The turbulent flow around the Huygens probe is characterized by effects such as flows curvature and separation that introduce changes in the turbulence structure, thus invalidating many of the turbulence models widely used for "simple shear flows." In this work the predictions of the standard k-epsilon model, and the Shih et al. (1993) model are compared with an algebraic model developed by the present authors. This algebraic stress model is a way of accounting for the anisotropy of Reynolds stresses without going to the full length of solving the Reynolds stress transport equations. The aim is to establish which models better evaluate the flow around the Huygens probe during the descent phase. The predictions of the axial force coefficient supplied by the model presented below correlate with the experimental data better than the standard k-epsilon model and the Shih et al. model.
Turbulent flow around the Huygens probe: A comparison of algebraic Reynolds stress models
MASI, MASSIMO;
2002
Abstract
The turbulent flow around the Huygens probe is characterized by effects such as flows curvature and separation that introduce changes in the turbulence structure, thus invalidating many of the turbulence models widely used for "simple shear flows." In this work the predictions of the standard k-epsilon model, and the Shih et al. (1993) model are compared with an algebraic model developed by the present authors. This algebraic stress model is a way of accounting for the anisotropy of Reynolds stresses without going to the full length of solving the Reynolds stress transport equations. The aim is to establish which models better evaluate the flow around the Huygens probe during the descent phase. The predictions of the axial force coefficient supplied by the model presented below correlate with the experimental data better than the standard k-epsilon model and the Shih et al. model.
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