Entropy generation in MHD Williamson nanofluid over a convectively heated stretching plate with chemical reaction

Heat Transfer ◽  
2020 ◽  
Vol 49 (4) ◽  
pp. 1982-1999 ◽  
Author(s):  
Tunde A. Yusuf ◽  
Samuel O. Adesanya ◽  
Jacob A. Gbadeyan
Keyword(s):  
Chemical Reaction ◽  
Entropy Generation ◽  
Stretching Plate

Large Eddy Simulation for Prediction of Entropy Generation in a Nonpremixed Turbulent Jet Flame

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Mehdi Safari ◽  
M. Reza H. Sheikhi
Keyword(s):  
Heat Conduction ◽  
Large Eddy Simulation ◽  
Chemical Reaction ◽  
Entropy Generation ◽  
Irreversible Processes ◽  
Filtered Density Function ◽  
Jet Flame ◽  
Eddy Simulation ◽  
Entropy Transport ◽  
Large Eddy

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 which represent irreversibilities due to viscous dissipation, heat conduction, mass diffusion, and chemical reaction. The subgrid scale (SGS) closure is accounted for by the entropy filtered density function (En-FDF) methodology to include complete statistical information about SGS variation of scalars and entropy. The En-FDF provides closed forms for the chemical reaction effects. The methodology is applied for LES of Sandia Flame D and predictions are validated against experimental data. Entropy statistics are shown to compare favorably with the data. All individual irreversible processes in this flame are predicted and analyzed. It is shown that heat conduction and chemical reaction are the main sources of entropy generation in this flame.

Impact of Entropy Generation on Stagnation-Point Flow of Sutterby Nanofluid: A Numerical Analysis

2016 ◽  
Vol 71 (9) ◽  
pp. 837-848 ◽  
Author(s):  
Ehtsham Azhar ◽  
Z. Iqbal ◽  
E.N. Maraj
Keyword(s):  
Boundary Layer ◽  
Differential Equations ◽  
Stagnation Point ◽  
Entropy Generation ◽  
Computational Analysis ◽  
Similarity Transformation ◽  
Nonlinear Partial Differential Equations ◽  
Stagnation Point Flow ◽  
Physical Parameters ◽  
Stretching Plate

AbstractThe present article dicusses the computational analysis of entropy generation for the stagnation-point flow of Sutterby nanofluid over a linear stretching plate. The Sutterby fluid is chosen to study the effect for three major classes of non-Newtonian fluids, i.e. pseudoplastic, Newtonian, and dilatant. The effects of pertinent physical parameters are examined under the approximation of boundary layer. The system of coupled nonlinear partial differential equations is simplified by incorporating suitable similarity transformation into a system of non-linear-coupled ordinary differential equations. Entropy generation analysis is conducted numerically, and the results are displayed through graphs and tables. Significant findings are listed in the closing remarks.

scholarly journals Estimation of entropy generation in Carreau-Yasuda fluid flow using chemical reaction with activation energy

2020 ◽  
Vol 9 (5) ◽  
pp. 9951-9964 ◽  
Author(s):  
Muhammad Ijaz Khan ◽  
Faris Alzahrani ◽  
Aatef Hobiny ◽  
Zulfiqar Ali
Keyword(s):  
Activation Energy ◽  
Fluid Flow ◽  
Chemical Reaction ◽  
Entropy Generation
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