Zobrazeno 1 - 10
of 14
pro vyhledávání: '"M. Reza H. Sheikhi"'
Publikováno v:
Entropy, Vol 16, Iss 10, Pp 5159-5177 (2014)
An overview is presented of the recent developments in the application of large eddy simulation (LES) for prediction and analysis of local entropy generation in turbulent reacting flows. A challenging issue in such LES is subgrid-scale (SGS) modeling
Externí odkaz:
https://doaj.org/article/c00d070c99744b96b6802bba0c1605fa
Publikováno v:
Entropy, Vol 12, Iss 3, Pp 434-444 (2010)
The transport equation of entropy is introduced in large eddy simulation to perform exergy analysis of turbulent combustion systems. The sources of exergy destruction can be evaluated by analyzing entropy generation terms, which appear in unclosed fo
Externí odkaz:
https://doaj.org/article/cf8104b538ed48308d66c88d54ab4602
Autor:
Mehdi Safari, M. Reza H. Sheikhi
Publikováno v:
Energy. 78:451-457
LES (large eddy simulation) is employed for prediction and analysis of entropy generation in turbulent combustion. The entropy transport equation is considered in LES. This equation contains several unclosed entropy generation terms corresponding to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::849da47e789d8a424c719bb9bd3ded7f
https://doi.org/10.1016/j.energy.2014.10.032
https://doi.org/10.1016/j.energy.2014.10.032
Publikováno v:
Journal of Non-Equilibrium Thermodynamics. 41
The rate-controlled constrained-equilibrium (RCCE) method is employed to study the interactions between mixing and chemical reaction. Considering that mixing can influence the RCCE state, the key objective is to assess the accuracy and numerical perf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9f97fccbdb483677aafcd8151e6aa8b
https://doi.org/10.1515/jnet-2015-0052
https://doi.org/10.1515/jnet-2015-0052
Publikováno v:
Volume 6B: Energy.
In this study, constraint potential and constraint forms of the Rate-Controlled Constrained-Equilibrium (RCCE) method have been investigated in terms of accuracy and performance. Although the two formulations are equivalent mathematically, they show
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74a0fb00c922b20ecc9991e13bb05aa3
https://doi.org/10.1115/imece2015-52317
https://doi.org/10.1115/imece2015-52317
Autor:
M. Reza H. Sheikhi, Fatemeh Hadi
Publikováno v:
Journal of Energy Resources Technology. 138
A comparative assessment is made of two implementations of the rate-controlled constrained-equilibrium (RCCE) method. These are the constraint and constraint potential formulations in which rate equations are solved for the RCCE constraints and const
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c1fa655996311417b488c57393f980c
https://doi.org/10.1115/1.4031614
https://doi.org/10.1115/1.4031614
Publikováno v:
Volume 8B: Heat Transfer and Thermal Engineering.
A series of systematic computational studies have been conducted for transonic HPT nozzles and blades to evaluate the impact of free stream turbulence on boundary layer growth and downstream wake mixing. Transition modeling is first compared to measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bec1d263f84cdf44e6c7e2888ea63b1
https://doi.org/10.1115/imece2014-38620
https://doi.org/10.1115/imece2014-38620
Autor:
M. Reza H. Sheikhi, Mehdi Safari
Publikováno v:
Journal of Energy Resources Technology. 136
Local entropy generation in a turbulent nonpremixed jet flame (Sandia Flame D) is predicted using large eddy simulation (LES) with inclusion of entropy transport. The filtered form of entropy transport equation contains several unclosed source terms
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ff292c2c11ea0c76d5dae38615973d9
https://doi.org/10.1115/1.4025974
https://doi.org/10.1115/1.4025974
Autor:
Mehdi Safari, M. Reza H. Sheikhi
Publikováno v:
Volume 1: Fuels and Combustion, Material Handling, Emissions; Steam Generators; Heat Exchangers and Cooling Systems; Turbines, Generators and Auxiliaries; Plant Operations and Maintenance.
Analysis of local entropy generation or exergy destruction is an effective means to investigate sources of efficiency loss to optimize the performance of energy and combustion systems. The local entropy production is predicted using large eddy simula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50e060e467334db9416dda4b9fc3a5b1
https://doi.org/10.1115/power2013-98276
https://doi.org/10.1115/power2013-98276
Publikováno v:
Journal of Energy Resources Technology. 135
The principle of detailed balance is shown to be a sufficient condition for the second law of thermodynamics in thermally equilibrated elementary chemical reactions. For an elementary reaction, the principle of detailed balance relates the forward an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d565d42ab10b2203ff177c4e11c849ee
https://doi.org/10.1115/1.4024221
https://doi.org/10.1115/1.4024221