Sharif University of Technology Scientia Iranica 1026-3098 27 5 2020 10 01 Novel aspects of Soret and Dufour in entropy generation minimization for Williamson fluid flow 2451 2464 21395 10.24200/sci.2019.52553.2772 EN T. Hayat Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan.; Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia. F. Masood Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan. S. Qayyum Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan. M. Ijaz Khan Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan. A. Alsaedi Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia. Journal Article 2018 12 27 Soret and Dufour effects on MHD flow of Williamson fluid between two rotating disks are examined. Impacts of stratification, viscous dissipation and activation energy are also considered. Bejan number and entropy generation for stratified flow is discussed. The governing PDE's are converted into ODE's by using Von Kármán transformations. Convergent solution of complicated ODE's is found by homotopic procedure. The results of physical quantities are discussed through plots and numerical values. It is noted that axial and radial velocities are more for greater Weissenberg number. Temperature and concentration profiles are decreasing functions of thermal and solutal stratification parameters respectively. Entropy and Bejan number show the opposite trends for higher Weissenberg number and Brinkman number. https://scientiairanica.sharif.edu/article_21395_69726edffb77c960d05785f5c26de5d5.pdf