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Journal articles on the topic 'Numerical modellng'

Author: Grafiati

Published: 7 July 2024

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1

Jaichuang, Atit, and Wirawan Chinviriyasit. "Numerical Modelling of Influenza Model with Diffusion." International Journal of Applied Physics and Mathematics 4, no. 1 (2014): 15–21. http://dx.doi.org/10.7763/ijapm.2014.v4.247.

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2

Makokha, Mary, Akira Kobayashi, and Shigeyasu Aoyama. "Numerical Modeling of Seawater Intrusion Management Measures." Journal of Rainwater Catchment Systems 14, no. 1 (2008): 17–24. http://dx.doi.org/10.7132/jrcsa.kj00004978338.

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3

Gerya, Taras V., David Fossati, Curdin Cantieni, and Diane Seward. "Dynamic effects of aseismic ridge subduction: numerical modelling." European Journal of Mineralogy 21, no. 3 (2009): 649–61. http://dx.doi.org/10.1127/0935-1221/2009/0021-1931.

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O. B. Silva, Augusto, Newton O. P. Júnior, and João A. V. Requena. "Numerical Modeling of a Composite Hollow Vierendeel-Truss." International Journal of Engineering and Technology 7, no. 3 (2015): 176–82. http://dx.doi.org/10.7763/ijet.2015.v7.788.

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ADETU, Alina-Elena, Cătălin ADETU, and Vasile NĂSTĂSESCU. "NUMERICAL MODELING OF ACOUSTIC WAVE PROPAGATION IN UNLIMITED SPACE." SCIENTIFIC RESEARCH AND EDUCATION IN THE AIR FORCE 21, no. 1 (2019): 80–87. http://dx.doi.org/10.19062/2247-3173.2019.21.12.

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6

Sosnowski, Marcin, and Jerzy Pisarek. "Analiza porównawcza wyników modelowania ewakuacji z wykorzystaniem różnych modeli numerycznych." Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa 2 (2014): 383–90. http://dx.doi.org/10.16926/tiib.2014.02.33.

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7

ITO, Yusuke, Toru KIZAKI, Naohiko SUGITA, and Mamoru MITSUISHI. "1206 Numerical Modeling of Picosecond Laser Drilling of Glass." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2015.8 (2015): _1206–1_—_1206–5_. http://dx.doi.org/10.1299/jsmelem.2015.8._1206-1_.

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Troyani, N., L. E. Montano, and O. M. Ayala. "Numerical modeling of thermal evolution in hot metal coiling." Revista de Metalurgia 41, Extra (2005): 488–92. http://dx.doi.org/10.3989/revmetalm.2005.v41.iextra.1082.

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9

Hebda, Kamil, Łukasz Habera, and Piotr Koślik. "Modelowanie numeryczne ładunków kumulacyjnych z wkładkami dzielonymi dwuczęściowymi." Nafta-Gaz 77, no. 4 (2021): 264–69. http://dx.doi.org/10.18668/ng.2021.04.06.

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The article was created on the grounds of numerical modelling of shaped charges with a focus on the unconventional shape of their liners. The standard shaped charge of the “deep penetrating” type is equipped with a conical liner made of copper. Three various geometries of shaped charges featuring unconventional shape have been modelled and compared with the classical model of a shaped charge. The shaped charges have been compared for maximum pressure during detonation, cumulative jet velocity, kinetic energy gained and length of cumulative jet after 22 µs. The purpose of modelling shaped charges, featuring unconventionally formed liners, was to check whether they are able to improve the perforation job parameters in oil and gas wells. Perforation of the borehole is a critical job, enabling the initiation of hydrocarbons production from a specific reservoir. The job consists in making series of channels perpendicular to the borehole axis, penetrating casing walls, the cement layer and the formation rock, in order to create a hydraulic link between the borehole and the reservoir of hydrocarbons. In the oil industry, the “deep penetrating” type shaped charges are designed in order to provide optimal length of the perforation channel, while maintaining its adequate perforating diameter. Nowadays, the most commonly deep-penetrating shaped charges used, are the axially-symmetric shaped charges with conical liners made of copper powders. The charges create a cumulative jet reaching a velocity of approx. 7000 m/sec and are able to penetrate up to 1 m of rock matrix in favourable conditions. The article describes the parameters of shaped charges, that have been obtained as a result of numerical modelling. In order to finally confirm the target penetrating ability by the modelled shaped charges, one should check their real physical models in fire-ground conditions.

