Article
Mechanics
Henry von Wahl, Thomas Richter, Stefan Frei, Thomas Hagemeier
Summary: The study evaluates various finite-element approaches for fluid-structure interaction problems through comparison with physical experiment data. By examining the trajectories of single particles in highly viscous fluid and their interaction with the tank wall, the study highlights the challenges posed by transitional flows between creeping and turbulent regimes. Different numerical methods are explored for falling particles, including the comparison of ALE approach with unfitted moving domain method and the use of Nitsche's method for FSI-contact treatment.
Article
Engineering, Multidisciplinary
Maximilian Balmus, Johan Hoffman, Andre Massing, David A. Nordsletten
Summary: In this work, a new stabilized approach for solving incompressible Navier-Stokes equations on fixed overlapping grids is proposed. The approach is based on the partition of unity finite element method and improves computational efficiency by lowering grid resolution requirements and allowing for velocity and pressure discretizations that do not satisfy the inf-sup condition. The authors provide implementation details and identify four key options to improve code efficiency. Through various tests, the new method demonstrates comparable accuracy to the single mesh boundary-fitted version of the same solver and shows a synergistic effect of the implementation options in reducing residual assembly time and achieving good load balancing properties.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Thermodynamics
Nahid Fatima, Kottakkaran Sooppy Nisar, Sidra Shaheen, Muhammad Bilal Arain, Nouman Ijaz, Taseer Muhammad
Summary: The present study measures the thermal and mass transfer of a two-layered flow of viscous fluid induced by cilia motion in a channel. Cilia are categorized into two types: motile and non-motile cilia, with the former used for locomotion and sensory processing. Cilia tissue cells in the lungs clear away liquids or solids, while protozoans with cilia use them for movement. A fluid flow model is developed using the Homotopy Perturbation Method (HPM) and MATHEMATICA software to obtain solutions for temperature, fluid velocity, and concentration profile. The results show graphical representations of emerging parameters, including extreme temperature and velocity profiles in the inner layer and higher values at the outer layers of fluid. This study is the first of its kind in the literature.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Hamideh Hassanpour Guilvaiee, Florian Toth, Manfred Kaltenbacher
Summary: This study presents a finite element method for modeling the interaction between compressible fluids and flexible solids. The method is validated through several test cases and shows good agreement with analytical solutions. Additionally, the study explores different numerical methods and convergence, and demonstrates the potential application of modeling FSI in miniature systems.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Chemistry, Physical
Venugopala Swami Punati, Mahesh S. Tirumkudulu
Summary: The drying phenomenon in polymer coatings was investigated using a model that accounts for polymer concentration, porous structure, and stress in the coating. The governing equations were solved numerically, showing good agreement between predictions and measurements.
Article
Computer Science, Interdisciplinary Applications
Zhao Lu, Wan-Huan Zhou, Zhen-Yu Yin, Jie Yang
Summary: This paper develops a one-dimensional slurry infiltration model considering the viscosity of the slurry and validates the model through experimental tests. The model can recommend the optimal slurry viscosity and predict the results of slurry infiltration.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Construction & Building Technology
Mosbeh R. Kaloop, Pijush Samui, Jae-Joung Kim, Jong Wan Hu, Ahmed Ramzy
Summary: The aim of this study is to predict the accurate stress intensity factor (SIF) of a crack propagating in offshore piping, and four soft computing techniques are compared. The results show that the Relevance Vector Machine (RVM) and minimax probability machine regression (MPMR) models perform better than other models in predicting SIF.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Geochemistry & Geophysics
Wei Zhang, Zong Dai, Bin Gong, Yahui Wang, Xiaolin Zhang, Xiao Chen
Summary: A hybrid fracture characterization method was proposed to accurately model carbonate reservoirs in the South China Sea, utilizing traditional dual-porosity/dual-permeability (DP) method for small-scale fractures and embedded discrete fracture method (EDFM) for large-scale fractures. By calculating transmissibilities among different grid mediums, the hybrid DP+EDFM model improved water cut matches and accurately predicted water breakthrough in fractured reservoirs compared to conventional DP models.
