Consider a cylinder in the wind tunnel of the thermal fluid laboratory. The cylinder is about 10.5 inches long and has a diameter of 1.891 inch. The cross section of

the duct is 10.5 inches wide and 15.75 inches high. The length of the test section is 42 inches and the cylinder is located approximately 16 inches downstream of the entrance to the test section. Now the three dimensional problem is simplified as two dimensional problem (Figure 1). The computational domain covers the whole duct. Q1: the Reynolds number is defined as ReD=PUD/u where D is the diameter of the cylinder, U is the inlet velocity. Set up the case that has Reynolds number of 25. Make sure that the convergence tolerances are IE-5. Mesh size 10 mm with level 3 refinement around the cylindrical obstacle and on the wall. Initialize the problem and solve it. Provide the following results: (a) Number of iterations needed for convergence. (b) Drag coefficient (c) Contour plot of velocity magnitude. (d) Pathline plot (e) x velocity profiles along the following five vertical lines: at the center of the cylinder (x=0),x= -50 mm, x= -26 mm, x = 50 mm, x= 400 mm, as approximately shown below.