Article
Engineering, Marine
Bo Yang, Fan Yang, Bingchen Liang, Qin Zhang, Zhenlu Wang, Jun Wang
Summary: A two-phase mixture model solver is established for simulating sediment plume and moving plate interaction based on OpenFOAM. It is validated against experiments and Smooth Particle Hydrodynamics (SPH) simulation study, showing good agreement with others. The study is extended to three-dimensional numerical simulations, comparing and analyzing characteristics of sediment concentration, lift and drag on the moving plate, and vortex structure simulated by different turbulence models.
Article
Engineering, Marine
Boyao Wang, Cees van Rhee, Arno Nobel, Geert Keetels
Summary: The study focuses on the use of high-pressure water jets in dredging to move soil, developing a computational fluid dynamics model that accurately predicts cavity dimensions and provides detailed data for studying the cyclic nature of soil failure processes.
Article
Geosciences, Multidisciplinary
Xiaoxiao Chen, Zhixiang Yu
Summary: This study develops a dynamic mesh technology for real-time simulation of snow drifting, and the proposed method has been validated in measured cases.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Agronomy
Illia Chyrva, Mark Jermy, Tara Strand, Brian Richardson
Summary: This study successfully developed a model for multicopter wake and particle dispersion, which is computationally economical and reasonably accurate. The model was validated against field tests and showed sensitivity to various flight parameters. It provided reasonable predictions for different flight trials.
PEST MANAGEMENT SCIENCE
(2023)
Article
Environmental Sciences
Haixu Teng, Fan Geng, Xinyue Feng, Jiajun An, Shihang Li, Changgeng Gui, Shuda Hu, Heng Guo, Fubao Zhou
Summary: The study examines dust generated during the unloading process in a high-rise building for the mine hoist system and analyzes the dispersion of dust during conveyance in the building. The gas-solid two-phase flow in the building is investigated using the CFD-DPM method, with particular attention to the moving conveyance using dynamic mesh technology. Airflow and dust distribution are then studied, and the results align well with field measurements. The research finds that the descending conveyance significantly impacts the flow field and the spatial and temporal distribution of dust, and provides fitting functions to predict PM2.5 emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Nuclear Science & Technology
Lanfei Yuan, Zhipeng Liu, Chenglong Wang, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: In this study, the flow and heat transfer of lead-bismuth eutectic (LBE) under moving conditions were investigated using a sliding mesh method. Experimental validation was conducted, showing good agreement with the numerical model. The results reveal that the flow rate fluctuation is consistent with the motion period, with the amplitude increasing as the maximum range of motion increases and the motion period decreases. Rolling has a more severe influence on system parameters compared to heaving.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Mechanics
Luhaibo Zhao, Yuanheyi Lu, Delong Lu, Zhiyong Tang
Summary: In this study, a general two-phase flow and mass transfer CFD model for bubbling system was developed based on OpenFOAM. The accuracy and stability of the simulations were ensured by investigating the influence of each phase parameter of the Blend interface model. The interphase force models (such as drag, lift, turbulent) and multi-size bubble models (population balance equation and interfacial area transport equation) were studied and compared using visual bubble measurements. Furthermore, the validity of the multi-size bubbling flow coupled mass transfer model was successfully verified by experiments, offering a free and open-source modeling method for industrial applications.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Mechanics
Ranjana Rathaur, Sumana Ghosh
Summary: The present study investigates the interfacial dynamics and flow behavior of water and oil-water in a storage tank pipe. The results show that water and oil-water have different free surface widths during draining, with the oil-water case prone to the formation of air bubbles. Additionally, there is a zone of velocity de-acceleration in the central part of the drain pipe, and velocity and pressure fluctuations are observed at the inlet of the drain port.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)
Article
Multidisciplinary Sciences
Tatsuya Ogawa, Kazui Fukumoto, Hiroshi Machida, Koyo Norinaga
Summary: In this study, a computational fluid dynamics (CFD) simulation was conducted to investigate the chemical vapor deposition of silicon carbide (SiC) in the methyltrichlorosilane (MTS, CH3SiCl3)/H2 system. The SiC thin film growth was controlled by process parameters including temperature and pressure. The proposed reaction mechanism of MTS decomposition and SiC growth was validated by reproducing multiple datasets.
