Flow around of airplane is very important for study and these flow do experimental and numerical. In this publication we used fluent comerical software for numerical solve flow around of unmanned airplane. For validation of result, solved flow around of 3D Onera wing that is available result for pressure coefficient , drag coefficient and lift coefficient. After validation of result for Onera wing we use the same numerical simulation for unmanned airplane. Unmanned airplane ARIA design and manufacture in Mechanic department of Isfahan University Technology. In this numerical simulation,we used unstructure mesh for grid and SIMPLE for discritization. In first , invested grid study and boundary condition. In next section,compared inviscid flow and viscid flow.for viscid flow we compare result for five turbulence model and selection best result for final simulation.
