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Journal articles on the topic '0D-1D simulation'

Author: Grafiati
Published: 14 March 2023
Last updated: 31 July 2025

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1

Simakov, Sergey S. "Spatially averaged haemodynamic models for different parts of cardiovascular system." Russian Journal of Numerical Analysis and Mathematical Modelling 35, no. 5 (2020): 285–94. http://dx.doi.org/10.1515/rnam-2020-0024.

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AbstractThis paper revisits the usage of spatially averaged haemodynamic models such as non-stationary 1D/0D in space and stationary 0D in space models. Conditions of equivalence between different 1D model formulations are considered. The impact of circular and elliptic shapes of the tube cross-section on the friction term and the tube law is analyzed. Finally, the relationship between 0D lumped and 1D models is revealed.
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Alastruey, Jordi, Nan Xiao, Henry Fok, Tobias Schaeffter, and C. Alberto Figueroa. "On the impact of modelling assumptions in multi-scale, subject-specific models of aortic haemodynamics." Journal of The Royal Society Interface 13, no. 119 (2016): 20160073. http://dx.doi.org/10.1098/rsif.2016.0073.

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Simulation of haemodynamics has become increasingly popular within the research community. Irrespective of the modelling approach (zero-dimensional (0D), one-dimensional (1D) or three-dimensional (3D)), in vivo measurements are required to personalize the arterial geometry, material properties and boundary conditions of the computational model. Limitations in in vivo data acquisition often result in insufficient information to determine all model parameters and, hence, arbitrary modelling assumptions. Our goal was to minimize and understand the impact of modelling assumptions on the simulated
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Zou, Wangzhi, Zhaoyun Song, Baotong Wang, Mengyang Wen, and Xinqian Zheng. "An efficient multi-fidelity simulation approach for performance prediction of adaptive cycle engines." Journal of the Global Power and Propulsion Society 8 (August 29, 2024): 310–22. http://dx.doi.org/10.33737/jgpps/191167.

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Adaptive cycle engine (ACE) with multi-stream, modulated bypass ratio, and high-thrust/high-efficiency mode provides the capability of multiple mission adaptation for the next-generation aviation propulsion system. The low-fidelity zero-dimensional (0D) performance simulation method is commonly adopted in conventional engines such as turbofan and turbojet. However, it is hard to accommodate well to ACE with complex variable geometry schemes and strong interaction between components. This paper presents an efficient multi-fidelity simulation approach, often referred to as component zooming, for
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Naidis, G. V., and N. Yu Babaeva. "Low-pressure CO2 discharges: 1D modeling." Physics of Plasmas 30, no. 1 (2023): 013506. http://dx.doi.org/10.1063/5.0130672.

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A 1D model of glow low-pressure CO2 discharges is developed. In the framework of this model, simulation of stationary and repetitively pulsed discharges at pressure ranging from 0.5 to 5 Torr and current from 10 to 50 mA is performed. The obtained plasma characteristics are compared with the available experimental results and with the data evaluated based on the approximate 0D approach. The results of 0D and 1D calculations agree for most of plasma parameters, except for the molar fraction of CO molecules produced at CO2 dissociation by electron impact. Agreement between the measured and calcu
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Echeverribar, Isabel, Pablo Vallés, Juan Mairal, and Pilar García-Navarro. "Efficient Reservoir Modelling for Flood Regulation in the Ebro River (Spain)." Water 13, no. 22 (2021): 3160. http://dx.doi.org/10.3390/w13223160.

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The vast majority of reservoirs, although built for irrigation and water supply purposes, are also used as regulation tools during floods in river basins. Thus, the selection of the most suitable model when facing the simulation of a flood wave in a combination of river reach and reservoir is not direct and frequently some analysis of the proper system of equations and the number of solved flow velocity components is needed. In this work, a stretch of the Ebro River (Spain), which is the biggest river in Spain, is simulated solving the Shallow Water Equations (SWE). The simulation model covers
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Chen, Yan, Masaharu Kobayashi, Changyoung Yuhn, and Marie Oshima. "Development of a 3D Vascular Network Visualization Platform for One-Dimensional Hemodynamic Simulation." Bioengineering 11, no. 4 (2024): 313. http://dx.doi.org/10.3390/bioengineering11040313.

