references and the SSA listed in Bunger et al (2014). where A S is the specific surface area (SSA, m 2 kg À1 ), r S is the density of the solid (kg m À3 ).…”

Section: When Off-diagonal Terms Are Not Negligible: Formalism and Exmentioning

confidence: 99%

See 2 more Smart Citations

Semipermeable Membrane Properties and Chemomechanical Coupling in Clay Barriers

Gonçalvès¹,

Adler²,

Cosenza³

et al. 2015

Natural and Engineered Clay Barriers

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“…This is shown in Figure 8.9 reproduced from Gonçalvès et al (2012) (see this reference for more details). The pore size is calculated with Eqn (8.21).…”

Section: When Off-diagonal Terms Are Not Negligible: Formalism and Exmentioning

confidence: 92%

Section: When Off-diagonal Terms Are Not Negligible: Formalism and Exmentioning

confidence: 98%

Section: When Off-diagonal Terms Are Not Negligible: Formalism and Exmentioning

confidence: 99%

See 1 more Smart Citation

Semipermeable Membrane Properties and Chemomechanical Coupling in Clay Barriers

Gonçalvès¹,

Adler²,

Cosenza³

et al. 2015

Natural and Engineered Clay Barriers

Self Cite

View full text Add to dashboard Cite

“…As previously mentioned, values of the ratio of thermo-osmotic conductivity and intrinsic 412 permeability against the total ionic content used in this paper are adopted from the data 413 presented by Gonçalvès and Trémosa (2010) and Gonçalvès et al (2012). This approach 414 adopted provides relationships between the thermo-osmotic conductivity and clay surface-415 charge, bulk fluid concentration, type of counter ion in the pore water and pore size.…”

Section: The Effects Of Thermo-osmosis 401mentioning

confidence: 99%

“…The simulation is 346 carried out using three values of thermo-osmotic conductivity based on the range of ( ⁄ ) 347 provided by Gonçalvès et al (2012) given as ⁄ = 10, ⁄ = 100 and ⁄ = 1000. Mitchell (1993) where an empirical relation between liquid limit and 360 specific surface is given, a liquid limit is obtained through which an approximate value of 361 coefficient of consolidation is assumed.…”

Section: Days 345mentioning

confidence: 99%

Effects of Thermo-Osmosis on Hydraulic Behavior of Saturated Clays

2017

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17Despite a body of research carried out on thermally coupled processes in soils, understanding 18 of thermo-osmosis phenomena in clays and its effects on hydro-mechanical behaviour is 19 incomplete. This paper presents an investigation on the effects of thermo-osmosis on 20 hydraulic behaviour of saturated clays. A theoretical formulation for hydraulic behaviour is 21 developed incorporating an explicit description of thermo-osmosis effects on coupled hydro-22 mechanical behaviour. The extended formulation is implemented within a coupled numerical 23 model for thermal, hydraulic, chemical and mechanical behaviour of soils. The model is 24 tested and applied to simulate a soil heating experiment. It is shown that the inclusion of 25 thermo-osmosis in the coupled thermo-hydraulic simulation of the case study provides a 26 2 better agreement with the experimental data compared with the case where only thermal 27 expansion of the soil constituents was considered. A series of numerical simulations are also 28 presented studying the pore water pressure development in saturated clay induced by a 29 heating source. It is shown that pore water pressure evolution can be considerably affected by 30 thermo-osmosis. Under the conditions of the problem considered, it was found that thermo-31 osmosis changed the pore water pressure regime in the vicinity of the heater in the case where 32 value of thermo-osmotic conductivity was larger than 10 -12 m 2 .K -1 .s -1 . New insights into the 33 hydraulic response of the ground and the pore pressure evolution due to thermo-osmosis are 34 provided in this paper.

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Analytical Expressions for Thermo‐Osmotic Permeability of Clays

Gonçalvès

Matray

et al. 2018

Geophysical Research Letters

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In this study, a new formulation for the thermo‐osmotic permeability of natural pore solutions containing monovalent and divalent cations is proposed. The mathematical formulation proposed here is based on the theoretical framework supporting thermo‐osmosis which relies on water structure alteration in the pore space of surface‐charged materials caused by solid‐fluid electrochemical interactions. The ionic content balancing the surface charge of clay minerals causes a disruption in the hydrogen bond network when more structured water is present at the clay surface. Analytical expressions based on our heuristic model are proposed and compared to the available data for NaCl solutions. It is shown that the introduction of divalent cations reduces the thermo‐osmotic permeability by one third compared to the monovalent case. The analytical expressions provided here can be used to advantage for safety calculations in deep underground nuclear waste repositories.

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Importance of thermo-osmosis for fluid flow and transport in clay formations hosting a nuclear waste repository

Cited by 38 publications

References 32 publications

Semipermeable Membrane Properties and Chemomechanical Coupling in Clay Barriers

Semipermeable Membrane Properties and Chemomechanical Coupling in Clay Barriers

Effects of Thermo-Osmosis on Hydraulic Behavior of Saturated Clays

Analytical Expressions for Thermo‐Osmotic Permeability of Clays

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