Blar i NTNU Open på forfatter "Sinha, Santanu"
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A Monte Carlo Algorithm for Immiscible Two-Phase Flow in Porous Media
Savani, Isha; Sinha, Santanu; Hansen, Alex; Bedeaux, Dick; Kjelstrup, Signe; Vassvik, Morten (Journal article; Peer reviewed, 2017)We present a Markov Chain Monte Carlo algorithm based on the Metropolis algorithm for simulation of the flow of two immiscible fluids in a porous medium under macroscopic steady-state conditions using a dynamical pore ... -
Corner Load Sharing in the Fiber Bundle Model
Lundheim, Elias (Master thesis, 2023)Å forstå bruddmekanikk kan føre til sterkere matrial og tryggere bygninger. Bruddmekanikk er årsaken til at vinduer på fly er avrundet, og hvorfor taco-krydder-poser har små hakk på kanten. Fiber Bunt Modellen er en enkel ... -
Crack localization and the interplay between stress enhancement and thermal noise
Sinha, Santanu; Roy, Subhadeep; Hansen, Alex (Peer reviewed; Journal article, 2021)We study the competition between thermal fluctuations and stress enhancement in the failure process of a disordered system by using a local load sharing fiber bundle model. The thermal noise is introduced by defining a ... -
Disorder-induced non-linear growth of fingers in immiscible two-phase flow in porous media
Sinha, Santanu; Méheust, Yves; Fyhn, Hursanay; Roy, Subhadeep; Hansen, Alex (Journal article; Peer reviewed, 2024)Immiscible two-phase flow in porous media produces different types of patterns depending on the capillary number Ca and viscosity ratio M. At high Ca, viscous instability of the fluid–fluid interface occurs when the displaced ... -
Dynamic Wettability Alteration in Immiscible Two-phase Flow in Porous Media: Effect on Transport Properties and Critical Slowing Down
Flovik, Vegard; Sinha, Santanu; Hansen, Alex (Journal article; Peer reviewed, 2015)The change in contact angles due to the injection of low salinity water or any other wettability altering agent in an oil-rich porous medium is modeled by a network of disordered pores transporting two immiscible fluids. ... -
Effective rheology of immiscible two-phase flow in porous media consisting of random mixtures of grains having two types of wetting properties
Fyhn, Hursanay; Sinha, Santanu; Hansen, Alex (Peer reviewed; Journal article, 2023)We consider the effective rheology of immiscible two-phase flow in porous media consisting of random mixtures of two types of grains having different wetting properties using a dynamic pore network model under steady-state ... -
Effective rheology of two-phase flow in a capillary fiber bundle model
Roy, Subhadeep; Hansen, Alex; Sinha, Santanu (Journal article; Peer reviewed, 2019)We investigate the effective rheology of two-phase flow in a bundle of parallel capillary tubes carrying two immiscible fluids under an external pressure drop. The diameter of the tubes vary along the length which introduce ... -
Ensemble distribution for immiscible two-phase flow in porous media
Savani, Isha; Bedeaux, Dick; Kjelstrup, Signe; Vassvik, Morten; Sinha, Santanu; Hansen, Alex (Journal article, 2017)We construct an ensemble distribution to describe steady immiscible two-phase flow of two incompressible fluids in a porous medium. The system is found to be ergodic. The distribution is used to compute macroscopic flow ... -
Flow-Area Relations in Immiscible Two-Phase Flow in Porous Media
Roy, Subhadeep; Sinha, Santanu; Hansen, Alex (Journal article; Peer reviewed, 2020)We present a theoretical framework for immiscible incompressible two-phase flow in homogeneous porous media that connects the distribution of local fluid velocities to the average seepage velocities. By dividing the pore ... -
Fluid Meniscus Algorithms for Dynamic Pore-Network Modeling of Immiscible Two-Phase Flow in Porous Media
Sinha, Santanu; Gjennestad, Magnus Aashammer; Vassvik, Morten; Hansen, Alex (Peer reviewed; Journal article, 2021)We present in detail a set of algorithms for a dynamic pore-network model of immiscible two-phase flow in porous media to carry out fluid displacements in pores. The algorithms are universal for regular and irregular pore ... -
Local statistics of immiscible and incompressible two-phase flow in porous media
Fyhn, Hursanay; Sinha, Santanu; Hansen, Alex (Peer reviewed; Journal article, 2023)We consider immiscible and incompressible two-phase flow in porous media under steady-state conditions using a dynamic pore network model. We focus on the fluctuations in a Representative Elementary Area (REA), with the ... -
Phase transitions and correlations in fracture processes where disorder and stress compete
Sinha, Santanu; Roy, Subhadeep; Hansen, Alex (Peer reviewed; Journal article, 2020)We study the effect of the competition between disorder and stress enhancement in fracture processes using the local load sharing fiber bundle model, a model that hovers on the border between analytical tractability and ... -
Rheology of high-capillary number two-phase flow in porous media
Sinha, Santanu; Gjennestad, Magnus Aashammer; Vassvik, Morten; Winkler, Mathias; Hansen, Alex; Flekkøy, Eirik Grude (Journal article; Peer reviewed, 2019)Flow of immiscible fluids in porous media at high capillary numbers may be characterized by an effective viscosity. We demonstrate that the effective viscosity is well-described by the Lichtenecker-Rother equation. Depending ... -
Role of Pore-Size Distribution on Effective Rheology of Two-Phase Flow in Porous Media
Roy, Subhadeep; Sinha, Santanu; Hansen, Alex (Peer reviewed; Journal article, 2021)Immiscible two-phase flow of Newtonian fluids in porous media exhibits a power law relationship between flow rate and pressure drop when the pressure drop is such that the viscous forces compete with the capillary forces. ... -
A statistical mechanics framework for immiscible and incompressible two-phase flow in porous media
Hansen, Alex; Flekkøy, Eirik Grude; Sinha, Santanu; Slotte, Per Arne (Peer reviewed; Journal article, 2022)We construct a statistical mechanics for immiscible and incompressible two-phase flow in porous media under local steady-state conditions based on the Jaynes maximum entropy principle. A cluster entropy is assigned to our ... -
Steady-State Two-Phase Flow of Compressible and Incompressible Fluids in a Capillary Tube of Varying Radius
Cheon, Hyejeong; Fyhn, Hursanay; Hansen, Alex; Wilhelmsen, Øivind; Sinha, Santanu (Peer reviewed; Journal article, 2023)We study immiscible two-phase flow of a compressible and an incompressible fluid inside a capillary tube of varying radius under steady-state conditions. The incompressible fluid is Newtonian and the compressible fluid is ... -
Studies of the Configurational Probability of Immiscible Two-Phase Flow in Porous Media
Brevig, Marthe (Master thesis, 2021)I denne oppgaven er en studie av konfigurasjonssannsynligheten for ublandbar tofasestrømning i porøse medier blitt utført. For å simulere strømningen, er en dynamisk nettverksmodell blitt tatt i bruk. Markov Chain Monte ... -
Transition from viscous fingers to foam during drainage in heterogeneous porous media
Lanza, Federico; Sinha, Santanu; Hansen, Alex; Rosso, Alberto; Talon, Laurent (Peer reviewed; Journal article, 2023)We investigate the behavior of drainage displacements in heterogeneous porous media finding a transition from viscous fingering to foam-like region. A pore network model incorporating the formation of blobs is adopted to ...