LES of Recirculating Flow Without Any Homogeneous Direction : A Dynamic One-Equation Subgrid Model

Standard dynamic subgrid models have numerical stability problems. The remedy is to average in some homogeneous flow direction(s) or to introduce some artificial clipping. Thus this type of models do not seem to be applicable to real three-dimensional flow without introducing ad hoc user modifications. In the present study a first attempt to formulate a new one-equation subgrid model is presented which reduces the need of this type of user-modifications. The model is applied to recirculating flow in an enclosure.

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