The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform
P G Kevrekidis - One of the best experts on this subject based on the ideXlab platform.
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equation free dynamic renormalization in a glassy Compaction Model
Physical Review E, 2006Co-Authors: Liu Chen, Ioannis G Kevrekidis, P G KevrekidisAbstract:Combining dynamic renormalization with equation-free computational tools, we study the apparently asymptotically self-similar evolution of void distribution dynamics in the diffusion-deposition problem proposed by Stinchcombe and Depken [Phys. Rev. Lett. 88, 125701 (2002)]. We illustrate fixed point and dynamic approaches, forward as well as backward in time; these can be used to accelerate simulators of glassy dynamic phenomena.
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equation free dynamic renormalization in a glassy Compaction Model
arXiv: Soft Condensed Matter, 2004Co-Authors: Liu Chen, Ioannis G Kevrekidis, P G KevrekidisAbstract:Combining dynamic renormalization with equation-free computational tools, we study the apparently self-similar evolution of void distribution dynamics in the diffusion-deposition problem proposed by Stinchcombe and Depken [Phys. Rev. Lett. 88, 125701 (2002)]. We illustrate fixed point and dynamic approaches, forward as well as backward in time.
Liu Chen - One of the best experts on this subject based on the ideXlab platform.
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equation free dynamic renormalization in a glassy Compaction Model
Physical Review E, 2006Co-Authors: Liu Chen, Ioannis G Kevrekidis, P G KevrekidisAbstract:Combining dynamic renormalization with equation-free computational tools, we study the apparently asymptotically self-similar evolution of void distribution dynamics in the diffusion-deposition problem proposed by Stinchcombe and Depken [Phys. Rev. Lett. 88, 125701 (2002)]. We illustrate fixed point and dynamic approaches, forward as well as backward in time; these can be used to accelerate simulators of glassy dynamic phenomena.
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equation free dynamic renormalization in a glassy Compaction Model
arXiv: Soft Condensed Matter, 2004Co-Authors: Liu Chen, Ioannis G Kevrekidis, P G KevrekidisAbstract:Combining dynamic renormalization with equation-free computational tools, we study the apparently self-similar evolution of void distribution dynamics in the diffusion-deposition problem proposed by Stinchcombe and Depken [Phys. Rev. Lett. 88, 125701 (2002)]. We illustrate fixed point and dynamic approaches, forward as well as backward in time.
I. Lerche - One of the best experts on this subject based on the ideXlab platform.
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Inversion of dynamical indicators in quantitative basin analysis Models. III. Multiwell information and two-dimensional case histories
Mathematical Geology, 1995Co-Authors: Z. Yu, I. Lerche, Q. BourAbstract:A dynamical tomography method, which inverts dynamical indicators to evaluate the parameters controlling geological processes as well as those in intrinsic equations of state, was introduced into a 2D fluid flow/Compaction Model termed GEOPETII (developed at the University of South Carolina), with the assumption of invariance to spatial location of parameters in equations of state, but allowing geologic process parameters to change with well location. Synthetic tests, including sensitivity analysis, are given to illustrate the operation of the system. The nonlinear inverse two-dimensional tomography method, together with a systematic linear search procedure, provides a useful approach to determine and constrain the parameters entering quantitative Models of dynamical sedimentary evolution. Applying the method to an interpreted section from a seismic line in the Navarin Basin. Bering Sea. Alaska, the predictions of present-day formation thicknesses, porosity, and fluid pressure with depth are improved at four controlling well locations (Amoco Mishu No. 1, Exxon Redwood 1, Exxon Redwood 2, and Amoco Danielle), relative to previous results which used only a forward Model. In this way the geohistory and structural development of the basin can be defined better, which helps in the reconstruction of thermal history, and so of hydrocarbon generation, migration, and accumulation histories in relation to structural and stratigraphic development .
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Inversion of dynamical indicators in quantitative basin analysis Models. II. Synthetic tests and a case history using dynamical indicator tomography
Mathematical Geology, 1993Co-Authors: K. Zhao, I. LercheAbstract:The dynamical evolution of sediments in basins, and their Compaction, is the underpinning keystone on which rests the ability to Model thermal history of the basin and hydrocarbon generation, migration, and accumulation histories. A presentation is given of the dynamical tomography method, which inverts dynamical indicators to evaluate the parameters in a 1-D fluid-flow/Compaction Model, including values dealing with geological events as well as values dealing with intrinsic, or assumed, lithologic equations of state. Synthetic tests illustrate the operation of the system. Using observed downhole quantities: total depth, formation thicknesses, variation of porosity, permeability, and total fluid pressure with depth from the Navarin Basin COST No. 1 well, Bering Sea, Alaska, the numerical algorithm was tested and found to be effective in a nonlinear inverse sense to determine and/or constrain the parameters entering quantitative Models of dynamical sedimentary evolution. The predictions of present day total depth, formation thicknesses, porosity, permeability, and fluid pressure with depth are close to the measured data. The minimization provides the uncertainty in each parameter and so the geohistory of a well can be defined better.
