### 4.1.9. Explicit Algebraic Reynolds Stress Model

Explicit algebraic Reynolds stress models (EARSM) represent an extension of the standard two-equation models. They are derived from the Reynolds stress transport equations and give a nonlinear relation between the Reynolds stresses and the mean strain-rate and vorticity tensors. Due to the higher order terms many flow phenomena are included in the model without the need to solve transport equations. The EARSM is an extension of the current and BSL model to capture effects of secondary flows and of flows with streamline curvature and system rotation. For details, see Explicit Algebraic Reynolds Stress Model in the CFX-Solver Theory Guide.

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