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Chenari, B., S. S. Saadatian, and Almerindo D. Ferreira. "Numerical Modelling of Regular Waves Propagation and Breaking Using Waves2Foam." Journal of Clean Energy Technologies 3, no. 4 (2015): 276–81. http://dx.doi.org/10.7763/jocet.2015.v3.208.

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11

Barakhovskaia, E. V., I. V. Marchuk, and A. A. Fedorets. "Numerical modeling of thermocapillary deformations in locally heated liquid layer." Eurasian Journal of Mathematical and Computer Applications 5, no. 4 (2017): 4–13. http://dx.doi.org/10.32523/2306-3172-2017-5-4-4-13.

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12

Spiridonov, Alexander Olegovich, and Evgenii Mikhailovich Karchevskii. "Mathematical and numerical modeling of a drop-shaped microcavity laser." Computer Research and Modeling 11, no. 6 (2019): 1083–90. http://dx.doi.org/10.20537/2076-7633-2019-11-6-1083-1090.

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13

Russell, James K., Daniele Giordano, Donald B. Dingwell, and Kai-Uwe Hess. "Modelling the non-Arrhenian rheology of silicate melts: Numerical considerations." European Journal of Mineralogy 14, no. 2 (2002): 417–28. http://dx.doi.org/10.1127/0935-1221/2002/0014-0417.

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14

Fujihara, Masayuki. "Numerical Modelling of Flow in Fishways Using Shallow Water Equations." Journal of Rainwater Catchment Systems 14, no. 2 (2009): 97–98. http://dx.doi.org/10.7132/jrcsa.kj00005284815.

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15

Vala, Jiří. "Numerical approaches to the modelling of quasi-brittle crack propagation." Archivum Mathematicum, no. 3 (2023): 295–303. http://dx.doi.org/10.5817/am2023-3-295.

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Zuñiga-Cid, Ivan, Elvis Coutiño-Moreno, Quirino Estrada-Barbosa, and Gilberto Soto-Mendoza. "Modelado numérico de un elastómero (NBR) sometido a carga axial." Científica 26, no. 2 (2022): 1–15. http://dx.doi.org/10.46842/ipn.cien.v26n2a06.

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Actualmente el mercado de la manufactura de productos exige la mejora de los materiales con menor costo y una mayor calidad. El presente trabajo se realizó en una empresa de giro automotriz en México donde se manufacturan mangueras hidráulicas de alta presión, esta empresa busca innovar los materiales para poder competir contra otras marcas. Realizar productos con nuevos materiales implica realizar pruebas experimentales que implican tiempo y costo. Con este proyecto se buscó reducir el tiempo y el costo de las pruebas analizando el elastómero con herramientas CAD/CAE. El material base de las mangueras es un elastómero, por lo tanto, se realizó una metodología para obtener el modelo numérico con las propiedades hiperelásticas para conocer el comportamiento antes de llevarse a pruebas de construcción. El análisis de elementos finitos se realizó con un software especializado, que permitió el análisis de elastómeros con base a la metodología de la ASTM D412, referente a pruebas de hules vulcanizados sometidos a presión, estableciendo la geometría y las condiciones fronteras. Con el estudio se encontró que modelo constitutivo con mayor aproximación al comportamiento hiperelástico para hules vulcanizados fue el modelo de Marlow.

