Article
Mechanics
Vandita Sharma, Hamirul Bin Othman, Yuichiro Nagatsu, Manoranjan Mishra
Summary: Through numerical computations and experimental studies, miscible viscous fingering (VF) in an annulus is examined, showing contrast to classical radial VF and instability of a straight displaced slice. The persistence of VF in a miscible annular ring is observed, with variance as a non-monotonic function indicating interaction of two fronts, pressure fingers growing faster than concentration fingers. The variation of finger length with flow rate depends on the amount of more viscous fluid in the annulus, with critical parameters for instability related to viscosity contrast and sample amount.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Priya Verma, Vandita Sharma, Manoranjan Mishra
Summary: This study provides numerical insights into the radial displacement of two viscously stable reactants undergoing an infinitely fast chemical reaction, expanding the numerical knowledge of the interaction between chemical reaction and hydrodynamic instability. By calculating the onset time of instability and dividing the time domain into stable and unstable zones, the characteristics of reactants in terms of flow stability can be characterized. The dependence of the onset time of instability on the mobility ratio and the Peclet number is obtained, and the length of the fingers in the unstable zone is found to be dependent on the sign of the mobility ratio.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Shoji Seya, Ryuta X. Suzuki, Yuichiro Nagatsu, Takahiko Ban, Manoranjan Mishra
Summary: We developed coupled evolution equations for viscous fingering and phase separation, and demonstrated the transition of VF pattern into droplet formation pattern by spinodal decomposition effect. The experimental results matched the theoretical predictions.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Min Chan Kim, Lopamudra Palodhi, Joung Sook Hong, Manoranjan Mishra
Summary: The coupled effects of thermodynamic and hydrodynamic instabilities during viscous fingering (VF) are studied using a modified Cahn-Hilliard phase-field model. The temporal evolution of spatial inhomogeneities is investigated by describing the free energy using a modified Flory-Huggins model. The governing equations are solved using COMSOL multiphysics software, and the results are in agreement with experimental and numerical results obtained using classical models. The effects of the Margules parameter and gradient parameter on VF are systematically studied, showing asymmetric features and a stronger thermodynamic effect with increasing phase separation and droplet formation.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Oleg A. Logvinov
Summary: The renowned problem of viscous fluid displacement by a less viscous one in a Hele-Shaw cell is considered in this study. Both fluids exhibit non-Newtonian properties with power-law viscosity dependence. A unified approach is used to derive averaged two-dimensional equations of motion, and linear stability analysis of the radial interface is conducted with a new key idea of characteristic size selection even without stabilizing factors.
Article
Mechanics
Yuka F. Deki, Yuichiro Nagatsu, Manoranjan Mishra, Ryuta X. Suzuki
Summary: Viscous fingering or Saffman-Taylor instability occurs when a more mobile fluid displaces a less mobile one in porous media, creating finger-like patterns. The effective interfacial tension (EIT) acts like capillary force at the miscible interface. Numerical studies have shown that fingers are wider with EIT. However, a recent experiment on a miscible system with EIT observed finger widening with increasing flow rate, which is not observed in other systems. This study numerically investigates the effect of injection flow rates on miscible viscous fingering with and without EIT, and explains the mechanism using a one-dimensional analysis of concentration and EIT profiles.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
H. K. Moffatt, Howard Guest, Herbert E. Huppert
Summary: The behavior of a viscous drop squeezed between two horizontal planes is analyzed through theory and experiment. The theory predicts the growth of the drop radius over time with a power law of t(1/8) when the squeezing force is constant and surface tension is neglected. The experimental results show that the evolution of the drop tends towards a stable circular shape when surface tension is taken into account.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Chemical
Daniel Keable, Alistair Jones, Samuel Krevor, Ann Muggeridge, Samuel J. Jackson
Summary: This study presents the results of displacement experiments in a Hele-Shaw cell, which show the complexity of fingering patterns increases with viscosity ratio and Peclet number, and the onset of fingering is delayed compared to linear displacements. Numerical simulations provide good predictions of breakthrough times and sweep efficiency at intermediate Peclet numbers, but fail to replicate fine-scale and macroscopic measures. We suggest exploring 3D models with varying dispersion formulations to capture a wider range of effects at high viscosity ratio and Peclet number.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Physics, Mathematical
Meng Zhao, Pedro Anjos, John Lowengrub, Wenjun Ying, Shuwang Li
Summary: We studied the nonlinear dynamics of a moving interface in a Hele-Shaw cell under an in-plane applied electric field. We developed a numerically accurate method to solve a coupled integral equation system. Although stiffness due to high-order spatial derivatives can be removed, the simulation is still expensive due to the slow interface dynamics. We used a rescaling scheme to accelerate the dynamics and reduce computational cost, revealing the effects of positive and negative currents on interface stability and pattern formation.