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Recent advancements in computational performance and medical simulation technology have made significant strides, particularly in predictive diagnosis. This study focuses on the blood flow simulation reduced-order models, which provide swift and cost-effective solutions for complex vascular systems, positioning them as practical alternatives to 3D simulations in resource-limited medical settings. The paper introduces a visualization platform for patient-specific and image-based 1D–0D simulations. This platform covers the entire workflow, from modeling to dynamic 3D visualization of simulation
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Dilber, Viktor, Momir Sjerić, Rudolf Tomić, Josip Krajnović, Sara Ugrinić, and Darko Kozarac. "Optimization of Pre-Chamber Geometry and Operating Parameters in a Turbulent Jet Ignition Engine." Energies 15, no. 13 (2022): 4758. http://dx.doi.org/10.3390/en15134758.

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A turbulent jet ignition engine enables operation with lean mixtures, decreasing nitrogen oxide (NOX) emissions up to 92%, while the engine efficiency can be increased compared to conventional spark-ignition engines. The geometry of the pre-chamber and engine operating parameters play the most important role in the performance of turbulent jet ignition engines and, therefore, must be optimized. The initial experimental and 3D CFD results of a single-cylinder engine fueled by gasoline were used for the calibration of a 0D/1D simulation model. The 0D/1D simulation model was upgraded to capture t
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8

YUHN, Changyoung, and Marie OSHIMA. "Effects of reducing 1D network complexity in a 1D–0D simulation of cerebral circulation." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2019.32 (2019): 1A22. http://dx.doi.org/10.1299/jsmebio.2019.32.1a22.

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9

Kovács, László, and Szilárd Szabó. "Test validated 0D/1D engine model of a swinging valve internal combustion engine." Multidiszciplináris tudományok 11, no. 4 (2021): 266–77. http://dx.doi.org/10.35925/j.multi.2021.4.31.

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In the quest for reaching ever higher power density of IC engines a much simpler solution has been investigated that allows vehicles to reach a comparable power level with cars equipped with turbo charged engines. The new Swinging Valve (SwV) arrangement enables the unhindered gas exchange process through an engine. In this experiment a flow bench was used to examine a normal poppet valve cylinder head and a cylinder head constructed for the same engine but with Swinging Valves. The flow parameters of the original cylinder head were obtained then the SwV head was investigated in the same way.
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10

Tretyakova, Rufina M., Gennady I. Lobov, and Gennady A. Bocharov. "Modelling lymph flow in the lymphatic system: from 0D to 1D spatial resolution." Mathematical Modelling of Natural Phenomena 13, no. 5 (2018): 45. http://dx.doi.org/10.1051/mmnp/2018044.

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In this study, we formulated a core mathematical model for describing the one-dimensional lymph flow in lymphatic vessels and branching network of lymphatic vessels. The 1D model was numerically implemented using the 1D haemodynamic modeling tools developed in T.M. Gamilov et al. and S. Simakov et al. [T.M. Gamilov et al., Transl. Med. 6 (2013) 5–13 and S. Simakov et al., Russian J. Numer. Anal. Math. Model. 28 (2013) 485–504]. The formulated model was calibrated using published data on lymph flow dynamics and other modelling studies of lymph flows. The comparison of 0D and 1D formulations of
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11

Katsoudas, Spyridon, Stavros Malatos, Anastasios Raptis, Miltiadis Matsagkas, Athanasios Giannoukas, and Michalis Xenos. "Blood Flow Simulation in Bifurcating Arteries: A Multiscale Approach After Fenestrated and Branched Endovascular Aneurysm Repair." Mathematics 13, no. 9 (2025): 1362. https://doi.org/10.3390/math13091362.

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Pathophysiological conditions in arteries, such as stenosis or aneurysms, have a great impact on blood flow dynamics enforcing the numerical study of such pathologies. Computational fluid dynamics (CFD) could provide the means for the calculation and interpretation of pressure and velocity fields, wall stresses, and important biomedical factors in such pathologies. Additionally, most of these pathological conditions are connected with geometric vessel changes. In this study, the numerical solution of the 2D flow in a branching artery and a multiscale model of 3D flow are presented utilizing CF
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12

Dazzi, Susanna, Riccardo Verbeni, Paolo Mignosa, and Renato Vacondio. "Simulation of Flood-Control Reservoirs: Comparing Fully 2D and 0D–1D Models." Hydrology 11, no. 11 (2024): 180. http://dx.doi.org/10.3390/hydrology11110180.

