Abstract
The flow past multi-element wing configurations is difficult to simulate numerically for a variety of reasons. The numerical modeling challenges grid generation strategies for both structured and unstructured type meshes and demands resolution of flows in tight spaces where the flow is highly rotational and the resultant vortices interact strongly with the main flow. The presence of the confluent boundary layers from different upstream components impinge and mix with local viscous flows and stretch the limits of turbulence models, most of which have been designed to address normal development of transitional/turbulent flows. The paper reports on a collaborative exercise whereby both organizations of NRC and Bombardier) put their CFD codes to test and identify the strengths, and weakness of their individual capabilities. The associated validation data too was obtained jointly from IAR 2D High Reynolds number facility. Owing to the limited amount of data. available, the exercise mainly concentrated on pressure distribution studies. A more detailed viscous study in terms of velocity profiles and other viscous boundary layer predictions would be the ultimate test.