Abstract
A numerical analysis has been performed for three-dimensional developing turbulent flow in a triangular duct by using a modified Reynolds stress equation model. Govering equations are transformed from the physical plane to the calculation plane by boundary-fitted coordinate systems. The calculated results are compared with the experimental data available. The present method can predict the generation of the secondary flow of the second kind which is a characteristic phenomenon for anisotropic turbulent flow. Moreover, we have shown that the measured normal stress, which is in the perpendicular direction to the base of the triangular duct, contains experimental error.
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