Evaluaciin nummrica tridimensional de un sumidero de reja de fondo (Three-Dimensional Numerical Assessment of Grate Inlet)

2017 ◽  
Author(s):  
Manuel CCrdenas-Quintero ◽  
Luis F. Carvajal-Serna ◽  
Ramiro Marbello-PPrez
Keyword(s):  
Three Dimensional ◽  
Numerical Assessment

Numerical assessment of flow control capabilities of three dimensional woven wire mesh screens

2019 ◽  
Vol 76 ◽  
pp. 259-271 ◽  
Author(s):  
Patrick N. Okolo ◽  
Kun Zhao ◽  
John Kennedy ◽  
Gareth J. Bennett
Keyword(s):  
Flow Control ◽  
Three Dimensional ◽  
Wire Mesh ◽  
Numerical Assessment

scholarly journals Problems of welding in shipbuilding - an analytic-numerical assessment of the thermal cycle in HAZ with three dimensional heat source models in agreement with modelling rules

2010 ◽  
Vol 17 (3) ◽  
pp. 45-52
Author(s):  
Eugeniusz Ranatowski
Keyword(s):  
Temperature Distribution ◽  
Heat Source ◽  
Thermal Cycle ◽  
Computer Calculation ◽  
Three Dimensional ◽  
Analytic Solutions ◽  
Previous Part ◽  
Numerical Assessment ◽  
Source Models

Problems of welding in shipbuilding - an analytic-numerical assessment of the thermal cycle in HAZ with three dimensional heat source models in agreement with modelling rules This part is continuation of PART II. Analytic solutions for the temperature distribution in HAZ - presented in the previous part of this article are transformed for computer calculation with used Mathcad programme. There are established algorithms in moving and stationary systems for thermal cycle calculating. Finally, a few analytical examples with use of C-I-N and D-E models are demonstrated.

scholarly journals A Three-Dimensional Numerical Assessment of Heterogeneity Impact on a Solid Oxide Fuel Cell’s Anode Performance

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 503 ◽  
Author(s):  
Tomasz Prokop ◽  
Katarzyna Berent ◽  
Janusz Szmyd ◽  
Grzegorz Brus
Keyword(s):  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Multiphase Microstructure ◽  
Empirical Relations ◽  
Partial Pressures ◽  
Numerical Assessment ◽  
Sofc Anode ◽  
The Impact ◽  
Stack Model

In this research, a fully three-dimensional, multiphase, microstructure-scale heterogeneous (non-continuous) electrode, Solid Oxide Fuel Cell (SOFC) stack model is implemented in order to assess the impact of homogeneity disturbance in an SOFC anode. The Butler–Volmer model is combined with recent empirical relations for conductivity and aspects of the Maxwell–Boltzmann kinetic theory describing the transport of mass within the porous medium. Methods for the localized quantification of electrode morphology parameters (such as triple phase boundary length) are implemented. The exchange current distribution in the electrode, the partial pressures and the electric potential fields for each phase are computed numerically. In order to simulate heterogeneity, transfer barriers of varying placement and size are added to an otherwise homogeneous, virtual microstructure based on data from FIB-SEM tomography. The results are compared to a model based on the continuous electrode theory, and the points of discrepancy are highlighted.

Numerical Assessment of SOFC Anode Polarization Based on Three-Dimensional Model Microstructure Reconstructed from FIB-SEM Images

2010 ◽  
Vol 157 (5) ◽  
pp. B665 ◽  
Author(s):  
Naoki Shikazono ◽  
Daisuke Kanno ◽  
Katsuhisa Matsuzaki ◽  
Hisanori Teshima ◽  
Shinji Sumino ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Anode Polarization ◽  
Sem Images ◽  
Numerical Assessment ◽  
Sofc Anode

Distributed Dislocation Method for Determining Elastic Fields of 2D and 3D Volume Misfit Particles in Infinite Space and Extension of the Method for Particles in Half Space

2014 ◽  
Vol 31 (3) ◽  
pp. 249-260
Author(s):  
J. D. Lerma ◽  
T. Khraishi ◽  
S. Kataria ◽  
Y.-L. Shen
Keyword(s):  
Half Space ◽  
Three Dimensional ◽  
Misfit Strain ◽  
Computational Method ◽  
Dislocation Loops ◽  
Host Matrix ◽  
Elastic Fields ◽  
Numerical Assessment ◽  
Distributed Dislocation ◽  
3D Volume

AbstractA multitude of researchers have utilized a variety of techniques to formulate the stresses and deformations caused by volume misfit inclusions in infinite host media. Few of such techniques can also be extended to derive solutions for inclusions in a half space. In this manuscript we present a novel computational method for determining the elastic fields of two and three-dimensional inclusions of arbitrary shape in an infinite host matrix. The misfit strain is treated by a distribution of prismatic dislocation loops. A systematic numerical assessment illustrates that the discretization can yield excellent agreement with existing analytical solutions for certain particle geometries. This method is then further developed to solve for two-dimensional problems in a half space.

Discussion of “Numerical assessment of equivalent diameter equations for prefabricated vertical drains”

2013 ◽  
Vol 50 (7) ◽  
pp. 801-804
Author(s):  
Hui Wu ◽  
Liming Hu
Keyword(s):  
Numerical Model ◽  
Three Dimensional ◽  
Equivalent Diameter ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains ◽  
Numerical Assessment ◽  
Equivalent Equation ◽  
3D Numerical Model ◽  
The Difference ◽  
2D Numerical Model

The Discussion revises the figure that compares different equivalent-diameter equations for prefabricated vertical drains, and the result of another equivalent equation that has been widely used in practice is also added into the figure. In addition, a three-dimensional (3D) numerical model is developed to compare with the two-dimensional (2D) numerical model used in the paper. The result indicates that the difference between the 3D and 2D models can be about 5%.

Recent Developments in Experimental and Numerical Assessments of Welding-Induced Residual Stresses

2018 ◽  
Author(s):  
Bai-Qiao Chen ◽  
Marzieh Hashemzadeh ◽  
Yordan Garbatov ◽  
C. Guedes Soares
Keyword(s):  
Residual Stresses ◽  
Large Scale ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Welded Structures ◽  
Simulation Techniques ◽  
Numerical Assessment ◽  
Welding Sequence ◽  
Recent Developments ◽  
Inherent Deformation

The objective of this work is to present and review the recent developments in the experimental and numerical assessment and simulation techniques on the welding induced distortions and residual stresses. The temperature distribution, welding induced distortion and residual stresses in thin walled welded structures, originating from different experimental tests are reviewed and discussed. Different mathematical models and their numerical applications in representing the heat source are analysed and their advantages and drawbacks are discussed. Thermal stress analyses employing the three-dimensional nonlinear thermo-elasto-plastic approaches and finite element simulations with inherent deformation applicable to large-scale and complex welded structures are also revised and discussed. Discussions on the material properties of the base metal, heat affected zone (HAZ) and weld metal, the effect of the welding sequence, and the pattern of residual stress distribution presented are given a special attention.

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