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Flood-control reservoirs are often used as a structural measure to mitigate fluvial floods, and numerical models are a fundamental tool for assessing their effectiveness. This work aims to analyze the suitability of fully 2D shallow-water models to simulate these systems by adopting internal boundary conditions to describe hydraulic structures (i.e., dams) and by using a parallelized code to reduce the computational burden. The 2D results are also compared with the more established approach of coupling a 1D model for the river and a 0D model for the reservoir. Two test cases, including an in-s
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13

Pappa, Alessio, and Ward De Paepe. "Humidification Towards Flashback Prevention in a Classical Micro Gas Turbine: Thermodynamic Performance Assessment." E3S Web of Conferences 414 (2023): 03010. http://dx.doi.org/10.1051/e3sconf/202341403010.

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Combustion air humidification has proven to be effective to stabilize hydrogen combustion and to avoid flashback apparition in a typical micro Gas Turbine (mGT). However, both the fuel alteration and combustion air dilution will impact the cycle performance. A complete characterization of this thermodynamic impact is essential to ensure that the mGTs become cleaner, and fully flexible to fit with the expectation of future small-scale decentralized power production. Therefore, the objective of this work is twofold: the determination of the necessary dilution for combustion stabilization, depend
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14

Lebedev, Yuri A. "Microwave Discharges in Liquid Hydrocarbons: Physical and Chemical Characterization." Polymers 13, no. 11 (2021): 1678. http://dx.doi.org/10.3390/polym13111678.

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Microwave discharges in dielectric liquids are a relatively new area of plasma physics and plasma application. This review cumulates results on microwave discharges in wide classes of liquid hydrocarbons (alkanes, cyclic and aromatic hydrocarbons). Methods of microwave plasma generation, composition of gas products and characteristics of solid carbonaceous products are described. Physical and chemical characteristics of discharge are analyzed on the basis of plasma diagnostics and 0D, 1D and 2D simulation.
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15

Najafi, M., and Z. Benjelloun-Dabaghi. "A New Modelica Model and Scicos Simulation for 0D/1D Nonlinear Complex Systems." Oil & Gas Science and Technology - Revue de l'IFP 63, no. 6 (2008): 723–36. http://dx.doi.org/10.2516/ogst:2008042.

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16

Zhang, Hao, Naoya Fujiwara, Masaharu Kobayashi, et al. "Development of patient-specific 1D-0D simulation based on MRI and SPECT data." Journal of Biorheology 32, no. 1 (2018): 2–8. http://dx.doi.org/10.17106/jbr.32.2.

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17

Matsuura, Sohei, Toshio Takayama, Changyoung Yuhn, et al. "Indication of Selective Shunting During Carotid Endarterectomy: 1D–0D Hemodynamic Simulation of Cerebral Perfusion." Journal of Vascular Surgery 72, no. 1 (2020): e64. http://dx.doi.org/10.1016/j.jvs.2020.04.118.

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18

Marinoni, Andrea, Matteo Tamborski, Tarcisio Cerri, et al. "0D/1D Thermo-Fluid Dynamic Modeling Tools for the Simulation of Driving Cycles and the Optimization of IC Engine Performances and Emissions." Applied Sciences 11, no. 17 (2021): 8125. http://dx.doi.org/10.3390/app11178125.

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The prediction of internal combustion engine performance and emissions in real driving conditions is getting more and more important due to the upcoming stricter regulations. This work aims at introducing and validating a new transient simulation methodology of an ICE coupled to a hybrid architecture vehicle, getting closer to real-time calculations. A one-dimensional computational fluid dynamic software has been used and suitably coupled to a vehicle dynamics model in a user function framework integrated within a Simulink® environment. A six-cylinder diesel engine has been modeled by means of
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19

El Khatib, N., O. Kafi, A. Sequeira, S. Simakov, Yu Vassilevski, and V. Volpert. "Mathematical modelling of atherosclerosis." Mathematical Modelling of Natural Phenomena 14, no. 6 (2019): 603. http://dx.doi.org/10.1051/mmnp/2019050.

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The review presents the state of the art in the atherosclerosis modelling. It begins with the biological introduction describing the mechanisms of chronic inflammation of artery walls characterizing the development of atherosclerosis. In particular, we present in more detail models describing this chronic inflammation as a reaction-diffusion wave with regimes of propagation depending on the level of cholesterol (LDL) and models of rolling monocytes initializing the inflammation. Further development of this disease results in the formation of atherosclerotic plaque, vessel remodelling and possi
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20

Korte, Jana, Ehlar Sophie Klopp, and Philipp Berg. "Multi-Dimensional Modeling of Cerebral Hemodynamics: A Systematic Review." Bioengineering 11, no. 1 (2024): 72. http://dx.doi.org/10.3390/bioengineering11010072.