COMMUNICATIONS IN COMPUTATIONAL PHYSICS
(2023)
Article
Energy & Fuels
Baizheng An, Daniel Solorzano, Qingwang Yuan
Summary: This study experimentally investigates the dynamics of miscible viscous fingering and reveals three new regimes in addition to the diffusion-dominated and convection-dominated flow regimes. The study provides new insights into the fundamental mechanisms for miscible fluid displacements in various applications.
Article
Mathematics, Applied
Amlan K. Barua
Summary: This article presents a spectrally accurate boundary integral method to investigate the evolution of a Hele Shaw blob in a rotating, radial cell with time dependent gap. The method of complex moments is used to characterize the solution of the moving boundary problem and linear analysis is conducted to investigate the morphology. The results suggest a destabilizing influence of rotation. Numerical simulations using a boundary integral technique reveal that rotation causes a more complex pattern on the fluid interface, with the formation of narrow fingers and more splitting. A method for controlling viscous fingering is also proposed and validated through simulations.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Chemistry, Physical
Dongqi Li, Zhibing Yang, Renjun Zhang, Ran Hu, Yi-Feng Chen
Summary: The presence of particles in multiphase flow can alter interfacial dynamics and induce various morphological patterns, while particle aggregations significantly enhance interface instability. Experimental findings demonstrate that particle-induced perturbations lead to earlier fingering and more fingers, with an in-depth explanation of the particle deposition mechanism.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Gongtian Gu, Jin Huang, Wenhu Han, Cheng Wang
Summary: Experimental investigation was conducted on flame propagation in Hele-Shaw cells with a micro-sized gap. Different regimes of flame propagation were identified based on gap size, leading to various flame front morphologies and speeds. The non-accelerating flame in narrow gaps exhibited distinct behaviors compared to the self-accelerating flame in wider gaps, influenced by hydrodynamic instabilities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Mechanics
Katarzyna N. Kowal
Summary: The study demonstrates a novel instability in unconfined viscous bands or free-surface flows, known as viscous banding instabilities. Unlike the Saffman-Taylor instabilities in porous media, these instabilities are driven by a viscosity contrast and do not require confinement like in a Hele-Shaw cell. The main difference lies in the driving mechanisms, with Saffman-Taylor instabilities driven by dynamic pressure gradients and viscous banding instabilities driven by hydrostatic pressure gradients related to slope discontinuities.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Sourojeet Chakraborty, Arun Ramachandran
Summary: A depth-averaged, convection-dispersion equation is derived for the particle volume fraction distribution in the pressure-driven flow of a concentrated suspension of neutrally buoyant, non-colloidal particles. The Taylor-dispersion coefficient scales with characteristic velocity, channel depth and particle radius. Shear-induced migration causes particle redistribution perpendicular to flow. The linear stability analysis shows growth rate and wavenumber scaling with velocity and particle size in the flow direction.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Energy & Fuels
Reza Rezaei Dehshibi, Ali Mohebbi, Masoud Riazi, Firoozeh Danafar
Article
Energy & Fuels
Pouyan Ahmadi, Behnam Shahsavani, Mohammad Reza Malayeri, Masoud Riazi
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Energy & Fuels
Mohammad Reza Aghajanzadeh, Pouyan Ahmadi, Mohammad Sharifi, Masoud Riazi
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Chemistry, Physical
B. Shahsavani, P. Ahmadi, M. R. Malayeri, M. Riazi, G. A. Safian
JOURNAL OF MOLECULAR LIQUIDS
(2019)
Article
Energy & Fuels
Hosein Rezvani, Yousef Kazemzadeh, Mohammad Sharifi, Masoud Riazi, Sanaz Shojaei
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Energy & Fuels
Hossein Bahraminejad, Abbas Khaksar Manshad, Masoud Riazi, Jagar A. Ali, S. Mohammad Sajadi, Alireza Keshavarz
Article
Chemistry, Physical
Zeinab Derikvand, Amin Rezaei, Rafat Parsaei, Masoud Riazi, Farshid Torabi
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Energy & Fuels
Stefania Betancur, Carol M. Olmos, Maximiliano Perez, Betiana Lerner, Camilo A. Franco, Masoud Riazi, Jaime Gallego, Francisco Carrasco-Marin, Farid B. Cortes
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Engineering, Chemical
Mehdi Razavifar, Aliya Mukhametdinova, Ehsan Nikooee, Alexander Burukhin, Amin Rezaei, Alexey Cheremisin, Masoud Riazi
Summary: This study evaluates the porous structure of a carbonate rock sample using various techniques, with μCT providing porosity data closer to gas porosimetry compared to MIP. NMR technique yielded lower porosity values but higher than the prediction by MIP.
