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Relevant bibliographies by topics / Langrangian approach

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Academic literature on the topic 'Langrangian approach'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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Journal articles on the topic "Langrangian approach"

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Lai, Chun-Ta, Gabriel Katul, David Ellsworth, and Ram Oren. "Modelling Vegetation-Atmosphere Co2 Exchange By A Coupled Eulerian-Langrangian Approach." Boundary-Layer Meteorology 95, no. 1 (2000): 91–122. http://dx.doi.org/10.1023/a:1002473906184.

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COTE, J. "A Lagrange multiplier approach for the metric terms of semi-Langrangian models on the sphere." Quarterly Journal of the Royal Meteorological Society 114, no. 483 (1988): 1347–52. http://dx.doi.org/10.1256/smsqj.48309.

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Gług, Maciej, and Jarosław Wąs. "Modeling of oil spill spreading disasters using combination of Langrangian discrete particle algorithm with Cellular Automata approach." Ocean Engineering 156 (May 2018): 396–405. http://dx.doi.org/10.1016/j.oceaneng.2018.01.029.

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Minh Thanh, Vu, Sigit P. Santosa, Djarot Widagdo, and Ichsan Setya Putra. "Steel Plate Behavior under Blast Loading-Numerical Approach Using LS-DYNA." Applied Mechanics and Materials 842 (June 2016): 200–207. http://dx.doi.org/10.4028/www.scientific.net/amm.842.200.

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Plate is one of the most common structural elements, which appears in a wide range of applications: steel bridges, blast-resistance door, and armored vehicles. In this paper, the behavior of steel plates under blast loading was studied through numerical approaches using LS DYNA and then the results were compared with the experiment results obtained from existing literatures. The study of a clamped square plate exposed to blast loading in three distinct stand-off distances. Three different methods of modeling blast loading were used, namely: empirical blast method, arbitrary Lagrangian Eulerian

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Sidebang, Wiwin Roslinda, Ade Ali Nurdin, and Mochamad Edman Syarief. "Pengaruh ROE dan DER Terhadap Dividend Payout Ratio pada Industri Barang Konsumsi di Bursa Efek Indonesia." Indonesian Journal of Economics and Management 2, no. 3 (2022): 599–613. http://dx.doi.org/10.35313/ijem.v2i3.3163.

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This research was conducted the Financial Statements of the Consumer Goods Industry listed on Bursa Efek IndonesiaIn 2014-2019. The phenomenon occurs is the consumer goods industry experiences fluctuating amount of net profit so Return On Equity (ROE) is the same. Most of the capital cannot meet the amount of debt, which makes the value of Debt to Equity Ratio (DER) high. In addition, companies continue to provide dividends even though experience losses. The purpose of this was to determine effect of ROE and DER on Dividend Payout Ratio (DPR). Using Panel Data Regression Analysis through three

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Marrouchi, Sahbi, Moez Ben Hessine, and Souad Chebbi. "Optimizing Unit Scheduling with Fuzzy Logic: A Strategic Approach for Efficient Power Network Operations." Engineering, Technology & Applied Science Research 14, no. 2 (2024): 13305–12. http://dx.doi.org/10.48084/etasr.6894.

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This study delves into addressing the challenge of resolving the Unit Commitment (UC) problem, which focuses on enhancing the efficiency of production units and devising their operational schedules to accommodate fluctuations in consumption spanning from a day to a month. Given the intricate, combinatorial, and nonlinear constraints associated with each production unit, this study advocates an optimization approach rooted in fuzzy logic. A Langrangian function was established to simplify the UCP and to transform the different inequality into a linear unconstrained problem. The choice of fuzzy

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Valášek, Jan, and Petr Sváček. "Aeroacoustic computation of fluid-structure interaction problems with low Mach numbers." EPJ Web of Conferences 180 (2018): 02113. http://dx.doi.org/10.1051/epjconf/201818002113.

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This contribution deals with the acoustic simulation of aerodynamical noise generated by a flow over an airfoil or by flow in a flexible channel. Since the considered flow has low Mach number the hybrid approach of acoustic analogies can be applied here with benefits. The fluid-structure-acoustic interaction problem is generally described as a quite complicated problem comprising of three different physical fields - the vibration of the elastic body, the unsteady fluid flow and the acoustics together with mutual couplings. The fluid flow in time dependent domain is governed by the incompressib

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Kreitmayer, Diana, Srikanth R. Gopireddy, Tomomi Matsuura, et al. "Numerical and Experimental Investigation of the Hydrodynamics in the Single-Use Bioreactor Mobius® CellReady 3 L." Bioengineering 9, no. 5 (2022): 206. http://dx.doi.org/10.3390/bioengineering9050206.

