# ch02 - Introduction to Fluid Mechanics 7th Edition Fox...

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Introduction to Fluid Mechanics 7 th Edition Fox, Pritchard, & McDonald Answers to Selected Problems, Chapter 2 2.1 1) 1D, Unsteady 2) 1D, Steady 3) 2D, Unsteady 4) 2D, Unsteady 5) 1D, Unsteady 6) 3D, Steady 7) 2D, Unsteady 8) 3D, Steady 2.3 Streamlines: x c y = 2.5 Streamlines: t a b x c y = 2.7 Streamlines: + = c x a b y 2 1 2.9 Streamlines: y = 3 x Δ t = 0.75 s 2.11 Streamlines: x 2 + y 2 = c 2.13 Pathlines: y = 2/ x Streamlines: y = 2/ x 2.15 a K π ω 2 = 2.17 Pathlines: t C e y y 0 = , ( ) 2 2 1 0 At t B e x x + = Streamlines: t x y 5 . 0 1 1 + = 2.19 Pathlines: t b e y y = 0 , 2 2 1 0 at e x x = Streamlines: t a b Cx y = 2.21 Pathlines: 1 4 + = t y , 2 05 . 0 3 t e x = Streamlines: + = 3 ln 40 1 x t y 2.23 Streamlines: ( ) ( )( ) 0 0 0 sin t t t v t y = ω , ( ) ( ) 0 0 0 t t u t x = 2.25 Streaklines: ( ) τ = t e y , ( ) ( ) 2 2 1 . 0 τ τ + = t t e x Streamlines: ( ) t x y 2 . 0 1 1 + = 2.29 Streamlines: 4 4 2 + = x y (4 m, 8 m) (5 m, 10.25 m) 2.31 (2.8 m, 5 m) (3 m, 3 m) 2.33 T S T b + = 1 2 3 ν b ´ = 4.13 x 10 9 m 2 /s·K 3/2 S ´ = 110.4 K 2.35 τ yx = 4.56 N/m 2 2.39 a = 0.491 ft/s 2 2.41 L = 2.5 ft 2.43 t = 1.93 s 2.45

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