TRANSPORT IN POROUS MEDIA
(2021)
Article
Energy & Fuels
Karol Zapata, Daniel Lopez, Richard D. Zabala, Italo Bahamon, Masoud Riazi, Camilo A. Franco, Farid B. Cortes
Summary: This study aims to develop novel acid nanocapsules with tailored breaking reservoir temperatures for controlled release of acids to dissolve fine particles. Thermolabile nanocapsules were synthesized and characterized, and a nanofluid was formulated for acid dissolution tests. Results showed that the nanocapsules exhibited controlled release properties, increased acid lifetime, and reduced corrosion.
Article
Energy & Fuels
Vadim Fetisov, Adam M. M. Gonopolsky, Maria Yu. Zemenkova, Schipachev Andrey, Hadi Davardoost, Amir H. H. Mohammadi, Masoud Riazi
Summary: This study determines the costs of using CO2 capture technologies in the refining and petrochemical sectors. Depending on the process and method used, CO2 emissions costs of EUR 30 to 40 per ton of CO2 can be avoided. Advanced low-temperature CO2 capture technologies may not provide significant benefits compared to conventional technologies. An analysis estimated a reduction potential of about 0.5-1 Gt/yr for the oil and gas industries using short- and long-term technologies. The integration of CO2 capture into the oil production process helps reduce costs and emissions.
Article
Polymer Science
Aliasghar Parsaie, Masoud Riazi, Abdolreza Kazemi Abadshapoori, Mohammad Mohammadi-Khanaposhtani, Yousef Tamsilian
Summary: This study focused on the effects of sponge density and magnesium stearate loadings on the separation performance of superhydrophobic magnesium stearate coated-polyurethane. The results showed that the surface of the sponge became rougher after being coated with magnesium stearate, while the sponge density had no significant impact on the water contact angle and oil absorption rate. The absorption capacity of the modified sponges for various oils and solvents was also tested and showed promising results.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Multidisciplinary Sciences
Vadim Fetisov, Yury V. Ilyushin, Gennadii G. Vasiliev, Igor A. Leonovich, Johannes Mueller, Masoud Riazi, Amir H. Mohammadi
Summary: This article presents the results of a numerical experiment and analysis of temperature fields in a gas pipeline using cooling elements. The analysis revealed several principles for temperature field formation, highlighting the importance of maintaining a relative temperature for gas pumping. The experiment aimed to determine the optimal distance for installing cooling elements to achieve optimal gas pumping, considering the synthesis of control laws and assessment of control error. The developed technique allows for the evaluation of the regulation error of the control system.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Ali Khalilnezhad, Hosein Rezvani, Alireza Talebi, Parastoo Ganji, Tina Puntervold, Masoud Riazi
Summary: The purpose of this research is to investigate the use of aluminananoparticles in low-salinity brine for enhanced oil recovery in carbonate oil reservoirs. Analyses including oil/water interfacial tension, zeta potential, and rock wettability were performed to select the optimized dispersions for spontaneous imbibition tests. The results showed that the addition of alumina nanoparticles in low-salinity brine can significantly reduce the oil/water interfacial tension, improve the wettability of the rock, and enhance oil production.
Review
Energy & Fuels
Amin Sharifi, Rohaldin Miri, Masoud Riazi
Summary: The surfactant EOR is considered a promising approach for enhancing oil recovery due to the changing energy supply and demand and the non-renewable nature of world oil reservoirs. However, surfactants face challenges such as high adsorption, low stability, and poor performance in harsh conditions like high temperature, high salinity, and dense carbonate rocks. There is currently no established procedure or framework for systematically selecting the best surfactant for EOR in dense carbonates.