_____________________________________________________________________________________________________ *Corresponding author: E-mail: shonhiwachipo@gmail.com, cshonhiwa@ufh.ac.za; Phys. Sci. Int. J., vol. 27, no. 6, pp. 75-90, 2023 Physical Science International Journal Volume 27, Issue 6, Page 75-90, 2023; Article no.PSIJ.110721 ISSN: 2348-0130 Determination of Optimal Geometry for an Empty Concentrator Augmented Wind Turbine Chipo Shonhiwa a* , Golden Makaka a , Patrick Mukumba a and Ngwarai Shambira a a Physics Department, University of Fort Hare, 1 King Williams Town Road, Private Bag X1314, Alice 5700, South Africa. Authors’ contributions This work was carried out in collaboration among all authors. Author CS did the conceptualization, methodology, formal analysis and writing-original draft preparation. Author NS did the writing-review and editing, methodology and formal analysis. Authors PM and GM did the writing-review, editing, methodology, formal analysis, supervision, and funding acquisition. All authors read and approved the final manuscript. Article Information DOI: 10.9734/PSIJ/2023/v27i6815 Open Peer Review History: This journal follows the Advanced Open Peer Review policy. Identity of the Reviewers, Editor(s) and additional Reviewers, peer review comments, different versions of the manuscript, comments of the editors, etc are available here: https://www.sdiarticle5.com/review-history/110721 Received: 05/11/2023 Accepted: 22/12/2023 Published: 29/12/2023 ABSTRACT Aims: To determine the optimal concentrator geometrical parameters of an empty concentrator augmented wind turbine (CAWT), which are used to design and install CAWTs. Place and Duration of Study: Physics Department, University of Fort Hare, South Africa between March 2023, and October 2023. Methodology: The study used the concentrator length (L) to concentrator outlet diameter ratio ( L r ) and the difference between inlet and outlet radii to concentrator outlet diameter ratio ( R r ) to investigate the effect of concentrator geometry on wind velocity augmentation and air dynamics to determine the optimum concentrator geometrical parameters using computational fluid dynamics modelling. The modelled concentrators’ geometry was created in SolidWorks, prepared for meshing in SpaceClaim, meshed, and analysed in Fluent to solve the Reynolds-averaged Navier-Stokes Original Research Article