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The Circle of Willis (CoW) describes the arterial system in the human brain enabling the neurovascular blood supply. Neurovascular diseases like intracranial aneurysms (IAs) can occur within the CoW and carry the risk of rupture, which can lead to subarachnoid hemorrhage. The assessment of hemodynamic information in these pathologies is crucial for their understanding regarding detection, diagnosis and treatment. Multi-dimensional in silico approaches exist to evaluate these hemodynamics based on patient-specific input data. The approaches comprise low-scale (zero-dimensional, one-dimensional)
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21

Wang, Yan, Mingguang Yao, Xing Hua, et al. "Structural Evolution of D 5h (1)-C90 under High Pressure: A Mediate Allotrope of Nanocarbon from Zero-Dimensional Fullerene to One-Dimensional Nanotube." Chinese Physics Letters 39, no. 5 (2022): 056101. http://dx.doi.org/10.1088/0256-307x/39/5/056101.

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The hybridization of fullerene and nanotube structures in newly isolated C90 with the D 5h symmetric group (D 5h (1)-C90) provides an ideal model as a mediating allotrope of nanocarbon from zero-dimensional (0D) fullerene to one-dimensional nanotube. Raman and infrared spectroscopy combined with classical molecular dynamics simulation were used to investigate the structural evolution of D 5h (1)-C90 at ambient and high pressure up to 35.1 GPa. Interestingly, the high-pressure transformations of D 5h (1)-C90 exhibit the features of both fullerene and nanotube. At around 2.5 GPa, the D 5h (1)-C9
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22

Choi, Heewon, Nam-gyu Lim, Seong Jun Lee, and Jungsoo Park. "Feasibility Study for Sustainable Use of Lithium-Ion Batteries Considering Different Positive Electrode Active Materials under Various Driving Cycles by Using Cell to Electric Vehicle (EV) Simulation." Sustainability 12, no. 22 (2020): 9764. http://dx.doi.org/10.3390/su12229764.

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Electric vehicles have been issued to achieve sustainable mobility. Main factors to sustainable electric vehicle (EV) are that lithium-ion battery (LIB) has to maintain lower cost, lighter weight, SOC (state of charge), thermal stability, and driving ranges. In this study, nickel-cobalt-manganese (NCM), lithium iron phosphate (LFP), and lithium manganese oxide (LMO), which are used as representative positive electrode materials, were applied to battery cells. Then, the battery characteristics at the system level, according to the application of different positive electrode materials, were comp
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23

Frerichs, Jelto, and Peter Eilts. "A New Combustion Model for Medium Speed Dual-Fuel Engines in the Course of 0D/1D Simulation." Methane 1, no. 3 (2022): 158–76. http://dx.doi.org/10.3390/methane1030013.

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In this paper, a predictive combustion model is developed and implemented in GT-Power. The model consists of a detailed physically/chemically based ignition delay model, including a 1D spray model. The spray model results at the start of combustion are used to initialize the combustion model. The spray zone and the homogenous natural gas/air mixture are burned with different combustion models, to account for the effect of the inhomogeneous fuel distribution. NOx-emissions are modelled using a standard Extended Zeldovich Mechanism, and for the HC-emissions, two flame quenching models are includ
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24

ISHIGAMI, Yuta, and Marie OSHIMA. "1G24 Blood flow simulation for coupling of 3D fluid-structure interaction and 1D-0D peripheral vessel model." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2014.26 (2014): 225–26. http://dx.doi.org/10.1299/jsmebio.2014.26.225.

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25

Irimescu, Adrian, Bianca Maria Vaglieco, Simona Silvia Merola, Vasco Zollo, and Raffaele De Marinis. "Conversion of a Small-Size Passenger Car to Hydrogen Fueling: 0D/1D Simulation of EGR and Related Flow Limitations." Applied Sciences 14, no. 2 (2024): 844. http://dx.doi.org/10.3390/app14020844.

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Hydrogen is seen as a prime choice for complete replacement of gasoline so as to achieve zero-emissions energy and mobility. Combining the use of this alternative fuel with a circular economy approach for giving new life to the existing fleet of passenger cars ensures further benefits in terms of cost competitiveness. Transforming spark ignition (SI) engines to H2 power requires relatively minor changes and limited added components. Within this framework, the conversion of a small-size passenger car to hydrogen fueling was evaluated based on 0D/1D simulation. One of the methods to improve effi
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26

Montenegro, G., A. Della Torre, A. Onorati, and R. Fairbrother. "A Nonlinear Quasi-3D Approach for the Modeling of Mufflers with Perforated Elements and Sound-Absorbing Material." Advances in Acoustics and Vibration 2013 (January 14, 2013): 1–10. http://dx.doi.org/10.1155/2013/546120.

