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Predicting Laminar-Turbulent Transition with Low-Cost Methods

The reliable prediction of laminar-turbulent transition is one of the key physics challenges in the simulation and design of aeronautical components and systems. Transition can have a substantial effect on overall performance and safety margins of airplanes. Historically, transition prediction was based on solving stability equations, which track the evolution of instability modes to the point of non-linear breakdown. Even more fundamental — and thereby substantially more expensive — are methods based on non-linear stability analysis or sufficiently resolved LES/DNS.

Ansys’ development group has focused on the opposite end of the methods spectrum — namely RANS-based approaches. These add minimal computational expense to costly CFD simulations, which are fully compatible with highly parallelized solver technology. This webinar will spotlight such methods and discuss the latest extension of the underlying LCTM (Local-Correlation-based Transition Modeling) concept to an algebraic formulation for the aerospace and defense industry.


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