Article
Engineering, Marine
Eirini Katsidoniotaki, Erik Nilsson, Anna Rutgersson, Jens Engstrom, Malin Goteman
Summary: This study evaluates the survivability of a point-absorbing wave energy converter at a selected site in the North Sea based on CFD simulations, focusing on forces on key components and system dynamics. The results contribute to understanding the device's response under extreme wave conditions, particularly in interactions with breaking waves, and provide important insights for design considerations.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Chemical
Julia Hartig, Vidumin Dahanayake, Julie Nguyen, Carter Wilson, Austin M. Barnes, Alan W. Weimer
Summary: A moving porous media (MPM) modeling methodology was developed for reactor-scale CFD simulations of continuous spatial particle atomic layer deposition (ALD). The continuous vibrating reactor process for particle ALD was modeled using a porous media approach. Candidate porous reactor baseplates were characterized experimentally before their permeabilities were used as inputs for the MPM model. Parameter sweeps revealed the dependence of surface titration uniformity and residual gas breakthrough on operating conditions and powder properties. Suboptimal dose start times and inlet gas compositions led to parasitic chemical vapor deposition reactions in the first precursor zone.
Article
Computer Science, Interdisciplinary Applications
Guoliang Chai, Le Wang, Zhaolin Gu, Chunlei Yu, Yigen Zhang, Qinglin Shu, Junwei Su
Summary: This article proposes a consistent and sharp Eulerian fictitious domain method for moving boundary problems, validated through several numerical tests on different types of meshes. The method demonstrates high spatial accuracy and effective suppression of spurious force oscillations, particularly in the flow around a cylinder.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
(2021)
Article
Engineering, Environmental
Alain Islas, Andres Rodriguez Fernandez, Covadonga Betegon, Emilio Martinez-Paneda, Adrian Pandal
Summary: This study conducted numerical simulations of biomass dust explosions using the open-source CFD code OpenFOAM and found that the characteristics of cold flow, particle size, dust concentration, and ignition delay time have significant effects on the explosion process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Construction & Building Technology
Huayuan Zhou, Ke Zhong, Hongwei Jia, Yanming Kang
Summary: This study compares the numerical performances of dynamic mesh update methods provided by ANSYS FLUENT in predicting the flow induced by moving objects indoors, discussing five aspects including accuracy, mesh quality, mesh generation complexity, continuity, and computational efficiency.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Mechanical
Simone Martini, Mitja Morgut, Riccardo Pigazzini
Summary: This paper presents numerical simulations of flow around an elastically-mounted circular cylinder with small damping parameter and small mass ratio, showing that the bi-dimensional approach is effective in the lower branch but major discrepancies are present in the upper branch. The three dimensionality of the flow is stronger in the transition zones between the different branches.
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Engineering, Marine
Andro Bakica, Nikola Vladimir, Inno Gatin, Hrvoje Jasak
Summary: Stringent rules and regulations aiming to reduce ship environmental footprint and improve propulsion efficiency have led to the development of various technical solutions, such as Energy Saving Devices (ESDs). This paper analyzes the hydrodynamic loadings on a circular duct, a typical ESD, of a bulk carrier in calm water and waves using Computational Fluid Dynamics (CFD). The study shows the significant effect of propeller suction on the ESD pressure distribution, highlighting its importance in assessing the structural reliability of ESDs in both calm water and waves.