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Increasing demands on the capabilities of engine thermo-fluid dynamic simulation and the ability to accurately predict both performance and acoustics have led to the development of several approaches, ranging from fully 3D to simplified 1D models. The quasi-3D approach is proposed as a compromise between the time-demanding 3D CFD analysis and the fast 1D approach; it allows to model the acoustics of intake and exhaust system components, used in internal combustion engines, resorting to a 3D network of 0D cells. Due to its 3D nature, the model predicts high-order modes, improving the accuracy a
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Choi, Seung-Mok, Kyoung-Doug Min, and Ki-Doo Kim. "Development of 0D Multizone Combustion Model and Its Coupling with 1D Cycle-Simulation Model for Medium-Sized Direct-Injection Diesel Engine." Transactions of the Korean Society of Mechanical Engineers B 34, no. 6 (2010): 615–22. http://dx.doi.org/10.3795/ksme-b.2010.34.6.615.

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28

Matsuura, Sohei, Toshio Takayama, Changyoung Yuhn, et al. "Carotid Stump Pressure and Contralateral Internal Carotid Stenosis Ratio During Carotid Endarterectomies: 1D-0D Hemodynamic Simulation of Cerebral Perfusion." Annals of Vascular Diseases 14, no. 1 (2021): 39–45. http://dx.doi.org/10.3400/avd.oa.20-00166.

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29

Wei, Jie, Wangzhi Zou, Zhaoyun Song, Baotong Wang, Jiaan Li, and Xinqian Zheng. "A New Integrated Model for Simulating Adaptive Cycle Engine Performance Considering Variations in Tip Clearance." Processes 11, no. 9 (2023): 2597. http://dx.doi.org/10.3390/pr11092597.

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The low-fidelity simulation method cannot meet the requirements for predicting the performance of an adaptive cycle engine (ACE), especially when considering tip clearance variations in the compression and expansion systems. The tip clearances of the components of an ACE, such as the adaptive fan and turbine, vary drastically under different operating conditions. Though the tip clearance significantly impacts the engine’s performance, including its thrust and fuel consumption, variations in tip clearance are not considered in traditional ACE simulation models. This paper developed a new integr
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Irimescu, A., B. M. Vaglieco, S. S. Merola, V. Zollo, and R. De Marinis. "Conversion of a small size passenger car to hydrogen fueling: simulation of full load performance." IOP Conference Series: Materials Science and Engineering 1311, no. 1 (2024): 012004. http://dx.doi.org/10.1088/1757-899x/1311/1/012004.

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Abstract Hydrogen offers a valid choice when considering zero emissions transport. This alternative fuel is well suited for spark ignition (SI) engines and it can be implemented with relatively minor changes in terms of added components. Initial evaluations of feasibility with respect to available space for the fuel tank revealed that it is possible to convert a small size passenger car to hydrogen fueling and maintain a range comparable to the fully electric alternative. Peak power assessment showed that additional boosting was required compared to gasoline operation, close to the limit of co
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Zhao, Chenxi, Zhou Li, Tianjiao Fan, Chong Xiao, and Yi Xie. "Defects Engineering with Multiple Dimensions in Thermoelectric Materials." Research 2020 (May 22, 2020): 1–23. http://dx.doi.org/10.34133/2020/9652749.

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Going through decades of development, great progress in both theory and experiment has been achieved in thermoelectric materials. With the growing enhancement in thermoelectric performance, it is also companied with the complexation of defects induced in the materials. 0D point defects, 1D linear defects, 2D planar defects, and 3D bulk defects have all been induced in thermoelectric materials for the optimization of thermoelectric performance. Considering the distinct characteristics of each type of defects, in-depth understanding of their roles in the thermoelectric transport process is of vi
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Zhang, Yuanpeng, Marshall McDonnell, Wei Liu, and Matthew G. Tucker. "Reverse Monte Carlo modeling for low-dimensional systems." Journal of Applied Crystallography 52, no. 5 (2019): 1035–42. http://dx.doi.org/10.1107/s160057671901080x.