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17

侯政伯, 侯政伯, та 廖硃岑廖硃岑. "直交集成板斷面性質之數值模擬分析". 建築學報 125, № 125 (2023): 1–14. http://dx.doi.org/10.53106/101632122023090125001.

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直交集成板(Cross-Laminated Timber)，以下簡稱CLT，質量輕約為鋼筋混凝土重量之0.2倍，具有經濟及自然材料循環再生的特性。CLT板材使用在鋼結構高層建築樓板上因現場組裝便利、迅速，更因為自重輕，可以降低各樓層的重量因而減少設計地震力，使梁柱結構尺寸斷面變小，可提升樓層高度之淨高及增加平面使用之面積。世界各地因為地理環境的不同，各國皆有專屬的特有樹種，以日本為例，將CLT產品性能最佳及經濟化，發展出外層為扁柏內層為杉木之CLT產品。為提供結構設計者一種迅速、可靠的應力分析方式，本次研究以驗證之方式探討CLT案例試驗資料與數值模擬分析結果進行兩者斷面性質比較，藉此結果提出當CLT其集成元具不同斷面組合時，可以運用模擬方式求得彎曲彈性係數E，並在不同支承邊界條件、不同載重形式時，提供精準之斷面應力分析。The light weight of the Laminated of Timber, CLT, is about 0.2 times the weight of the concrete. It is also economical and recyclable from natural materials. CLT panel used in high-raise steel buildings, in addition to the convenience and speed of on-site assembly, CLT flooring panel can reduce the weight of each floor due to its light weight, thereby reducing the design seismic force, making the size and cross-section of the beam-column structure smaller, and increasing the net height of the floor height and the usable area indoor. Nowadays, due to the different geographical environments around the world, each country has its own exclusive tree species. In addition, Japan has developed CLT products with the outer layer of cypress and the inner layer of fir for optimizing the performance and economy of CLT products. In order to provide structural designers with a rapid and reliable stress analysis method, this study discusses the CLT test data and numerical simulation results in a verification way to compare the cross-section properties of these two. The results suggest that when CLT has different integrated component sections, the bending elastic coefficient E can be obtained by simulation, and accurate section stress analysis can be provided under different support boundary conditions and different load forms.

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18

Blagoeva, Rumiana, Assen Nedev, and Victoria Michailova. "Numerical Modelling of Indomethacin Release from Pnipam- G –Peo Micellar Nanoparticles." Indian Journal of Applied Research 4, no. 3 (2011): 433–35. http://dx.doi.org/10.15373/2249555x/mar2014/136.

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19

Petrov, I. B., V. I. Golubev, K. A. Beklemisheva, and A. V. Vasukov. "Numerical modeling of earthquake impact on engineering structures on Arctic shelf." Computational Mathematics and Information Technologies 2 (2017): 163–68. http://dx.doi.org/10.23947/2587-8999-2017-2-163-168.

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20

Rögnvaldsson, Ólafur, Philippe Crochet, and Haraldur Ólafsson. "Mapping of precipitation in Iceland using numerical simulations and statistical modeling." Meteorologische Zeitschrift 13, no. 3 (2004): 209–19. http://dx.doi.org/10.1127/0941-2948/2004/0013-0209.

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21

Dubled, Morgane, and Young-bae Kim. "Numerical Analysis and Modelling of Solar Still with Granular Activated Carbon." Bonfring International Journal of Power Systems and Integrated Circuits 7, no. 2 (2017): 13–18. http://dx.doi.org/10.9756/bijpsic.8335.

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22

Somjaivang, Dussadee, and Settapat Chinviriyasit. "Numerical Modeling of an Influenza Epidemic Model with Vaccination and Diffusion." International Journal of Applied Physics and Mathematics 4, no. 1 (2014): 68–74. http://dx.doi.org/10.7763/ijapm.2014.v4.257.

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23

Chhatkuli, Subas, and Masayuki Fujihara. "Numerical Modeling of Flow in Fishways Embedded with Circular/Rectangular Obstructions." Journal of Rainwater Catchment Systems 14, no. 2 (2009): 9–19. http://dx.doi.org/10.7132/jrcsa.kj00005284804.