SHIPS AND OFFSHORE STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Tessa Uroic, Hrvoje Jasak
Summary: This study focuses on the implicit coupling solution approach in computational fluid dynamics, utilizing an algebraic multigrid algorithm for efficient computation. By employing domain decomposition method and parallel selection algebraic multigrid algorithm, the algorithm has been optimized to improve computational efficiency.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Energy & Fuels
Robert Keser, Alberto Ceschin, Michele Battistoni, Hong G. Im, Hrvoje Jasak
Article
Computer Science, Interdisciplinary Applications
Robert Keser, Alberto Ceschin, Michele Battistoni, Hong G. Im, Hrvoje Jasak
Summary: This work presents the implementation, verification, and validation of an incompressible Eulerian multifluid model for polydisperse flows. The model shows good agreement with experimental measurements, stability on different levels of grid refinement, and reduced conservation error with implicit coupling.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
(2021)
Article
Polymer Science
Ahmad Fakhari, Zeljko Tukovic, Olga Sousa Carneiro, Celio Fernandes
Summary: Extrudate swell, a phenomenon that occurs in polymer processing, can be effectively modeled numerically to support design tasks. An improved interface tracking algorithm and the PISO algorithm for grid movement have been developed, showing accuracy and robustness in simulating extrudate swell flows. Inertia's role in extrudate swell has been studied, with the solver's results demonstrating good agreement with reference data in the scientific literature.
Article
Engineering, Multidisciplinary
Ivan Batistic, Philip Cardiff, Zeljko Tukovic
Summary: This paper introduces a new contact boundary condition for finite volume simulations of frictional contact problems, based on penalty based segment-to-segment contact force calculation method. Compared to pointwise contact force calculation algorithm, this approach allows for more accurate and robust treatment of contact area edge.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Engineering, Multidisciplinary
Sinisa Majer, Zeljko Tukovic
Summary: A computational fluid dynamics study was conducted on a salient pole generator to determine the impact of rotor structural elements on windage losses. The analysis showed that centrifugal fans and poles account for a significant portion of the overall windage losses.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2021)
Article
Engineering, Chemical
Robert Keser, Michele Battistoni, Hong G. Im, Hrvoje Jasak
Summary: The article presents an Eulerian multi-fluid model for dynamic behavior of dense evaporating liquid fuel sprays, implemented in the open-source OpenFOAM library. The model employs class method and advanced interfacial momentum transfer models, successfully predicting the complex dynamic behavior of sprays.
Article
Engineering, Civil
Robinson Peric, Vuko Vukcevic, Moustafa Abdel-Maksoud, Hrvoje Jasak
Summary: This study proposes an analytical approach to optimize parameters in flow simulations with free-surface waves, demonstrating its effectiveness in reducing wave reflection errors through comparison with other methods.
COASTAL ENGINEERING
(2022)
Article
Energy & Fuels
Allan B. G. Motta, Roney L. Thompson, Jovani L. Favero, Rodrigo A. C. Dias, Luiz F. L. R. Silva, Francileide G. Costa, Mateus P. Schwalbert
Summary: This study presents a new formulation to study the flow of a reactive non-Newtonian fluid in porous media, by coupling information from different scales and considering the non-Newtonian nature of the fluid. It is found that the rheological properties of the fluid significantly influence dissolution patterns and Pore Volume to Breakthrough curves, with more shear-thinning fluids leading to lower PVbt values.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Polymer Science
Celio Fernandes, Ahmad Fakhari, Zeljko Tukovic
Summary: A new method based on the Arbitrary Lagrangian-Eulerian formulation has been developed to study the viscous flow of polymer melts. This method is validated by comparing the extrudate swell ratio under different flow conditions. Additionally, the study investigates the rheological behavior of the material and essential flow characteristics such as yield stress, inertia, and non-isothermal effects.