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Reverse Monte Carlo (RMC) is one of the commonly used approaches for modeling total scattering data. However, to extend the capability of the RMC method for refining the structure of nanomaterials, the dimensionality and finite size need to be considered when calculating the pair distribution function (PDF). To achieve this, the simulation box must be set up to remove the periodic boundary condition in one, two or three of the dimensions. This then requires a correction to be applied for the difference in number density between the real system and the simulation box. In certain circumstances a
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Wurzenberger, Johann C., Roland Wanker, Ales Schuemie, Reinhard Tatschl, and Johann Krammer. "OS-D1: A Simulation Framework for 0D Engine Combustion and Pollutant Formation Combined with 1D Exhaust Gas Aftertreatment : Control of Gasoline Engine Emissions During Drive-Cycle(OS-D Advanced engine simulation (prediction of performance & emissions, transient simulation),Organized Session Papers)." Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2008.7 (2008): 105–14. http://dx.doi.org/10.1299/jmsesdm.2008.7.105.

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Champagne, Aurélie, Samuel Dechamps, Simon M. M. Dubois, Aurélien Lherbier, Viet-Hung Nguyen, and Jean-Christophe Charlier. "Computational Atomistic Modeling in Carbon Flatland and Other 2D Nanomaterials." Applied Sciences 10, no. 5 (2020): 1724. http://dx.doi.org/10.3390/app10051724.

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As in many countries, the rise of nanosciences in Belgium has been triggered in the eighties in the one hand, by the development of scanning tunneling and atomic force microscopes offering an unprecedented possibility to visualize and manipulate the atoms, and in the other hand, by the synthesis of nano-objects in particular carbon nanostructures such as fullerene and nanotubes. Concomitantly, the increasing calculating power and the emergence of computing facilities together with the development of DFT-based ab initio softwares have brought to nanosciences field powerful simulation tools to a
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Tadros, Mina, Manuel Ventura, and C. Guedes Soares. "Optimization of the Performance of Marine Diesel Engines to Minimize the Formation of SOx Emissions." Journal of Marine Science and Application 19, no. 3 (2020): 473–84. http://dx.doi.org/10.1007/s11804-020-00156-0.

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Abstract Optimization procedures are required to minimize the amount of fuel consumption and exhaust emissions from marine engines. This study discusses the procedures to optimize the performance of any marine engine implemented in a 0D/1D numerical model in order to achieve lower values of exhaust emissions. From that point, an extension of previous simulation researches is presented to calculate the amount of SOx emissions from two marine diesel engines along their load diagrams based on the percentage of sulfur in the marine fuel used. The variations of SOx emissions are computed in g/kW·h
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Zhang, Hao, Naoya Fujiwara, Masaharu Kobayashi, et al. "Development of a Numerical Method for Patient-Specific Cerebral Circulation Using 1D–0D Simulation of the Entire Cardiovascular System with SPECT Data." Annals of Biomedical Engineering 44, no. 8 (2015): 2351–63. http://dx.doi.org/10.1007/s10439-015-1544-8.

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Zhu, Yichuan, Zenon Medina-Cetina, and Alma Rosa Pineda-Contreras. "Spatio-Temporal Statistical Characterization of Boundary Kinematic Phenomena of Triaxial Sand Specimens." Materials 15, no. 6 (2022): 2189. http://dx.doi.org/10.3390/ma15062189.

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This paper follows up on a reference paper that inspired MDPI’s Topic “Stochastic Geomechanics: From Experimentation to Forward Modeling”, where global and local deformation effects on sand specimens are fully described from high resolution boundary displacement fields, and supported by its experimental database, which is open to the scientific community for further study. This paper introduces the use of spatio-temporal statistics from a subset of such an experimental database to characterize the specimens’ spatio-temporal displacement fields, populated by repeating a set of triaxial compress
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Wanker, Roland J., Johann C. Wurzenberger, and Henrik A. Schuemie. "Three-Way Catalyst Light-off During the NEDC Test Cycle: Fully Coupled 0D/1D Simulation of Gasoline Combustion, Pollutant Formation and Aftertreatment Systems." SAE International Journal of Fuels and Lubricants 1, no. 1 (2008): 1373–86. http://dx.doi.org/10.4271/2008-01-1755.

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Jeong, Soo-Jin. "CFD Simulation of Pre-Chamber Spark-Ignition Engines—A Perspective Review." Energies 17, no. 18 (2024): 4696. http://dx.doi.org/10.3390/en17184696.

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The growing demand to reduce emissions of pollutants and CO2 from internal combustion engines has led to a critical need for the development of ultra-lean burn engines that can maintain combustion stability while mitigating the risk of knock. One of the most effective techniques is the pre-chamber spark-ignition (PCSI) system, where the primary combustion within the cylinder is initiated by high-energy reactive gas jets generated by pilot combustion in the pre-chamber. Due to the complex physical and chemical processes involved in PCSI systems, performing 3D CFD simulations is crucial for in-d
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Bianchi, Fiammetta Rita, Barbara Bosio, Arianna Baldinelli, and Linda Barelli. "Optimization of a Reference Kinetic Model for Solid Oxide Fuel Cells." Catalysts 10, no. 1 (2020): 104. http://dx.doi.org/10.3390/catal10010104.

