Review
Computer Science, Interdisciplinary Applications
Hefeng Chen, Tobias Gleim
Summary: This paper establishes different axisymmetric and two-dimensional models for a levitation device by combining the Maxwell equations with the balance of linear momentum. A high order finite element discretization using Galerkin's method in space and the generalized Newmark-alpha method in time are developed for the electro-magneto-mechanical approach. Several studies on spatial and temporal discretization with respect to convergence will be investigated, along with examining the boundary influences and the domain size with respect to the levitation device.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Sajjan Pokhrel, Agus P. Sasmito, Atsushi Sainoki, Toshiyuki Tosha, Tatsuya Tanaka, Chiaki Nagai, Seyed Ali Ghoreishi-Madiseh
Summary: This study investigates a 500 m deep coaxial borehole heat exchanger system for geothermal power generation through experimental and computational analyses. The numerical model accurately predicts the underground temperature distribution and the output power of the geothermal system. A parametric study shows that the total thermal energy generated by the geothermal system can reach up to 194 MWh, and after extraction is terminated, the ground temperature can recover to around 86% of the initial temperature within 456 hours.
Article
Mathematics, Applied
Bruna C. dos Santos, Sergio M. Oliva, Julio D. Rossi
Summary: In this paper, a splitting approach and numerical method are studied to approximate solutions to an evolution problem that couples local and nonlocal diffusion operators. The proposed method takes advantage of a splitting structure for the evolution equation to separately handle the local and nonlocal parts. Convergence of the method is proven and numerical experiments demonstrate qualitative features of the model.
COMPUTATIONAL & APPLIED MATHEMATICS
(2022)
Article
Geochemistry & Geophysics
F. Zyserman, L. B. Monachesi, A. H. Thompson, T. D'Biassi, L. Jouniaux, P. Gauzellino
Summary: This work presents numerical modelling of electroseismic conversions with electric field sources in the atmosphere. It shows that layered structures of conductivity anomalies can generate rotated electric fields at reservoir depths. However, the high-power dipole sources limit the practical application of these methods in hydrocarbon exploration. The research explores the potential use of environmental electric fields to create useful electroseismic conversions.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Energy & Fuels
Muhammad Asad, Vincenzo Guida, Alessandro Mauro
Summary: In this paper, a three-dimensional numerical model based on the finite element method is developed to study the fluid flow and heat transfer phenomena in a downhole heat exchanger. The behavior of the heat exchanger is analyzed experimentally and numerically, and the influence of salinity on its performance is studied.
Article
Mathematics, Interdisciplinary Applications
Xiaoying Dai, Stefano De Gironcoli, Bin Yang, Aihui Zhou
Summary: This paper investigates the energy minimization model in ensemble Kohn-Sham density functional theory for metallic systems and proposes an algorithm to solve the problem. Numerical experiments show that the algorithm is efficient for large scale metallic systems and produces convergent numerical approximations.
MULTISCALE MODELING & SIMULATION
(2023)
Article
Engineering, Electrical & Electronic
Fabrizio Loreto, Daniele Romano, Giuseppe Pettanice, Giulio Antonini
Summary: Transient analysis of electromagnetic systems is widely used in the design of electrical and electronic devices. Time domain methods and frequency domain analysis techniques are commonly used, but numerical inversion of the Laplace transform (NILT) provides a valuable alternative. This work aims to compare two popular methods for numerical inverse Laplace transform computation, NILT and fast inversion of the Laplace transform (FILT), and highlight their issues, limitations, and possible solutions.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Chemistry, Physical
Fabijan Pavosevic, Sharon Hammes-Schiffer
Summary: The accurate description of nuclear quantum effects is crucial for understanding chemical and biological processes. Researchers have developed a new NEO coupled cluster method that explicitly considers triple electron-electron-proton excitations, resulting in highly accurate proton densities and affinities. Additionally, a low-cost NEO-SOS'-CC2 method has been developed, enabling applications in chemical and photochemical processes for large molecular systems.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Fatemeh Mohammadizadeh, Saeede Rashidi, S. Reza Hejazi
Summary: This paper investigates the symmetry operators and conservation laws of the fractional Klein-Gordon equation, and extends the Chebyshev spectral collocation method to the space-time-fractional case to provide numerical results and conservation laws for the equation.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2021)
Article
Acoustics
Xuhong Miao, Pei Jiang, Fuzhen Pang, Yang Tang, Haichao Li, Guanglei Qu, Jun Li
Summary: This paper establishes an electromagnetic-mechanical-acoustic coupled three-dimensional finite element method for oil-immersed transformers, and explores the influences of radiating grids and input voltage on their vibration and noise characteristics. The study proves the effectiveness of the calculation model and quantitatively analyzes the effects of different factors.