Article
Engineering, Multidisciplinary
Seevani Bali, Zeljko Tukovic, Philip Cardiff, Alojz Ivankovic, Vikram Pakrashi
Summary: This article introduces a novel finite volume formulation for geometrically exact beams undergoing large displacements and finite rotations, and demonstrates its effectiveness through various tests.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Energy & Fuels
Robson P. Barboza Junior, Mateus P. Schwalbert, Jovani L. Favero, Rodrigo A. C. Dias, Antonio O. S. Moraes, Luiz F. L. R. Silva, Roney L. Thompson
Summary: This paper proposes a mathematical model to describe the dissolution process associated with carbonate reservoir treatment. The rheology of the acid solution was experimentally obtained and fitted by a Carreau model. The model also considers the transport equation for reaction products, and the solid-liquid interaction at the porous scale. The model was validated against experimental results in plug geometry.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Ivan Batistic, Philip Cardiff, Alojz Ivankovic, Zeljko Tukovic
Summary: This article presents a new implicit coupling procedure for mechanical contact simulations using an implicit cell-centred finite volume method. Both contact boundaries are treated as Neumann conditions, where the prescribed contact force is calculated using a penalty law, which is linearised and updated within the iterative solution procedure. Compared to the currently available explicit treatment, the implicit treatment offers better efficiency for the same accuracy.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2023)
Article
Engineering, Manufacturing
Gowthaman Parivendhan, Philip Cardiff, Thomas Flint, Zeljko Tukovic, Muhannad Obeidi, Dermot Brabazon, Alojz Ivankovic
Summary: This study presents a numerical model of the Laser Beam Powder Bed Fusion (PBF-LB) process that incorporates Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). The model successfully captures the particle distribution in the powder bed and the formation and dynamics of the melt pool. It considers factors such as surface tension, Marangoni convection, and recoil pressure at the metal/gas interface.
ADDITIVE MANUFACTURING
(2023)
Article
Computer Science, Interdisciplinary Applications
Tian Liang, Lin Fu
Summary: In this work, a new shock-capturing framework is proposed based on a new candidate stencil arrangement and the combination of infinitely differentiable non-polynomial RBF-based reconstruction in smooth regions with jump-like non-polynomial interpolation for genuine discontinuities. The resulting scheme achieves high order accuracy and resolves genuine discontinuities with sub-cell resolution.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Lukas Lundgren, Murtazo Nazarov
Summary: In this paper, a high-order accurate finite element method for incompressible variable density flow is introduced. The method addresses the issues of saddle point system and stability problem through Schur complement preconditioning and artificial compressibility approaches, and it is validated to have high-order accuracy for smooth problems and accurately resolve discontinuities.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Gabriele Ciaramella, Laurence Halpern, Luca Mechelli
Summary: This paper presents a novel convergence analysis of the optimized Schwarz waveform relaxation method for solving optimal control problems governed by periodic parabolic PDEs. The analysis is based on a Fourier-type technique applied to a semidiscrete-in-time form of the optimality condition, which enables a precise characterization of the convergence factor at the semidiscrete level. The behavior of the optimal transmission condition parameter is also analyzed in detail as the time discretization approaches zero.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jonas A. Actor, Xiaozhe Hu, Andy Huang, Scott A. Roberts, Nathaniel Trask
Summary: This article introduces a scientific machine learning framework that uses a partition of unity architecture to model physics through control volume analysis. The framework can extract reduced models from full field data while preserving the physics. It is applicable to manifolds in arbitrary dimension and has been demonstrated effective in specific problems.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Nozomi Magome, Naoki Morita, Shigeki Kaneko, Naoto Mitsume
Summary: This paper proposes a novel strategy called B-spline based SFEM to fundamentally solve the problems of the conventional SFEM. It uses different basis functions and cubic B-spline basis functions with C-2-continuity to improve the accuracy of numerical integration and avoid matrix singularity. Numerical results show that the proposed method is superior to conventional methods in terms of accuracy and convergence.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Timothy R. Law, Philip T. Barton