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Solid oxide fuel cells (SOFCs) stand out among other fuel cell types because of their specific characteristics. The high operating temperature permits to reach optimal conductivity and favours kinetics without requiring noble metal catalysts. The SOFC behaviour analysis is fundamental to optimise operating conditions and to obtain the best performance. For this purpose, specific models are studied to investigate the electrochemical kinetics, which is the most critical aspect in the simulation. This is closely linked to cell materials and structure, as well as to operating conditions (feed comp
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Di Lorenzo, Giuseppe, Emma Frosina, Luigi De Petrillo, et al. "Design and Development of Hybrid-Electric Propulsion Model for Aeronautics." MATEC Web of Conferences 304 (2019): 03012. http://dx.doi.org/10.1051/matecconf/201930403012.

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Nowadays, worldwide environmental issue, associated to reduction of pollutant and greenhouse emissions are gaining considerable attention. Aviation sector contribution to the whole CO2 released accounts to around 2%, but it is expected to grow in the next future due to increase of demand. Probably, combustion engine design and fuel efficiency have already reached their optimum technology level and only a breakthrough as hybrid-electric propulsion could be able to satisfy the new international more demanding requirements. However, an improvement of the technology readiness level of hybrid-elect
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42

Irimescu, Adrian, Bianca Maria Vaglieco, Simona Silvia Merola, Vasco Zollo, and Raffaele De Marinis. "Conversion of a Small-Size Passenger Car to Hydrogen Fueling: Evaluating the Risk of Backfire and the Correlation to Fuel System Requirements through 0D/1D Simulation." Energies 16, no. 10 (2023): 4201. http://dx.doi.org/10.3390/en16104201.

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Hydrogen is an effective route for achieving zero carbon dioxide emissions, with a contained cost compared to electric powertrains. When considering the conversion of spark ignition (SI) engines to H2 fueling, relatively minor changes are required in terms of added components. This study looks at the possibility of converting a small-size passenger car powered by a turbocharged SI unit. The initial evaluation of range and peak power showed that overall, the concept is feasible and directly comparable to the electric version of the vehicle in terms of powertrain performance. Injection phasing e
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43

Irimescu, Adrian, Bianca Maria Vaglieco, Simona Silvia Merola, Vasco Zollo, and Raffaele De Marinis. "Conversion of a Small-Size Passenger Car to Hydrogen Fueling: Simulation of CCV and Evaluation of Cylinder Imbalance." Machines 11, no. 2 (2023): 135. http://dx.doi.org/10.3390/machines11020135.

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In the efforts to achieve zero-emission transportation, hydrogen offers a valid choice as a complete replacement of gasoline. Adapting spark ignition (SI) engines to this alternative fuel can be implemented with relatively minor changes and limited investment in added components. The conversion of a small-size passenger car to hydrogen fueling was evaluated initially from the perspective of achievable range and peak power. Overall, the concept was found to be feasible and comparable to the fully electric version of the vehicle. Cylinder imbalance was found to be one of the possible issues comp
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Shen, Haosheng, Fumiao Yang, Dingyu Jiang, et al. "Parametric Investigation on the Influence of Turbocharger Performance Decay on the Performance and Emission Characteristics of a Marine Large Two-Stroke Dual Fuel Engine." Journal of Marine Science and Engineering 12, no. 8 (2024): 1298. http://dx.doi.org/10.3390/jmse12081298.

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Identifying and analyzing the engine performance and emission characteristics under the condition of performance decay is of significant reference value for fault diagnosis, condition-based maintenance, and health status monitoring. However, there is a lack of relevant research on the currently popular marine large two-stroke dual fuel (DF) engines. To fill the research gap, a detailed zero-/one-dimensional (0D/1D) model of a marine two-stroke DF engine employing the low-pressure gas concept is first established in GT-Power (Version 2020) and validated by comparing the simulation and measured
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Liu, Cong, Baiqing Li, Zhiqiang Wei, Zongwei Zhang, Zezhong Shan, and Yu Wang. "Effects of Wake Separation on Aerodynamic Interference Between Rotors in Urban Low-Altitude UAV Formation Flight." Aerospace 11, no. 11 (2024): 865. http://dx.doi.org/10.3390/aerospace11110865.