Article
Engineering, Environmental
Line M. Madsen, Thue Bording, Denys Grombacher, Nikolaj Foged, Neil Foley, Hilary A. Dugan, Peter T. Doran, Jill Mikucki, Slawek Tulaczyk, Esben Auken
Summary: The transient electromagnetic (TEM) method is a non-invasive geophysical tool that is well-suited for subsurface imaging in cold and polar regions. This study compares TEM data acquired with ground-based and airborne systems, demonstrating their mapping capabilities in high latitude polar environments. The results show the consistency between the two approaches, with both providing high resolution and deep penetration depths suitable for mapping hydrological systems and identifying the base of glaciers.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Orell Garten, Christoph Statz, Steffen Gerling, Jochen Jebramcik, Jan Barowski, Dirk Plettemeier, Ilona Rolfes
Summary: This work addresses volume scattering effects using the physical optics approach, reducing modeling and computational effort for simulating scattering from complex materials. The results show a natural progression from classical PO to the proposed formulation. Four specializations of the algorithm highlight its versatility.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Chemistry, Multidisciplinary
Jozef Prokop, Josef Vican, Jozef Jost
Summary: The paper aims to compare the suitability of established design approaches for slender steel beam-columns based on European standards through numerical simulations. A finite element model was validated using experimental analysis, and the resistance of the beam-columns was observed using a commercial software program ANSYS. The conclusions discuss the suitability of the design approaches and highlight key findings from this research.
APPLIED SCIENCES-BASEL
(2021)
Article
Geosciences, Multidisciplinary
Christian Zeeden, Arne Ulfers, Simona Pierdominici, Mehrdad Sardar Abadi, Mathias Vinnepand, Thomas Grelle, Katja Hesse, Katharina Leu, Thomas Wonik
Summary: There are numerous borehole logging datasets available worldwide, but the potential of these datasets for chronostratigraphic analyses through time series analyses is not fully utilized due to the complexity and pitfalls that may discourage non-experienced users. This paper provides an overview of the relevant properties of borehole logging measurements for time series analysis and cyclostratigraphy, and introduces the most relevant time series analyses methods with examples of borehole logging cyclostratigraphy. It highlights the importance of being aware of the specific pitfalls in borehole logging data, such as variations in borehole diameter, effects of drilling fluids, and merging of results from different depth sections.
EARTH-SCIENCE REVIEWS
(2023)
Article
Mathematics, Applied
Farid Bozorgnia, Sonia Seyed Allaei
Summary: A numerical scheme based on modified method of characteristics with adjusted advection (MMOCAA) is proposed to approximate the solution of the system liquid chromatography with multi components case. Various examples and computational tests numerically verify the accuracy and efficiency of the approach.
NUMERICAL METHODS FOR PARTIAL DIFFERENTIAL EQUATIONS
(2023)
Article
Geochemistry & Geophysics
G. Michael Hoversten, Michael Commer, Eldad Haber, Christoph Schwarzbach
GEOPHYSICAL PROSPECTING
(2015)
Article
Geochemistry & Geophysics
Michael Commer, G. Michael Hoversten, Evan Schankee Um
Article
Geochemistry & Geophysics
Steven R. Pride, James G. Berryman, Michael Commer, Seiji Nakagawa, Gregory A. Newman, Donald W. Vasco
GEOPHYSICAL PROSPECTING
(2017)
Article
Green & Sustainable Science & Technology
Michael Commer, Joseph Doetsch, Baptiste Dafflon, Yuxin Wu, Thomas M. Daley, Susan S. Hubbard
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2016)
Article
Environmental Sciences
D. W. Vasco, Steven R. Pride, Michael Commer
WATER RESOURCES RESEARCH
(2016)
Article
Geochemistry & Geophysics
Michael Commer, Peter V. Petrov, Gregory A. Newman
GEOPHYSICAL JOURNAL INTERNATIONAL
(2017)
Article
Computer Science, Interdisciplinary Applications
Michael Commer, Michael B. Kowalsky, Joseph Doetsch, Gregory A. Newman, Stefan Finsterle
COMPUTERS & GEOSCIENCES
(2014)
Article
Geochemistry & Geophysics
Evan Schankee Um, Michael Commer, Gregory A. Newman
GEOPHYSICAL JOURNAL INTERNATIONAL
(2013)
Article
Geochemistry & Geophysics
Evan Schankee Um, Michael Commer, Gregory A. Newman
Article
Geochemistry & Geophysics
Evan Schankee Um, Jihoon Kim, Michael J. Wilt, Michael Commer, Seung-Sep Kim
Article
Geochemistry & Geophysics
Michael Commer, Steve R. Pride, Donald W. Vasco, Stefan Finsterle, Michael B. Kowalsky
Article
Computer Science, Interdisciplinary Applications
Michael Commer, Stefan Finsterle, G. Michael Hoversten
COMPUTATIONAL GEOSCIENCES
(2020)
Article
Geochemistry & Geophysics
Michael Commer, David L. Alumbaugh, Michael Wilt, Abdullah Cihan, Evan S. Um, Robin Petrusak, Jens T. Birkholzer
Summary: Reservoir integrity stewardship during carbon capture and sequestration requires fluid extraction and reinjection as a risk-mitigating method. Crosswell electromagnetics is a technically viable monitoring method, but there are challenges when sequestering deep gas into saline aquifers.
Article
Computer Science, Interdisciplinary Applications
S. Finsterle, M. Commer, J. K. Edmiston, Y. Jung, M. B. Kowalsky, G. S. H. Pau, H. M. Wainwright, Y. Zhang
COMPUTERS & GEOSCIENCES
(2017)