CFD validation issues in transition modeling
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1996 American institute of Aeronautics and Astronautics, Inc. All rights reserved. Laminar-turbulent transition is highly initialcondition and operating-condition dependent. Finding careful, archival experiments for comparison is the main validation issue; few exist. The CFD formulations validated to date demonstrate that if the environment and operating conditions can be modelled and input correctly, the computations (nonlinear PSE and DNS) agree quantitatively with the experiments. Future challenges for validation include: Successful CFD simulations of available complete databases; CFD leadership in the identification, cataloging, and modeling of the effects of freestream disturbances; CFD leadership in the determination of relevant validation experiments for supersonic and hypersonic flows; careful validation experiments and CFD solutions for complex 3-D geometries; and simulations and validations for the high Reynolds numbers of flight.