_____________________________________________________________________________________________________ *Corresponding author: E-mail: rnmondal71@yahoo.com; Current Journal of Applied Science and Technology 23(2): 1-18, 2017; Article no.CJAST.31612 Previously known as British Journal of Applied Science & Technology ISSN: 2231-0843, NLM ID: 101664541 Pressure-driven Flow Instability with Convective Heat Transfer through a Rotating Curved Square Duct with Strong Curvature Md. Arifuzzaman 1 , Muhammad Minarul Islam 2 , Sanjit Kumar Paul 3 and Rabindra Nath Mondal 4* 1 Department of General Educational Development, Faculty of Science and Information Technology, Daffodil International University, Dhaka, Bangladesh. 2 Department of Mathematics, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalgonj, Bangladesh. 3 Department of Basic Sciences and Humanities, University of Asia Pacific, Dhaka, Bangladesh. 4 Department of Mathematics, Jagannath University, Dhaka-1100, Bangladesh. Authors’ contributions This work was carried out in collaboration by all authors. Author MA designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Authors MMI and SKP managed the analyses of the study. Author RNM managed the literature searches and made final correction in the paper. This author supervised the whole study. All authors read and approved the final manuscript. Article Information DOI: 10.9734/CJAST/2017/31612 Editor(s): (1) Pengtao Sun, University of Nevada Las Vegas, 4505 Maryland Parkway, USA. Reviewers: (1) Salman Saleem, National University of Computer & Emerging Sciences, Pakistan. (2) Saurabh Kapoor, Regional Institute of Education(NCERT), India. (3) R. Muthucumaraswamy, Sri Venkateswara College of Engineering, India. (4) Mohamed Ahmed Hassan Gaber, Ain Shams University, Egypt. Complete Peer review History: http://www.sciencedomain.org/review-history/20582 Received 16 th January 2017 Accepted 19 th July 2017 Published 21 st August 2017 ABSTRACT The present paper investigates pressure-driven flow instability with convective heat transfer through a rotating curved square duct with curvature ratio 0.5. Spectral method is used as a basic tool to solve the system of non-linear partial differential equations. The outer wall of the duct is heated while the inner wall cooled, the top and bottom walls being thermally insulated. The duct is rotated in both the positive and negative direction, and investigated combined effects of centrifugal, Coriolis Original Research Article