Electromagnetic flow of SWCNT/MWCNT suspensions with optimized entropy generation and cubic auto catalysis chemical reaction

2020 ◽  
pp. 104996
Author(s):  
M.K. Nayak ◽  
F. Mabood ◽  
A.S. Dogonchi ◽  
W.A. Khan
Keyword(s):  
Chemical Reaction ◽  
Entropy Generation ◽  
Electromagnetic Flow

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.

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

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

scholarly journals Entropy Generation in MHD Mixed Convection Non-Newtonian Second-Grade Nanoliquid Thin Film Flow through a Porous Medium with Chemical Reaction and Stratification

Entropy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 139 ◽  
Author(s):  
Noor Khan ◽  
Zahir Shah ◽  
Saeed Islam ◽  
Ilyas Khan ◽  
Tawfeeq Alkanhal ◽  
...  
Keyword(s):  
Thin Film ◽  
Mass Transfer ◽  
Porous Medium ◽  
Mixed Convection ◽  
Chemical Reaction ◽  
Entropy Generation ◽  
Film Flow ◽  
Second Grade ◽  
Thin Film Flow ◽  
Flow Through

Chemical reaction in mixed convection magnetohydrodynamic second grade nanoliquid thin film flow through a porous medium containing nanoparticles and gyrotactic microorganisms is considered with entropy generation. The stratification phenomena, heat and mass transfer simultaneously take place within system. Microorganisms are utilized to stabilize the suspended nanoparticles through bioconvection. For the chemical reaction of species, the mass transfer increases. The governing equations of the problem are transformed to nonlinear differential equations through similarity variables, which are solved through a well known scheme called homotopy analysis method. The solution is expressed through graphs and illustrations which show the influences of all the parameters. The residual error graphs elucidate the authentication of the present work.

Entropy Generation with nonlinear heat and Mass transfer on MHD Boundary Layer over a Moving Surface using SLM

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
M. M. Bhatti ◽  
M. M. Rashidi ◽  
I. Pop
Keyword(s):  
Boundary Layer ◽  
Chemical Reaction ◽  
Entropy Generation ◽  
Skin Friction Coefficient ◽  
Momentum Equation ◽  
Physical Parameters ◽  
Numerical Comparison ◽  
Moving Surface ◽  
Mhd Boundary Layer ◽  
The Impact

AbstractIn this article, entropy generation with combined effects of thermal radiation and chemical reaction on MHD boundary layer over a moving surface has been investigated. The governing flow comprises of linear momentum equation, energy, and concentration equations which are modified with the help of similarity variables. The reduced resulting nonlinear coupled ordinary differential equations are solved with the help of Successive linearization method (SLM) and Chebyshev spectral collocation method. The impact of all the physical parameters is demonstrated numerically and graphically. A detailed analysis have been given for all the pertinent parameters such as Hartmann number, porosity parameter, Prandtl number, radiation parameter, suction/injection parameter, moving parameter, Brinkmann number, Reynolds number, chemical reaction parameter and Schmidt number on velocity, temperature, concentration and entropy profile as well as the Skin friction coefficient, Nusselt number and Sherwood number are also conducted. The numerical comparison has also been given to the existing published literature.

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