 Harijono Djojodihardjo 1 , Riyadh I. Ahmed, A.R. Abu-Talib, A.S. Mohd-Rafie, 2015 ANALYICAL AND CFD VISUALIZATION STUDIES OF COANDĂ MAV Harijono Djojodihardjo 1 , Riyadh I. Ahmed, A.R. Abu-Talib, A.S. Mohd-Rafie Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor Darul Ehsan, Malaysia Abstract. To meet the desired mission and design requirements, the basic working relation- ships between various relevant variables and parameters governing the aerodynamics forces in the design of a Coandă MAV should be established. To that end, several tools can be utilized. The first is the analytical tool, which capitalizes on the basic fundamental principles. The second is the utili- zation of Computational Fluid Dynamics (CFD), to provide visualization and significant insight in identifying the relevant problem. Theoretical analysis, and CFD computational and visualization studies will be useful in the preliminary study stage, as well as in designing specific experiments in the conceptual and prototype design stages. Various CFD studies have also indicated that there are still significant discrepancies between CFD and experimental studies, which necessitate the estab- lishment of specific baseline configurations for validation purposes. The present work carries out analysis and CFD visualization studies on the spherical and cylindrical Coandă MAV's. Introduction. Coandă effect and Coandă jet have found many applications in engineering, among others in aircraft and vehicle technology [1-5], as well as wind-turbines [6-7]. In particular, Coandă MAV' share in active developments, and various configurations have been proposed and developed. For the purpose of designing a Coandă MAV which could meet the desired mission and design requirements, it is mandatory to establish the basic working relationships between various relevant variables and parameters governing the aerodynamics forces. To assist the analysis, design and developments of Coandă MAV's, several tools can be resorted to. The first is the analytical tool, which capitalizes on the basic fundamental principles. The second is the utilization of Computation- al Fluid Dynamics, (CFD) which has the advantage of providing visualization for significant insight and identification to the problem at hand, which then can be utilized in enhancing the analysis and identifying specific details. Experimental tools can benefit from the insight gained by analysis, CFD computational and visualization studies, in the preliminary study stage by designing specific exper- iments as well as in the conceptual and prototype design stages. Various CFD studies have also in- dicated that there are still significant discrepancies between CFD and experimental studies [6], which necessitate the existence of specific baseline configurations for validation purposes. Coandă MAV is expected to be capable of maneuvering as illustrated in Figs. 1 (a) and (b), and the analysis carried out here is associated with hovering condition, which should give further insight into its hovering performance. Fig.1: a. An impression of the possible Coandă MAV qualitative performance in comparison to other flight vehicles (adapted from [9]), b. Flight Manoeuvring Structure (adapted from [10]) . 1 Corresponding Author