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In recent years, unmanned aerial vehicle (UAV) formation flight has become an effective strategy for urban air mobility (UAM). However, close rotor separation during formation flight leads to complex aerodynamic interference between rotors, significantly affecting UAV flight performance and operational safety. This study systematically examines the effects of axial and lateral rotor separation on the rotor’s thrust performance through wind tunnel experiments. The tests simulate horizontal, vertical, and hovering states by generating relative airflow in the wind tunnel, focusing primarily on th
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Zheng, Yunxin, Zhiping Hu, Xiang Ren, Rui Wang, Enxiang Zhang, and Zhao Long. "Effects of Partial Supporting Pile Removal from Deep Foundation Pits by Shallow Excavation Method in Loess Areas." Advances in Materials Science and Engineering 2021 (August 27, 2021): 1–13. http://dx.doi.org/10.1155/2021/9934113.

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Partial supporting piles removal from deep foundation pit may lead to large-scale foundation pit collapse, resulting in severe consequences. Various studies have investigated the underpinning technology of cutting abutment piles by combining field monitoring and numerical simulation, but there are few studies on cutting supporting piles of foundation pit by the shallow excavation method. Taking an actual deep and large foundation pit as an example, the finite element method (FEM) was adopted to study the surface settlement and the changing trend of the force and displacement of the supporting
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Moridis, George, Niwit Anantraksakul, and Thomas A. Blasingame. "The Partial Transformational Decomposition Method for a Hybrid Analytical/Numerical Solution of the 3D Gas-Flow Problem in a Hydraulically Fractured Ultralow-Permeability Reservoir." SPE Journal 26, no. 04 (2021): 2440–67. http://dx.doi.org/10.2118/199015-pa.

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Summary The analysis of gas production from fractured ultralow-permeability (ULP) reservoirs is most often accomplished using numerical simulation, which requires large 3D grids, many inputs, and typically long execution times. We propose a new hybrid analytical/numerical method that reduces the 3D equation of gas flow into either a simple ordinary-differential equation (ODE) in time or a 1D partial-differential equation (PDE) in space and time without compromising the strong nonlinearity of the gas-flow relation, thus vastly decreasing the size of the simulation problem and the execution time
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Tatarchuk, Tetiana. "Studying the Defects in Spinel Compounds: Discovery, Formation Mechanisms, Classification, and Influence on Catalytic Properties." Nanomaterials 14, no. 20 (2024): 1640. http://dx.doi.org/10.3390/nano14201640.

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Spinel ferrites demonstrate extensive applications in different areas, like electrodes for electrochemical devices, gas sensors, catalysts, and magnetic adsorbents for environmentally important processes. However, defects in the real spinel structure can change the many physical and chemical properties of spinel ferrites. Although the number of defects in a crystal spinel lattice is small, their influence on the vast majority of physical properties could be really decisive. This review provides an overview of the structural characteristics of spinel compounds (e.g., CoFe2O4, NiFe2O4, ZnFe2O4,
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Laroche, Emmanuel, David Donjat, and Philippe Reulet. "A Combined Experimental and Numerical Characterization of the Flowfield and Heat Transfer around a Multiperforated Plate with Compound Angle Injection." Energies 14, no. 3 (2021): 613. http://dx.doi.org/10.3390/en14030613.

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The aerodynamic and thermal behaviour of multiperforated zones in combustors is essential to the development of future combustion chambers. Detailed databases are therefore crucial for the validation of RANS/LES solvers, but also regarding the derivation of heat transfer correlations used in 0D/1D in-house codes developed by engine manufacturers. In the framework of FP7 EU SOPRANO Program, the test-rig used in a previous study is modified to be compatible with anisothermal conditions. The plate studied is a 12:1 model with a 90∘ compound angle injection. A heating system is used to generate a
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Giardiello, Giovanni, Alfredo Gimelli, Davide Riccio, and Giuseppe Zeppa. "An Automated Geometric Analysis and Characterization of an Oil-Lubricated Twin-Screw Compressor for Predictive Modeling." Journal of Physics: Conference Series 2893, no. 1 (2024): 012133. https://doi.org/10.1088/1742-6596/2893/1/012133.

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Abstract Compressor manufacturing companies are showing a growing interest in the development of validated compressor simulation models capable of predicting the behaviour of the machine if subjected to appropriate modifications. A validated predictive model of the entire compressor is useful for analysing the influence of the variation of some fundamental parameters, such as the variation of volumes or new inlet and outlet sections, on the behaviour of the machine. To create these models, geometric parameters such as the variation in volumes, the variation in inlet and outlet sections and the
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