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24

Gadirov, R. "Numerical modeling of the process of extrusion of high-viscosity pastes." Eurasian Physical Technical Journal 21, no. 1 (47) (2024): 114–23. http://dx.doi.org/10.31489/2024no1/114-123.

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This paper provides a theoretical consideration of the process of paste extrusion using a piston dispenser. The paste is considered as a highly viscous suspension of terpineol and silver particle powder. As a result of numerical modeling, the distribution of silver particles in a steady paste flow was obtained. The excess pressure in the piston depending on its speed and the effective width of the track depending on the piston speed were obtained. Modeling showed that the viscosity of the paste has the greatest influence on the extrusion process. Application of the obtained dependencies will allow you to control the paste extrusion process.

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25

Kurura Tinega, Abel, and Omariba Geofrey Ong'era. "Numerical Modeling of Vibratory Motion of Shock Absorber Performance in Automobiles." International Journal of Science and Research (IJSR) 12, no. 10 (2023): 1411–16. http://dx.doi.org/10.21275/sr231011180928.

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26

Lara, Javier, Benedetto Di Paolo, Gabriel Barajas, Maria Maza, Julio Garcia-Maribona, and Inigo J. Losada. "NEW DEVELOPMENTS FOR CFD HYBRID MODELING FOR NUMERICAL WAVE TANKS." Coastal Engineering Proceedings, no. 36v (December 28, 2020): 51. http://dx.doi.org/10.9753/icce.v36v.waves.51.

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The use of CFD for numerical representation of laboratory wave flume and basins, commonly known as numerical wave tanks (NWT), has become more popular in recent years with the aim of improving knowledge in the field of wave-structure interaction (WSI), both fixed and floating, due to advances that have been made in numerical modelling, mainly with the reproduction of three dimensional problems. The use of this technique is displacing even traditional approaches based on the use of potential flow equations, due to the versatility provided by the CFD approach, which allows considering nonlinear interactions between structures and waves, and above all, extreme events such as wave breaking. However, implementation of these models as a complementary tool to physical modeling facilities is not yet standardized and requires further development to hybridize these two techniques, numerical and experimental, in order to obtain a better knowledge of physical processes. Implementation still requires overcoming existing modeling limitations and the additional steps to be taken focus on the following areas are: a) numerically mirror wave generation and active/passive absorption in physical installations; b) numerical resolution of WSI problems, which to date depends on each WSI case; c) computational cost, which may be the bottleneck for NWT implementation; and, finally, the most important feature that is where the added value of the hybrid approach lies, d) the exchange of information between the laboratory measurements and the results of the numerical simulations in order to obtain a better understanding of WSI problems. This paper will present an analysis of the main aspects described above for the implementation of hybrid techniques for the study of WSI problems (floating and fixed). The latest advances in modeling developed with IHFOAM solver (ihfoam.ihcantabria.com), and physical modeling procedures to link laboratory and numerical tools will be presented. The main objective is establishing a standard procedure to implement this technique in any physical installation.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/6mAQccSrREM

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27

Higdon, Robert L. "Numerical modelling of ocean circulation." Acta Numerica 15 (May 2006): 385–470. http://dx.doi.org/10.1017/s0962492906250013.

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Computational simulations of ocean circulation rely on the numerical solution of partial differential equations of fluid dynamics, as applied to a relatively thin layer of stratified fluid on a rotating globe. This paper describes some of the physical and mathematical properties of the solutions being sought, some of the issues that are encountered when the governing equations are solved numerically, and some of the numerical methods that are being used in this area.

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28

Benim, Ali Cemal, Aydin Cicek, and Arif Mert Eker. "A numerical analysis of the thermohydraulics of an EGS project in Turkey." MATEC Web of Conferences 240 (2018): 05001. http://dx.doi.org/10.1051/matecconf/201824005001.

