Abstract
A numerical analysis has been performed on developing turbulent flow in a circular pipe containing two rods located off-center. In calculation, an algebraic stress model was adopted in order to predict Reynolds stresses precisely, and the boundary-fitted coordinate system was introduced as the method of the coordinate transformation. Calculated results were compared with the experimental data available. The calculated profiles of secondary flow and Reynolds stresses for developing turbulent flow were investigated in detail. As a result of this calculation, it was found that the calculated distributions of the streamwise velocity and friction velocity are predicted well within 3% error range. Although the secondary flow along the wall of the outer circular pipe is not observed in the experimental data, the calculated result suggested that its secondary flow is generated by anisotropic turbulent in the region between off-center rod and circular pipe. The generation mechanism for its secondary flow was presented by evaluating the production terms in vorticity equation quantitatively. But more active research is necessary to make clear whether the predicted secondary flow exists or not.
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