Mathematical modeling and study of MHD flow of Williamson nanofluid over a nonlinear stretching plate with activation energy

Heat Transfer ◽  
2020 ◽  
Author(s):  
Abdullah Dawar ◽  
Zahir Shah ◽  
Saeed Islam
Keyword(s):  
Mathematical Modeling ◽  
Activation Energy ◽  
Mhd Flow ◽  
Stretching Plate ◽  
Nonlinear Stretching

scholarly journals Soret-Dufour Effects on the MHD Flow and Heat Transfer of Microrotation Fluid over a Nonlinear Stretching Plate in the Presence of Suction

2013 ◽  
Vol 04 (06) ◽  
pp. 864-875
Author(s):  
Md Abdullah Al Mahbub ◽  
Nasrin Jahan Nasu ◽  
Shomi Aktar ◽  
Zillur Rahman
Keyword(s):  
Heat Transfer ◽  
Mhd Flow ◽  
Flow And Heat Transfer ◽  
Stretching Plate ◽  
Nonlinear Stretching

scholarly journals MODELING OF HYDROCHEMICAL OXIDATION OF HEAZLEWOODITE WITH NITRIC ACID

2020 ◽  
pp. 65-72
Author(s):  
Анна Игоревна Пичугина ◽  
Ирина Геннадьевна Критова
Keyword(s):  
Mathematical Modeling ◽  
Activation Energy ◽  
Nitric Acid ◽  
Nickel Sulfide ◽  
Nitric Acid Concentration ◽  
Rotating Disk ◽  
Limiting Stage ◽  
Specific Speed ◽  
Modes Of Interaction ◽  
Disk Method

В работе представлены результаты математического моделирования окислительного растворения хизлевудита в растворах азотной кислоты в условиях равнодоступной поверхности вращающегося диска с применением метода полного факторного эксперимента. Получены и проанализированы зависимости скорости процесса гидрохимического окисления сульфида никеля (W, моль/смс) от продолжительности взаимодействия (τ, с), влияния концентрации азотной кислоты (С, моль/дм), частоты вращения диска (ω, с) и температуры (Т, К). Определены основные кинетические параметры: константа скорости и эффективная энергия активации процесса. Установлены режимы взаимодействия хизлевудита с азотной кислотой, выявлены вероятные лимитирующие стадии взаимодействия. The paper presents the results of mathematical modeling of the oxidative dissolution of hizlewudite in solutions of nitric acid using the rotating disk method and the factor experimental design. The dependences of specific speed of dissolution of sulfide of nickel Nickel sulfide (W, mol/cmc) on the duration of interaction (τ, s), the influence of nitric acid concentration (C, mol/dm), frequencies of rotation disk (ω, s) and temperatures (T, K) were obtained and analyzed. The main kinetic parameters are determined: the rate constant and the activation energy of the process. Established modes of interaction heazlewoodite with nitric acid, identified probable limiting stage of the interaction.

Modeling and theoretical investigation of curved parabolized surface of second-order velocity slip flow: Combined analysis of entropy generation and activation energy

2020 ◽  
Vol 34 (33) ◽  
pp. 2050383
Author(s):  
Sumaira Qayyum ◽  
M. Ijaz Khan ◽  
Wathek Chammam ◽  
W. A. Khan ◽  
Zulfiqar Ali ◽  
...  
Keyword(s):  
Activation Energy ◽  
Entropy Generation ◽  
Fluid Velocity ◽  
Slip Flow ◽  
Mhd Flow ◽  
Velocity Slip ◽  
Second Order ◽  
Bejan Number ◽  
Biot Numbers ◽  
Chemical Reaction Parameter

Here our purpose is to explore the entropy generation in nanofluid MHD flow by curved stretching sheet; second-order slip is considered. Additional effects of viscous dissipation, Joule heating, and activation energy are taken. Temperature and concentration boundary conditions are considered convectively. For convergence of series solution NDSolve MATHEMATICA is used. Velocity, Bejan number, concentration, temperature, and entropy generation graphs are sketched for important parameters. For greater estimations of first- and second-order velocity slip parameters fluid velocity reduces. The thermal and solutal Biot numbers enhance the temperature and concentration, respectively. The concentration also has direct relation with activation energy. Entropy generation reduces for chemical reaction parameter and first- and second-order slip parameters.

Spectral Quasi-Linearization Methods for Powell-Eyring MHD Flow Over a Nonlinear Stretching Surface

2018 ◽  
Vol 7 (5) ◽  
pp. 917-927 ◽  
Author(s):  
Mlamuli Dhlamini ◽  
Hiranmoy Mondal ◽  
Precious Sibanda ◽  
Sandile Motsa
Keyword(s):  
Mhd Flow ◽  
Stretching Surface ◽  
Linearization Methods ◽  
Nonlinear Stretching
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