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A numerical study of the thermohydraulics of an enhanced geothermal system project in Turkey is presented. The solid structures are modelled as porous media, using the numerically determined hydraulic fracturing data of other authors. The influence of several numerical modelling aspects such as the domain size, grid resolution, temporal resolution as well as the discretization scheme are investigated and assessed to obtain highly accurate numerical solutions under the applied modelling assumptions. Using the suggested mathematical and numerical model, different production scenarios are investigated.

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29

Feistauer, Miloslav, Rolf Rannacher, and Karel Kozel. "Proceedings of the 2nd Summer Conference Numerical Modelling in Continuum Mechanics. Preface." Applications of Mathematics 40, no. 3 (1995): 161–62. http://dx.doi.org/10.21136/am.1995.134288.

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30

Acasiete, Frank, and Neisser Pino. "Decaimiento Polinomial y Modelaje Numérico Computacional de la viga de Timoshenko con disipación parcial." Selecciones Matemáticas 5, no. 2 (2018): 164–74. http://dx.doi.org/10.17268/sel.mat.2018.02.04.

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31

Filatova, V. M., V. V. Nosikova, and L. N. Pestov. "APPLICATION OF REVERSE TIME MIGRATION (RTM) PROCEDURE IN ULTRASOUND TOMOGRAPHY, NUMERICAL MODELING." EURASIAN JOURNAL OF MATHEMATICAL AND COMPUTER APPLICATIONS 4, no. 4 (2016): 5–13. http://dx.doi.org/10.32523/2306-6172-2016-4-4-5-13.

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32

Senchenkov, I. K., M. V. Iurzhenko, O. P. Chervinko, O. P. Masiuchok, and M. G. Korab. "Numerical modeling of stress-strain state of elements manufactured by 3D printing." Paton Welding Journal 2021, no. 8 (2021): 21–26. http://dx.doi.org/10.37434/tpwj2021.08.05.

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33

Devouard, Bertrand, and Alain Baronnet. "Axial diffraction of curved lattices: geometrical and numerical modeling. Application to chrysotile." European Journal of Mineralogy 7, no. 4 (1995): 835–46. http://dx.doi.org/10.1127/ejm/7/4/0835.

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34

Pohjonen, Aarne, Joonas Ilmola, Oskari Seppälä, and Olli Leinonen. "Numerical Modelling of Thermo-Mechanical Processes in Steels - An Overview and Recent Progress." Materials Science Forum 1093 (July 21, 2023): 13–20. http://dx.doi.org/10.4028/p-ji0hpt.

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Numerical modelling tools provide valuable means to quantitatively control thermomechanical processing. Several modelling tools have been applied and developed at University of Oulu during previous years, such as finite element models for hot rolling, recrystallization models, heat transfer and conduction model, coupled with phase transformation, as well as cellular automata and phase field models for simulating phase transformation during cooling. This article describes the overall development and recent progress of the developed numerical modeling tools.

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35

Ertas, A., and T. J. Kozik. "A Review of Current Approaches to Riser Modeling." Journal of Energy Resources Technology 109, no. 3 (1987): 155–60. http://dx.doi.org/10.1115/1.3231341.

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The purpose of this paper is to review the progress made during the past two decades towards the structural modeling and the numerical approaches of a more realistic riser analysis. Two or three-dimensional, linear or nonlinear, either static or dynamic riser modelings are reviewed. Suitable numerical solution techniques for different kinds of modelings are discussed and compared.

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36

Covarrubias Contreras, B. Rodrigo, Alec Torres-Freyermuth, and José López González. "Modelado físico y numérico de la interacción de ondas enfocadas con un dique vertical con banqueta baja." Tecnología y ciencias del agua 12, no. 2 (2021): 01–34. http://dx.doi.org/10.24850/j-tyca-2021-02-03.