Article
Engineering, Multidisciplinary
Iram Showkat, A. Mushtaq, M. Mustafa
Summary: This research investigates the flow around a stagnation point on a vertical stretching cylinder in a pseudo-plastic fluid using numerical analysis. The study incorporates the Carreau fluid model to account for the pseudo-plastic effects. The buoyancy force term and shear-thinning effect are studied for both assisting and opposing flow situations.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
F. Gul, K. Maqbool, A. B. Mann
Summary: The thermal analysis of electroosmotic flow in a vertical ciliated tube with viscous dissipation and heat source is discussed, presenting three different cases of flow with varying effects. Exact solutions are calculated for velocity and temperature fields in the presence of heat source and buoyancy force, and by the Adomian decomposition method for the case of viscous dissipation. The mathematical model simplifies the equations and shows significant effects of electroosmosis on velocity and temperature profiles.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Computer Science, Interdisciplinary Applications
Yang Xia, Shiming Wei, Yinghao Deng, Yan Jin
Summary: In this study, a method using extended finite element method (XFEM) to simulate the flow dynamics of multiscale fracture networks is proposed and validated in two different cases. The method shows improved accuracy and robustness in representing pressure gradient singularities and simulating fluid flow in complex fracture networks.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Materials Science, Composites
Yuncong Feng, Zhibin Han, Rui Li, Weizhao Zhang
Summary: In this study, a finite element modeling method was developed to predict the curing-induced deformation of CFRP. The thermo-viscoelastic constitutive law and other material model modules were used to simulate the thermal-mechanical behavior. The method was validated using experiments on bi-lamina beams cured with different process parameters.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Review
Mechanics
K. Hanjalic, B. E. Launder
Summary: This paper examines the evolution of closing the Reynolds-averaged Navier-Stokes equations by approximating the Reynolds stresses via the second-moment transport equations. This approach proposed by Rotta contrasts with the usual method of computing turbulent viscosity to deduce turbulent stresses. The paper covers the development of this approach and provides examples of its applications in complex shear flows.
Article
Water Resources
Anis Younes, Behshad Koohbor, Benjamin Belfort, Philippe Ackerer, Joanna Doummar, Marwan Fahs
Summary: The research presents a new efficient and accurate 2D numerical model for dense contaminant transport in unsaturated porous media, allowing simulation of large-scale problems with advanced spatial discretization methods and higher-order time integration techniques. This model's robustness and accuracy are demonstrated through comparison with a widely used commercial code based on the standard finite element method, and its applicability to large-scale problems is further explored through simulations of saltwater intrusion under climate change projection and long-term pumping regimes for the Akkar coastal aquifer in Lebanon using a simplified 2D conceptual model.
ADVANCES IN WATER RESOURCES
(2022)
Article
Energy & Fuels
Raed H. Allawi, Mohammed S. Al-Jawad
Summary: This study focused on the stress redistribution in depleted reservoirs due to changes in pore pressure, with a focus on vertical stress, maximum and minimum horizontal stress changes, and their impact on the mud weight window. By using 1D and 4D geomechanical models, the study analyzed the mechanical rock properties, stress, and pore pressure, and determined the stress distribution in the reservoir. The results showed classifications of reservoir areas based on depletion and changes in stress, leading to a narrow mud weight window.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Review
Geosciences, Multidisciplinary
Alik Ismail-Zadeh, Shota Adamia, Aleksandre Chabukiani, Tamaz Chelidze, Sierd Cloetingh, Michael Floyd, Alexander Gorshkov, Alexei Gvishiani, Tahir Ismail-Zadeh, Mikhail K. Kaban, Fakhraddin Kadirov, Jon Karapetyan, Talat Kangarli, Jemal Kiria, Ivan Koulakov, Jon Mosar, Tea Mumladze, Birgit Mueller, Nino Sadradze, Rafig Safarov, Frank Schilling, Alexander Soloviev
EARTH-SCIENCE REVIEWS
(2020)
Article
Geochemistry & Geophysics
Igor Tsepelev, Alik Ismail-Zadeh, Oleg Melnik
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Editorial Material
Geosciences, Multidisciplinary
Alik Ismail-Zadeh
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2020)
Article
Geochemistry & Geophysics
Laura Petrescu, Felix Borleanu, Mircea Radulian, Alik Ismail-Zadeh, Liviu Matenco
Summary: The study of earthquake nests in the Vrancea Seismic Zone reveals different stress states in the crust and within the seismic source body, highlighting the vertical coherence of tectonic stress and the mechanisms of brittle failure and stress transmission. Dehydration embrittlement is suggested to contribute to generating earthquakes, while ambient mantle flow may also promote stress buildup within the crust.