Summary: This paper presents a practical cell-centred volume-of-fluid method for simulating compressible solid-fluid problems within a pure Eulerian setting. The method incorporates a mixed-cell update to maintain sharp interfaces, and can be easily extended to include other coupled physics. Various challenging test problems are used to validate the method, and its robustness and application in a multi-physics context are demonstrated.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Xing Ji, Fengxiang Zhao, Wei Shyy, Kun Xu
Summary: This paper presents the development of a third-order compact gas-kinetic scheme for compressible Euler and Navier-Stokes solutions, constructed particularly for an unstructured tetrahedral mesh. The scheme demonstrates robustness in high-speed flow computation and exhibits excellent adaptability to meshes with complex geometrical configurations.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Alsadig Ali, Abdullah Al-Mamun, Felipe Pereira, Arunasalam Rahunanthan
Summary: This paper presents a novel Bayesian statistical framework for the characterization of natural subsurface formations, and introduces the concept of multiscale sampling to localize the search in the stochastic space. The results show that the proposed framework performs well in solving inverse problems related to porous media flows.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jacob Rains, Yi Wang, Alec House, Andrew L. Kaminsky, Nathan A. Tison, Vamshi M. Korivi
Summary: This paper presents a novel method called constrained optimized DMD with Control (cOptDMDc), which extends the optimized DMD method to systems with exogenous inputs and can enforce the stability of the resulting reduced order model (ROM). The proposed method optimally places eigenvalues within the stable region, thus mitigating spurious eigenvalue issues. Comparative studies show that cOptDMDc achieves high accuracy and robustness.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Andrea La Spina, Jacob Fish
Summary: This work introduces a hybridizable discontinuous Galerkin formulation for simulating ideal plasmas. The proposed method couples the fluid and electromagnetic subproblems monolithically based on source and employs a fully implicit time integration scheme. The approach also utilizes a projection-based divergence correction method to enforce the Gauss laws in challenging scenarios. Numerical examples demonstrate the high-order accuracy, efficiency, and robustness of the proposed formulation.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Junhong Yue, Peijun Li
Summary: This paper proposes two numerical methods (IP-FEM and BP-FEM) to study the flexural wave scattering problem of an arbitrary-shaped cavity on an infinite thin plate. These methods successfully decompose the fourth-order plate wave equation into the Helmholtz and modified Helmholtz equations with coupled conditions on the cavity boundary, providing an effective solution to this challenging problem.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
William Anderson, Mohammad Farazmand
Summary: We develop fast and scalable methods, called RONS, for computing reduced-order nonlinear solutions. These methods have been proven to be highly effective in tackling challenging problems, but become computationally prohibitive as the number of parameters grows. To address this issue, three separate methods are proposed and their efficacy is demonstrated through examples. The application of RONS to neural networks is also discussed.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Marco Caliari, Fabio Cassini
Summary: In this paper, a second order exponential scheme for stiff evolutionary advection-diffusion-reaction equations is proposed. The scheme is based on a directional splitting approach and uses computation of small sized exponential-like functions and tensor-matrix products for efficient implementation. Numerical examples demonstrate the advantage of the proposed approach over state-of-the-art techniques.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Sebastiano Boscarino, Seung Yeon Cho, Giovanni Russo
Summary: This work proposes a high order conservative semi-Lagrangian method for the inhomogeneous Boltzmann equation of rarefied gas dynamics. The method combines a semi-Lagrangian scheme for the convection term, a fast spectral method for computation of the collision operator, and a high order conservative reconstruction and a weighted optimization technique to preserve conservative quantities. Numerical tests demonstrate the accuracy and efficiency of the proposed method.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jialei Li, Xiaodong Liu, Qingxiang Shi
Summary: This study shows that the number, centers, scattering strengths, inner and outer diameters of spherical shell-structured sources can be uniquely determined from the far field patterns. A numerical scheme is proposed for reconstructing the spherical shell-structured sources, which includes a migration series method for locating the centers and an iterative method for computing the inner and outer diameters without computing derivatives.
JOURNAL OF COMPUTATIONAL PHYSICS
(2024)
