Repeat Prob. 15–28, except for turbulent flow of air with a uniform inlet velocity of 10.0 m/s. In addition, set the turbulence intensity at the inlet to 10 percent with a turbulent length scale of 0.5 m. Use the k-e turbulence model with wall functions. Set the outlet pressure at both outlets to the same value, and calculate the pressure drop through the wye. Also calculate the percentage of the inlet flow that goes out of each branch. Generate a plot of streamlines. Compare results with those of laminar flow (Prob. 15–28).

Data from Problem 15-28

Choose one of the grids generated in Prob. 15–27, and run a CFD solution for laminar flow of air with a uniform inlet velocity of 0.02 m/s. Set the outlet pressure at both outlets to the same value, and calculate the pressure drop through the wye. Also calculate the percentage of the inlet flow that goes out of each branch. Generate a plot of streamlines.

Data from Problem 15-27.

Consider the two-dimensional wye of Fig. P15–27. Dimensions are in meters, and the drawing is not to scale. Incompressible flow enters from the left, and splits into two parts. Generate three coarse grids, with identical node distributions on all edges of the computational domain: 

Structured multiblock grid, 

Unstructured triangular grid, 

Unstructured quadrilateral grid. 

Compare the number of cells in each case and comment about the quality of the grid in each case.

FIGURE P15–27

Transcribed Image Text:

(0, 1) (0, 0) (2, 1) (2.5, 0.5) (4.5, 3.5) (5,3) (5, 0.5) (5,0)