This paper presents an ambitious Computational Fluid Dynamics (CFD) grand challenge problem, including a proposed set of increasingly complex and connected challenge problems, to advance the technological state-of-the-art in the numerical prediction of commercial airplane low-speed, high-lift aerodynamic characteristics and performance. It describes the critical need for a vastly improved computational capability for high-lift airplane design, system development, and product certification, highlights current technology gaps and shortcomings, and details key research and development focus areas where significant progress is required. A key goal of this effort is to energize the aerospace CFD/Aerodynamics communities by coordinating and collaborating across multiple levels of government, industry, academia, and other technology providers to accelerate the use of efficient and robust computational tools to ultimately create products with increased aerodynamic performance that are environmentally cleaner, more fuel efficient, and ensure safe flight while reducing non-recurring product development cost and risk.
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