Editorial Material
Geosciences, Multidisciplinary
Alik Ismail-Zadeh
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
Article
Geochemistry & Geophysics
I. A. Tsepelev, A. T. Ismail-Zadeh, O. E. Melnik
Summary: This study focuses on an ancient lava flow in the Summit Lake region of Yellowstone National Park, using numerical models to analyze the impact of underlying surface and lava flow viscosity on flow dynamics. It was found that changes in lava viscosity can significantly affect the flow speed and thickness, leading to morphological changes in the flow.
IZVESTIYA-PHYSICS OF THE SOLID EARTH
(2021)
Article
Multidisciplinary Sciences
Andreas Helfrich-Schkabarenko, Alik Ismail-Zadeh, Aron Sommer
Summary: This paper demonstrates the use of the superposition principle in an active exterior cloaking device for hiding electric potentials in an electroconductive domain. Additionally, an active exterior illusion device is introduced to detect signal patterns corresponding to arbitrarily chosen current sources. The numerical experiments show reasonable cloaking and illusion performance, indicating potential applications in various fields such as subsurface geo-exploration and electrical engineering.
SCIENTIFIC REPORTS
(2021)
Letter
Geosciences, Multidisciplinary
Alik Ismail-Zadeh
Summary: This article highlights the challenges of assessing the time-dependent nature of disaster risk, emphasizes the interconnectedness between natural hazards, climate change, vulnerability, and exposure, and underscores the importance of preventive measures and public awareness.
Letter
Multidisciplinary Sciences
Corrie S. Moreau, Jessica L. Ware
Article
Geochemistry & Geophysics
Alik Ismail-Zadeh, Alexander Soloviev
Summary: This article provides an overview of the changing understanding of the occurrence and recurrence time of large earthquakes through the use of numerical modelling and earthquake simulations. It also reviews the advancements in the modelling of lithospheric block-and-fault dynamics over the past thirty years, and identifies key factors that influence earthquake sequences, clustering, and magnitude.
SURVEYS IN GEOPHYSICS
(2022)
Article
Environmental Sciences
Marco Giovanni Malusa, Enrico Brandmayr, Giuliano Francesco Panza, Fabio Romanelli, Simona Ferrando, Maria Luce Frezzotti
Summary: Researchers have studied the fate of carbon released during cold subduction by analyzing an unusually deep earthquake beneath Milan. They found that carbon-rich melts were present and may contribute to atmospheric carbon dioxide.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
Yekaterina Y. Kontar, Alik Ismail-Zadeh, Paul Arthur Berkman, Patrizia Duda, Sir Peter Gluckman, Ilan Kelman, Virginia Murray
Summary: Establishing national knowledge exchange centers (KECs) can facilitate global efforts in risk monitoring, assessment, and reduction. Through KECs, countries can enhance resilience towards disaster risks by sharing information, strategies, and scientific evidence.
PROGRESS IN DISASTER SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Yan Zhang, Zhongliang Wu, Fabio Romanelli, Franco Vaccari, Changsheng Jiang, Shanghua Gao, Jiawei Li, Vladimir G. Kossobokov, Giuliano F. Panza
Summary: This paper discusses the possible combination of Earthquake Early Warning (EEW) and Neo-deterministic Seismic Hazard Assessment (NDSHA), proposing a new warning model, EEW2.0, aimed at providing differentiated warning alerts to various end-users based on seismic hazard assessment results. The implementation of EEW2.0 involves classification of hazard potential, determination of source areas, building hazard databases, and equipping unique decision frameworks for specific end-users. EEW2.0 plays an active role in protecting lives and reducing economic losses, with attention and resources focused on reducing seismic and secondary risk in the 21st century.
Article
Geochemistry & Geophysics
Yu. V. Starodubtseva, I. S. Starodubtsev, A. T. Ismail-Zadeh, I. A. Tsepelev, O. E. Melnik, A. I. Korotkii
Summary: The study focuses on estimating magma viscosity by comparing observed and simulated lava dome morphological forms, using a two-dimensional axisymmetric model. By considering the growth of crystal content and discharge rate, the research evaluates the deviation between different dome shapes and determines the best fit using the structural similarity index measure. This approach can be extended to analyze three-dimensional case studies for natural lava dome growth restoration.
JOURNAL OF VOLCANOLOGY AND SEISMOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Olympa Baro, Abhishek Kumar, Alik Ismail-Zadeh
GEOMATICS NATURAL HAZARDS & RISK
(2020)