Modeling of SOFC Anodes Based on the Stochastic Reconstruction Scheme

2019 ◽  
Vol 7 (1) ◽  
pp. 2049-2055 ◽  
Author(s):  
Yoshinori Suzue ◽  
Naoki Shikazono ◽  
Nobuhide Kasagi
Keyword(s):  
Reconstruction Scheme ◽  
Stochastic Reconstruction

A hybrid process-based and stochastic reconstruction method of porous media

2008 ◽  
Vol 110 (1) ◽  
pp. 92-99 ◽  
Author(s):  
M.G. Politis ◽  
E.S. Kikkinides ◽  
M.E. Kainourgiakis ◽  
A.K. Stubos
Keyword(s):  
Porous Media ◽  
Hybrid Process ◽  
Reconstruction Method ◽  
Stochastic Reconstruction

Stochastic Reconstruction of Complex Heavy Oil Molecules Using an Artificial Neural Network

2017 ◽  
Vol 31 (11) ◽  
pp. 11932-11938 ◽  
Author(s):  
Celal Utku Deniz ◽  
Muzaffer Yasar ◽  
Michael T. Klein
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Heavy Oil ◽  
Stochastic Reconstruction ◽  
Artificial Neural

scholarly journals Dual-Path State Reconstruction Scheme for Propagating Quantum Microwaves and Detector Noise Tomography

2010 ◽  
Vol 105 (10) ◽  
Author(s):  
E. P. Menzel ◽  
F. Deppe ◽  
M. Mariantoni ◽  
M. Á. Araque Caballero ◽  
A. Baust ◽  
...  
Keyword(s):  
State Reconstruction ◽  
Detector Noise ◽  
Reconstruction Scheme

scholarly journals GENERAL FRAMEWORK FOR CONSISTENT SAMPLING IN HILBERT SPACES

2005 ◽  
Vol 03 (04) ◽  
pp. 497-509 ◽  
Author(s):  
YONINA C. ELDAR ◽  
TOBIAS WERTHER
Keyword(s):  
Hilbert Spaces ◽  
General Framework ◽  
Inner Product ◽  
Riesz Bases ◽  
Oblique Projection ◽  
Dual Frames ◽  
Infinite Dimensional ◽  
Reconstruction Scheme ◽  
Linear Reconstruction ◽  
Oblique Dual

We introduce a general framework for consistent linear reconstruction in infinite-dimensional Hilbert spaces. We study stable reconstructions in terms of Riesz bases and frames, and generalize the notion of oblique dual frames to infinite-dimensional frames. As we show, the linear reconstruction scheme coincides with the so-called oblique projection, which turns into an ordinary orthogonal projection when adapting the inner product. The inner product of interest is, in general, not unique. We characterize the inner products and corresponding positive operators for which the new geometrical interpretation applies.

scholarly journals Multiphase CFD Modeling of External Oil Flow From a Journal Bearing

2018 ◽  
Author(s):  
Martin Berthold ◽  
Hervé Morvan ◽  
Richard Jefferson-Loveday ◽  
Benjamin C. Rothwell ◽  
Colin Young
Keyword(s):  
Boundary Conditions ◽  
Journal Bearing ◽  
Flow Behavior ◽  
Phase Interface ◽  
Numerical Schemes ◽  
Ansys Fluent ◽  
Oil Film ◽  
Reconstruction Scheme ◽  
Geometric Reconstruction ◽  
Oil Flow

High loads and bearing life requirements make journal bearings a potential choice for use in high power, epicyclic gearboxes in jet engines. Particularly in a planetary configuration the kinematic conditions are complex. With the planet gears rotating about their own axis and orbiting around the sun gear, centrifugal forces generated by both motions interact with each other and affect the external flow behavior of the oil exiting the journal bearing. Computational Fluid Dynamics (CFD) simulations using the Volume of Fluid (VoF) method are carried out in ANSYS Fluent [1] to numerically model the two-phase flow behavior of the oil exiting the bearing and merging into the air surrounding the bearing. This paper presents an investigation of two numerical schemes that are available in ANSYS Fluent to track or capture the air-oil phase interface: the geometric reconstruction scheme and the compressive scheme. Both numerical schemes are used to model the oil outflow behavior in the most simplistic approximation of a journal bearing: a representation, rotating about its own axis, with a circumferentially constant, i.e. concentric, lubricating gap. Based on these simplifications, a three dimensional (3D) CFD sector model with rotationally periodic boundaries is considered. A comparison of the geometric reconstruction scheme and the compressive scheme is presented with regards to the accuracy of the phase interface reconstruction and the time required to reach steady state flow field conditions. The CFD predictions are validated against existing literature data with respect to the flow regime, the direction of the predicted oil flow path and the oil film thickness. Based on the findings and considerations of industrial requirements, a recommendation is made for the most suitable scheme to be used. With a robust and partially validated CFD model in place, the model fidelity can be enhanced to include journal bearing eccentricity. Due to the convergent-divergent gap and the resultant pressure field within the lubricating oil film, the outflow behavior can be expected to be very different compared to that of a concentric journal bearing. Naturally, the inlet boundary conditions for the oil emerging from the journal bearing into the external environment must be consistent with the outlet conditions from the bearing. The second part of this paper therefore focuses on providing a method to generate appropriate inlet boundary conditions for external oil flow from an eccentric journal bearing.