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Las ondas enfocadas, fenómeno que ocurre en el océano, es responsable del fallo de estructuras localizadas costa afuera. Existen pocos trabajos enfocados a su estudio en zonas cercanas a la costa. En el presente trabajo se estudió la estabilidad y funcionalidad de un dique vertical con banqueta baja en presencia de ondas enfocadas. Para ello, se realizaron ensayos en un canal de oleaje. Mediciones de superficie libre, presiones, subpresiones, y rebase fueron utilizadas para validar un modelo numérico que resuelve las ecuaciones RANS. Las predicciones de rebase y presiones/subpresiones máximas del modelo numérico presentaron diferencias promedio con respecto a las mediciones de 10% y 8%, respectivamente. Posteriormente, el modelo numérico se utilizó para evaluar el papel de la posición relativa de la estructura. Finalmente, se compararon los resultados del modelo físico con formulaciones semi-empíricas, encontrando diferencias significativas en rebase (≈100%) y en presiones y subpresiones (88%). Este estudio demuestra que el uso de modelos tipo RANS es una alternativa a las clásicas formulaciones semi-empíricas, pues se comparan mejor con las mediciones durante este tipo de fenómenos.

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Dashchenko, O. F., Yu М. Svinarov, and O. M. Lymarenko. "Computer modeling and numerical analysis of the prosthesis to fix the forearm fractures." Odes’kyi Politechnichnyi Universytet. Pratsi, no. 2 (June 15, 2015): 128–32. http://dx.doi.org/10.15276/opu.2.46.2015.23.

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38

Sukhinov, A. I., A. E. Chistyakov, E. A. Protsenko, V. V. Sidoryakina, and S. V. Protsenko. "Improvement of numerical solution smoothness for the hydrodynamics problems modeling on rectangular grids." Computational Mathematics and Information Technologies 1, no. 1 (2019): 1–16. http://dx.doi.org/10.23947/2587-8999-2019-1-1-1-16.

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39

Ermolenko, D. Yu, and V. V. Golovko. "Numerical modeling and prediction of weld microstructure in high-strength steel welding (Review)." Paton Welding Journal 2014, no. 3 (2014): 2–10. http://dx.doi.org/10.15407/tpwj2014.03.01.

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40

Nallusamy, Nallusamy, Panneerselvam Malathi Sivaram, and Mariappan Suresh. "Numerical Modelling of Solar Parabolic Trough Receiver Employed for Thermal Energy Storage System." Journal of Clean Energy Technologies 5, no. 2 (2017): 107–13. http://dx.doi.org/10.18178/jocet.2017.5.2.353.

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41

Kuder, Jörg. "Assessment of the geothermal potential of fault zones in Germany by numerical modelling." Zeitschrift der Deutschen Gesellschaft für Geowissenschaften 169, no. 3 (2018): 429–44. http://dx.doi.org/10.1127/zdgg/2018/0130.

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42

Carrez, Philippe, Patrick Cordier, David Mainprice, and Andrea Tommasi. "Slip systems and plastic shear anisotropy in Mg2SiO4 ringwoodite: insights from numerical modelling." European Journal of Mineralogy 18, no. 2 (2006): 149–60. http://dx.doi.org/10.1127/0935-1221/2006/0018-0149.

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43

Balczó, Márton Gromke, and Bodo Ruck. "Numerical modeling of flow and pollutant dispersion in street canyons with tree planting." Meteorologische Zeitschrift 18, no. 2 (2009): 197–206. http://dx.doi.org/10.1127/0941-2948/2009/0361.

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44

Bertolesi, Elisa, Francesco Fabbrocino, Antonio Formisano, Ernesto Grande, and Gabriele Milani. "FRP-Strengthening of Curved Masonry Structures: Local Bond Behavior and Global Response." Key Engineering Materials 747 (July 2017): 134–41. http://dx.doi.org/10.4028/www.scientific.net/kem.747.134.