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Thermal impact of salt: Simulation of thermal anomalies in the gulf of Mexico
pure and applied geophysics, 1992Co-Authors: Z. Yu, I. Lerche, A. LowrieAbstract:Salt and related structures have played important roles in controlling hydrocarbon accumulations in the Gulf of Mexico. Using a two-dimensional fluid flow/Compaction Model, which allows for both conduction and convection of heat, an examination is given of the effects on thermal patterns of the combined influence of multiple salt features, including diapirs, pillows, sheets and wedges. The focusing and defocusing of heat due to the higher thermal conductivity of salt are accounted for in the Modeling. The results show that there could be as much as a 30°C anomaly above multi-salt bodies due to the focusing of heat by salt, and as much as 50°C temperature contrast between internal salt positions and sediments external to the salt in the deep part of a section. The magnitude of the thermal anomaly depends on the size (or width) of the salt and on the depth of the rooted salt. The Modeled results provide estimates of the influence of salt in expanding the oil generation window by approximately half of the salt thickness.
Claude Estournes - One of the best experts on this subject based on the ideXlab platform.
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identification of the norton green Compaction Model for the prediction of the ti 6al 4v densification during the spark plasma sintering process
Advanced Engineering Materials, 2016Co-Authors: Charles Manière, Lise Durand, Ronan Mainguy, Denis Delagnes, Julitte Huez, Claude EstournesAbstract:One of the main challenges for the industrialization of the spark plasma sintering (SPS) is to resolve issues linked to the Compaction of real parts with complex shapes. The Modeling of powder Compaction is an interesting tool to predict how the densification field varies during sintering. However, expressing the behavior law which reflect the powder Compaction is often a difficult and long step in the Model establishment. In this paper, a simple methodology for the identification of the densification parameters is proposed. Dense and porous creep tests combined with SPS die Compaction tests are employed to determine a complete densification law on a Ti–6Al–4V alloy directly in a SPS machine. The Compaction Model obtained is successfully validated through prediction of the densification of new SPSed samples.
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Identification of the Norton-Green Compaction Model for the Prediction of the Ti–6Al–4V Densification During the Spark Plasma Sintering Process
Advanced Engineering Materials, 2016Co-Authors: Charles Manière, Lise Durand, Ugras Kus, Ronan Mainguy, Denis Delagnes, Julitte Huez, Claude EstournesAbstract:© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim One of the main challenges for the industrialization of the spark plasma sintering (SPS) is to resolve issues linked to the Compaction of real parts with complex shapes. The Modeling of powder Compaction is an interesting tool to predict how the densification field varies during sintering. However, expressing the behavior law which reflect the powder Compaction is often a difficult and long step in the Model establishment. In this paper, a simple methodology for the identification of the densification parameters is proposed. Dense and porous creep tests combined with SPS die Compaction tests are employed to determine a complete densification law on a Ti–6Al–4V alloy directly in a SPS machine. The Compaction Model obtained is successfully validated through prediction of the densification of new SPSed samples.
Ioannis G Kevrekidis - One of the best experts on this subject based on the ideXlab platform.
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equation free dynamic renormalization in a glassy Compaction Model
Physical Review E, 2006Co-Authors: Liu Chen, Ioannis G Kevrekidis, P G KevrekidisAbstract:Combining dynamic renormalization with equation-free computational tools, we study the apparently asymptotically self-similar evolution of void distribution dynamics in the diffusion-deposition problem proposed by Stinchcombe and Depken [Phys. Rev. Lett. 88, 125701 (2002)]. We illustrate fixed point and dynamic approaches, forward as well as backward in time; these can be used to accelerate simulators of glassy dynamic phenomena.
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equation free dynamic renormalization in a glassy Compaction Model
arXiv: Soft Condensed Matter, 2004Co-Authors: Liu Chen, Ioannis G Kevrekidis, P G KevrekidisAbstract:Combining dynamic renormalization with equation-free computational tools, we study the apparently self-similar evolution of void distribution dynamics in the diffusion-deposition problem proposed by Stinchcombe and Depken [Phys. Rev. Lett. 88, 125701 (2002)]. We illustrate fixed point and dynamic approaches, forward as well as backward in time.