scholarly journals Reconstructed f(R) Gravity and Its Csmological Consequences in Chameleon Scalar Field with A Scale Factor Describing The Pre-Bounce Ekpyrotic Contraction

2020 ◽  
Author(s):  
Soumyodipta Karmakar ◽  
Kairat Myrzakulov ◽  
Surajit Chattopadhyay ◽  
Ratbay Myrzakulov
Keyword(s):  
Scalar Field ◽  
Sufficient Conditions ◽  
State Parameter ◽  
Realistic Model ◽  
Scale Factor ◽  
Sufficient Condition ◽  
Reconstruction Scheme ◽  
Exponential Expansion ◽  
Big Crunch ◽  
Subsequent Phase

Inspired by the work of S. D. Odintsov and V. K. Oikonomou, Phys. Rev. D 92, 024016 (2015) [1], the present study reports a reconstruction scheme for f (R) gravity with the scale factor a(t) µ (t * - t) c22describing the pre-bounce ekpyrotic contraction, where t is the big crunch time. The reconstructed f (R) is used to derive expressions for density and pressure contributions and the equation of state parameter resulting from this reconstruction is found to behave like "quintom". It has also been observed that the reconstructed f (R) has satisfied a sufficient condition for a realistic model. In the subsequent phase the reconstructed f (R) is applied to the model of chameleon scalar field and the scalar field f and the potential V(f) are tested for quasi-exponential ex pansion. It has been observed that although the reconstructed f (R) satisfies one of the sufficient conditions for realistic model, the quasi-exponential expansion is not available due to this reconstruction. Finally, the consequences pre-bounce ekpyrotic inflation i n f (R) gravity are compared to the background solution for f (R) matter bounce.

scholarly journals Cosmology of Barrow Holographic Dark Energy as Nojiri-Odintsov Holographic Dark Energy with Specific Cut-off and the Thermodynamics

2021 ◽  
Author(s):  
Gargee Chakraborty ◽  
Surajit Chattopadhyay ◽  
Ertan Güdekli ◽  
Irina Radinschi
Keyword(s):  
Phase Transition ◽  
Dark Energy ◽  
Holographic Dark Energy ◽  
Second Law Of Thermodynamics ◽  
Electroweak Symmetry Breaking ◽  
Second Law ◽  
Late Time ◽  
Electroweak Symmetry ◽  
Eos Parameter ◽  
Reconstruction Scheme

Motivated by the work of Saridakis (Phys. Rev. D 102, 123525 (2020)), the present study reports the cosmological consequences of Barrow holographic dark energy (HDE) and its thermodynamics. Literatures demonstrate that Dark Energy (DE) may result from electroweak symmetry breaking that triggers a phase transition from early inflation to late time acceleration. In the present study, we incorporated viscosity in the Barrow HDE. A reconstruction scheme is presented for the parameters associated with Barrow holographic dark energy under the purview of viscous cosmology. Equation of state (EoS) parameter is reconstructed in this scenario and quintessence behaviour is observed. Considering BarrowHDE as a specific case ofNojiri-Odintsov (NO) HDE, we have observed quintom behaviour of the EoS parameter and for some values of n the EoS has been observed to be very close to −1 for the current universe. The generalised second law of thermodynamics has come out to be valid in all the scenarios under consideration. Physical viability of considering Barrow HDE as a specific case of NO HDE is demonstrated in this study.

scholarly journals Stochastic reconstruction of multiple source atmospheric contaminant dispersion events

2013 ◽  
Vol 74 ◽  
pp. 45-51 ◽  
Author(s):  
Derek Wade ◽  
Inanc Senocak
Keyword(s):  
Multiple Source ◽  
Contaminant Dispersion ◽  
Stochastic Reconstruction
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