Towards Bayesian Quantification of Permeability in Micro-scale Porous Structures – The Database of Micro Networks

Fazelabdolabadi, Babak; Golestan, Mohammad Hossein

doi:10.28991/hij-2020-01-04-02

Cited by 78 publications

(21 citation statements)

References 47 publications

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“…Although the rock mass is actually discontinuous medium, Fazelabdolabadi et al [23] develops a Bayesian framework to quantify the absolute permeability of water in a porous structure from the geometry and clustering parameters of its underlying pore-throat network. Herein, A circular tunnel with a radius a is excavated in a homogeneous infinite isotropic rock mass subjected to a hydrostatic stress (p 0 ), the influence of porosity and permeability is not considered.…”

Section: Problem Descriptionmentioning

confidence: 99%

Elastic-viscoplastic solution of a circular tunnel in Hoek-Brown rock mass

Wang

Jiang

Lin

et al. 2021

Lat. Am. j. solids struct.

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A closed-form analytical solution to rheological phenomena is obtained based on Hoek-Brown (HB) yield criterion and the generalized Bingham model. Once the circular tunnel is excavated, an initial plastic region is formed. When the total stresses fulfil the yield condition, the initial plastic region steps into the viscoplastic region, in which the displacement develops with time. The one-dimensional constitutive equation of the generalized Bingham model is transformed into a three-dimensional expression in polar coordinates by combining the plane strain condition. With the help of equilibrium differential equation, geometric equation and boundary condition, the stress and displacement in the initial plastic region can be expressed. At the moment of t, the stresses and displacements are described similar to the solutions of the elasto-plastic state. The stresses, strains and displacements after transformation can be expressed in the viscoplastic region. The proposed solution was verified by the closed-form solution of circular tunnels in elastic-brittle-plastic rock mass.

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Section: Problem Descriptionmentioning

confidence: 99%

Elastic-viscoplastic solution of a circular tunnel in Hoek-Brown rock mass

Wang

Jiang

Lin

et al. 2021

Lat. Am. j. solids struct.

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“…Cavitation is one of the destructive phenomena that happen because of such negative pressure. Aeration by aerator tube is usually employed in order to control this phenomenon [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Performance and Cavitation Analysis in Bottom Outlets of Dam Using CFD Modelling

Yamini

Mousavi

Kavianpour

et al. 2021

Advances in Civil Engineering

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Bottom outlets are significant structures of dams, which are responsible for controlling the flow rate, operation, or removal of reservoir sedimentation. The service gate controls the outlet flow rate, and whenever this gate is out of order, the emergency gate which is located at upstream is utilized. The cavitation phenomenon is one of the common bottom outlets’ problems due to the rapid flow transfer. The present research is a numerical study of the flow pattern in a dam’s bottom outlet for different gate openings by the use of Flow-3D software and RNG k-ε turbulence model. The investigation is carried out on the Sardab Dam, an earth dam in Isfahan (Iran). The maximum velocity for 100% opening of the gate and Howell Bunger valve is about 18 m/s in the section below the gate, and the maximum velocity for 40% opening of the gate is equal to 23.1 m/s. For 50% opening of the service and emergency gate in the valve’s upstream areas, the desired pressure values are reduced. Moreover, in the areas between the two emergency and service gates, the pressure values are reduced. The possibility of cavitation in this area can be reduced by installing aerators. The flow pattern in Sardab Dam’s bottom outlet has relatively stable and proper conditions, and there are no troublesome hydraulic phenomena such as local vortices, undesirable variations in pressure, and velocity in the tunnel, and there is no flow separation in the critical area of flow entering into the branch.

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“…The quality of water is usually used to describe the condition of water, including its chemical, physical, and biological features, regarding its suitability for a particular purpose (i.e. drinking, fishing, or irrigation) (Al-Tameemi et al, 2020;Fazelabdolabadi & Golestan, 2020;Sargaonkar & Deshpande, 2003).…”

Section: Introductionmentioning

confidence: 99%