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Two-way Euler-Lagrange simulations are performed to characterize the hydrodynamics in the single-use bioreactor Mobius® CellReady 3 L. The hydrodynamics in stirred tank bioreactors are frequently modeled with the Euler–Euler approach, which cannot capture the trajectories of single bubbles. The present study employs the two-way coupled Euler–Lagrange approach, which accounts for the individual bubble trajectories through Langrangian equations and considers their impact on the Eulerian liquid phase equations. Hydrodynamic process characteristics that are relevant for cell cultivation including

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Hussain, Muzamal, Muhammad Nawaz Naeem, and Mohammad Reza Isvandzibaei. "Effect of Winkler and Pasternak elastic foundation on the vibration of rotating functionally graded material cylindrical shell." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 24 (2018): 4564–77. http://dx.doi.org/10.1177/0954406217753459.

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In this paper, vibration characteristics of rotating functionally graded cylindrical shell resting on Winkler and Pasternak elastic foundations have been investigated. These shells are fabricated from functionally graded materials. Shell dynamical equations are derived by using the Hamilton variational principle and the Langrangian functional framed from the shell strain and kinetic energy expressions. Elastic foundations, namely Winkler and Pasternak moduli are inducted in the tangential direction of the shell. The rotational motions of the shells are due to the Coriolis and centrifugal accel

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Lu, Hongshi, Li Aijun, Wang Changqing, and Zabolotnov Michaelovitch Yuriy. "Impact analysis and adaptive sliding mode control for cislunar payload transportation using spinning tether system." Aircraft Engineering and Aerospace Technology 90, no. 8 (2018): 1168–79. http://dx.doi.org/10.1108/aeat-02-2017-0067.

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Purpose This paper aims to present the impact analysis of payload rendezvous with tethered satellite system and the design of an adaptive sliding mode controller which can deal with mass parameter uncertainty of targeted payload, so that the proposed cislunar transportation scheme with spinning tether system could be extended to a wider and more practical range. Design/methodology/approach In this work, dynamical model is first derived based on Langrangian equations to describe the motion of a spinning tether system in an arbitrary Keplerian orbit, which takes the mass of spacecraft, tether an

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Dissertations / Theses on the topic "Langrangian approach"

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Hawkins, Jeffrey Thomas 1977. "A Langrangian decomposition approach to weakly coupled dynamic optimization problems and its applications." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29599.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2003.<br>Includes bibliographical references (p. 187-192).<br>We present a Lagrangian based approach to decoupling weakly coupled dynamic optimization problems for both finite and infinite horizon problems. The main contributions of this dissertation are: (i) We develop methods for obtaining bounds on the optimal cost based on solving low dimensional dynamic programs; (ii) We utilize the resulting low dimensional dynamic programs and combine them using integer programming methods to

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Taffoni, Giuliano. "Formation and Evolution of Dark Matter Haloes in Hierarchical Models for Structure Formation." Doctoral thesis, SISSA, 2002. http://hdl.handle.net/20.500.11767/4286.

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The layout of this thesis is the following. In Chapter 2, I introduce some basic elements of modem cosmology and devote special attention to recent observational constraints on cosmological parameters. I also review the theory of gravitational instability, paying particular attention to the theory of collapse of the initial density perturbations. Chapter 3 deals with the issue of hierarchical clustering. I present a Monte Carlo code to generate catalogues of haloes based on the EPS formalism, and then compare its results with numerical simulations. In Chapters 4, 5, and 6 PINOCCHIO code is pre

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Fugleberg, Todd Darwin. "Vacuum structure of QCD in an effective Langrangian approach." Thesis, 2000. http://hdl.handle.net/2429/11141.

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The vacuum structure of QCD is studied using an anomalous effective Lagrangian approach. This approach makes it possible to determine how physical observables depend on the strong CP violation parameter, θ. The θ -dependence of QCD and the phenomenology of the light pseudoscalar mesons in this theory are illustrated. The vacuum structure of QCD is shown to be quite complex with the prediction of a number of different types of nontrivial vacuum states. Two specific examples of nontrivial vacuum states are analysed in more detail. The decay rate of a metastable vacuum state for the θ = 0 c

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Book chapters on the topic "Langrangian approach"

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Widyadanaa, Gede Agus, and Hui Ming Wee. "A Multi-Product EPQ Model with Discrete Delivery Order: A Langrangean Solution Approach." In Global Perspective for Competitive Enterprise, Economy and Ecology. Springer London, 2009. http://dx.doi.org/10.1007/978-1-84882-762-2_57.