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The aim of the paper is to propose and assess the reliability of a modeling strategy which combines the homogenization of the masonry material and the use of zero-thickness interface elements. This strategy is specifically proposed for numerically investigating the structural response of FRP-reinforced curved masonry structures. Indeed, in order to consider the influence of the geometry curvature of the masonry substrate on the local bond behavior of the FRP-strengthening system, bond-slip laws which specifically account for the geometric curvature of the substrate are introduced at the FRP/substrate interface layer. Numerical analyses concerning masonry arches selected from the current literature are presented in the paper in order to assess the reliability of the proposed modelling approach.

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Liu, Yue, Noam Weisbrod, and Alexander Yakirevich. "Comparative Study of Methods for Delineating the Wellhead Protection Area in an Unconfined Coastal Aquifer." Water 11, no. 6 (2019): 1168. http://dx.doi.org/10.3390/w11061168.

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Various delineation methods, ranging from simple analytical solutions to complex numerical models, have been applied for wellhead protection area (WHPA) delineation. Numerical modeling is usually regarded as the most reliable method, but the uncertainty of input parameters has always been an obstacle. This study aims at examining the results from different WHPA delineation methods and addressing the delineation uncertainty of numerical modeling due to the uncertainty from input parameters. A comparison and uncertainty analysis were performed at two pumping sites—a single well and a wellfield consisting of eight wells in an unconfined coastal aquifer in Israel. By appointing numerical modeling as the reference method, a comparison between different methods showed that a semi-analytical method best fits the reference WHPA, and that analytical solutions produced overestimated WHPAs in unconfined aquifers as regional groundwater flow characteristics were neglected. The results from single well and wellfield indicated that interferences between wells are important for WHPA delineation, and thus, that only semi-analytical and numerical modelling are recommended for WHPA delineation at wellfields. Stochastic modeling was employed to analyze the uncertainty of numerical method, and the probabilistic distribution of WHPAs, rather a deterministic protection area, was generated with considering the uncertain input hydrogeological parameters.

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Faisal, Fahim, Md Rayhan Mirza, Sadia Afrin, and Debasish Sen. "Modeling and Verification of Multi-Strut Modeling Approach of Masonry Panel Surrounded by RC Frame." Journal of Engineering Science 13, no. 2 (2023): 21–29. http://dx.doi.org/10.3329/jes.v13i2.63723.

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Bangladesh which lies in an earthquake-prone region, possesses many seismically vulnerable structures and would need to be strengthened for future usage following the current building code. In this context, assessing the responses of the existing building frames with or without infilled masonry is essential for designing an adequate strengthening scheme that would be suitable for the building. The current study intends to model and simulate one of the available masonry infilled test specimens where the fiber modeling approach of RC member and the multi-strut model of infill masonry have been considered. In addition, the numerically obtained lateral strength has also been compared with analytically evaluated lateral strength. The lateral responses obtained from the numerical analysis showed a fair agreement with the experimental cyclic behavior having a ratio of experimental to the numerical lateral capacity of 0.97. The numerical lateral strength also indicates good conformity with analytical evaluation having an analytical to numerical lateral capacity ratio of 1.13. Journal of Engineering Science 13(2), 2022, 21-29

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Yushin, Denis Igorevich, Andrey Vladimirovich Smirnov, Nestor Washington Solis Pinargote, Pavel Yurievich Peretyagin, and Ramon Torrecillas San Millan. "Modeling Process of Spark Plasma Sintering of Powder Materials by Finite Element Method." Materials Science Forum 834 (November 2015): 41–50. http://dx.doi.org/10.4028/www.scientific.net/msf.834.41.

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This paper investigates and analyses use of numerical modeling by finite element method (FEM) at studying of consolidation processes of materials from powder by spark plasma sintering (SPS). Tasks of SPS process optimization is discussed in detail. Examples of numeric analysis of SPS of current conducting and non-conducting materials are given. Numeric modeling of sample sintering with hybrid method when SPS process is combined with hot pressing (HP) process is studied. Also paper presents development prospects of principles of SPS process numeric modeling.