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Conference papers on the topic "Langrangian approach"

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Singh, Rajiv Kumar, Jitendra Shukla, Aishwarya Chandel, and Harshit Singh. "Electron Bunching and Power Growth in a Gyro-TWT Amplifier: A Langrangian Approach." In 2020 IEEE International Conference on Computing, Power and Communication Technologies (GUCON). IEEE, 2020. http://dx.doi.org/10.1109/gucon48875.2020.9231068.

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Abid, Muhammad, and Adnan Aslam Noon. "Turbulent Flow Simulations Through Tarbela Dam Tunnels Considering the Effect of Sediment Particles." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24201.

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The sediments inflow in the Tarbela reservoir is resulting in reduction in water storage capacity and damage to the tunnels carrying water to the power generating units and ultimately to the plant equipment. The turbulent flow in tunnel-2 of the Tarbela Dam Project (TDP) is analyzed for the sediment particles tracking in ANSYS CFX. The particles flow in the tunnel is considered random and striking the tunnel walls at different impact angles. Langrangian particles tracking approach is used for the particles deposition, which is a oneway coupling phenomena as the carrier phase is unaffected by t

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Gupta, Amit, and J. T. Kshirsagar. "Numerical Experiments on Solid Handling Pump." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98004.

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Solid handling pumps are used in managing sewage and other solid materials that could flow along with the water or any other fluid. The design of solid handling pump components is also deviating significantly from clear water pump components. The flow passages need to be maintained to allow solid particles of specified sizes smoothly without any obstruction. This aspect of different design from conventional design causes performance deterioration of the pump. The laboratory testing of the solid handling pumps is normally carried out with clear water and a judgment is used based on experience a

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Hong, Chungpyo, Yutaka Asako, and Koichi Suzuki. "Performance of Parallel-Flow Gas-to-Gas Micro-Double-Tubes-Heat Exchangers." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12430.

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Heat transfer performance of two-stream parallel-flow gas-to-gas micro-double-tubes-heat exchangers was investigated numerically. The flow passages of the micro- double-tubes-heat exchanger are a circular tube for hot passage and a concentric annular tube for cold passage. A circular tube of r = 50 μm and a concentric annular tube of ri = 51 μm and ro = 71 μm with an identical cross-sectional area were chosen and the selected length was 20mm, respectively. Then, the partition wall is assumed to be a stainless steel tube with 1 μm in thickness. Numerical methodology is based on the arbitrary-La

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Croce, Giulio, Paola D’Agaro, and Nicola Suzzi. "Optimization of Hybrid Hydrophilic-Hydrophobic Surfaces for Dropwise Condensation Enhancement." In ASME 2019 17th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/icnmm2019-4291.

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Abstract A langrangian-based phenomenological model, following the evolution of the individual droplets nucleating at random positions, is applied to the simulation and optimization of hybrid, mixed hydrophobic and hydrophilic surfaces. The proposed mathematical model was originally developed to simulate droplets pattern evolution in the framework of in-flight icing problems and takes into account the surface tension effects (via the advancing and receding contact angle values), the external force balance on the single droplets, as well as the both the condensing and coalescence process. Here,

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Yi, Jiang Tao, Fook Hou Lee, Siang Huat Goh, Yu Ping Li, and Xi Ying Zhang. "Effective-Stress Finite Element Analysis of Spudcan Penetration." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83138.

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The numerical modeling of spudcan penetration involves technical challenges posed by large soil deformation coupled with significant material non-linearity. The Lagrangian approach commonly used for solid stress analysis often does not work well with large deformations, resulting in premature termination of the analysis. Recently, the Arbitrary Langrangian Eulerian (ALE) and the Eulerian methods have been used in spudcan analysis to overcome problems caused by the soil flow and large deformation. However, most of the reported studies are based on total stress analysis and therefore shed no lig

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Pike, Kenton, Gang Duan, Jason Sun, and Paul Jukes. "Comprehensive FEA of Thermal Mitigation Buoyancy Module (TMBM)–Soil Interaction Using the Coupled Eulerian–Lagrangian (CEL) Method." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20885.

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Thermal expansion and global buckling is a critical design aspect for subsea flowline systems subjected to high pressure and high temperature (HPHT). In the Gulf of Mexico, HPHT oil/gas production is becoming exceedingly common as drilling and production depths extend deeper. Advanced finite element analysis becomes essential for flowline expansion and buckling design which is highly dependent on pipe-soil interaction behavior. For decades, pipe-soil interaction has been the focus of many research studies and joint industry projects. For HPHT flowline systems, thermal mitigation is decisive fo

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Reports on the topic "Langrangian approach"

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Shashkov, Mikhail, Edward Love, and Guglielmo Scovazzi. A multi-scale Q1/P0 approach to langrangian shock hydrodynamics. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/902215.

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Tremblay, Bruno. Forecasting Future Sea Ice Conditions in the MIZ: A Langrangian Approach. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada572580.

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