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Baluch, Khaqan, Heon-Joon Park, Kyuchan Ji, and Sher Q. Baluch. "3D Numerical Model Validation Using Experimental Test Data for Patrind Hydropower Project." Water 16, no. 2 (2024): 360. http://dx.doi.org/10.3390/w16020360.

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Whilst numerical modelling is commonly used for simulation to check the design of water conveyance, sluicing and spillway structure design, the numerical modelling has rarely been compared with the physical model tests. The objective of this research presented in this paper was to examine the validity and suitability of the numerical computational fluid dynamics (CFD) modeling method within an ANSYS Fluent/CFD R 18.2 software and compare its results with a fully instrumented and well-run physical model test at the 1:45 scale, carried out for Patrind Hydropower Project located in Pakistan. The physical model test was conducted for confirmation and optimization of a natural de-sanding basin, and diversion of suspended sediment-rich flood waters using a bypass tunnel. The numerical simulation was able to reproduce physical model test results and data gathered over a 7-year project operation to an acceptable level of accuracy. A detailed explanation of the approach used in numerical modelling together with analysis of simulation diagrams of ANSYS Fluent/CFD is also presented. The research shows that a 3D numerical model with accurate boundary conditions and mesh size can replace the need for physical model tests.

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Richer, Blanche, Ali Saeidi, Maxime Boivin, and Alain Rouleau. "Overview of Retrogressive Landslide Risk Analysis in Sensitive Clay Slope." Geosciences 10, no. 8 (2020): 279. http://dx.doi.org/10.3390/geosciences10080279.

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Sensitive clays are known for producing retrogressive landslides, also called spread or flowslides. The key characteristics associated with the occurrence of these landslides on a sensitive clay slope must be assessed, and the potential retrogressive distance must be evaluated. Common risk analysis methods include empirical methods for estimating the distance of potential retrogression, analytical limit equilibrium methods, numerical modelling methods using the strength reduction technique, and the integration of a progressive failure mechanism into numerical methods. Methods developed for zoning purposes in Norway and Quebec provide conservative results in most cases, even if they don’t cover the worst cases scenario. A flowslide can be partially analysed using analytical limit equilibrium methods and numerical methods having strength reduction factor tools. Numerical modelling of progressive failure mechanisms using numerical methods can define the critical parameters of spread-type landslides, such as critical unloading and the retrogression distance of the failure. Continuous improvements to the large-deformation numerical modeling approach allow its application to all types of sensitive clay landslides.

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Lanchava, Omar, Nicolae Ilias, Giorgi Javakhishvili, Sorin Mihai Radu, and Leon Makharadze. "Influence of current direction in longitudinal ventilated road tunnels on the backflow of combustion Produits." MATEC Web of Conferences 373 (2022): 00076. http://dx.doi.org/10.1051/matecconf/202237300076.

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The results of numerical modeling in longitudinal ventilated sloping road tunnels are given. The slope of the tunnels varies in the range of 0-6%. The geometry of the tunnel is as follows: length: 100 m; width: 8 m; height: 6 m; area of the seat of fire: 16 m2. The seat of fire sized: 2.75x5.8x1.5 m is in the central part of the tunnel. The scenarios of development of 5, 10, 20, 30, 50 MW fires are studied in the case of positive and negative directional ventilation flows. The time of modelling was 120 seconds. The numerical problems were modelled with a volumetric grid method. The grid cell dimensions were: 0.5*0.5*0.5 m. Virtual point and volumetric measuring equipment was used to record the modeling results. The modelling used 4 groups of measuring devices that measured and recorded air velocity, temperature, and air and smoke densities. The paper discusses cases of algebraically summarizing the ventilation and fire-induced flows. Based on the results of numerical modeling, we can point out that the widely accepted indices of critical velocity and back-layering length in inclined road tunnels often give erroneous results. Therefore, in strategies for emergency ventilation, indicators such are critical velocity and back-separation should be used with caution.

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