Question

RCES Problem 7.002 Engine oil at 100°C and a velocity of 0.20 m/s flows over both surfaces of a 1-m-long flat plate maintained at 20°C 001 Determine: (a) The velocity and thermal boundary layer thicknesses at the trailing edge. (b) The local heat flux and surface shear stress at the trailing edge. (c) The total drag force and heat transfer per unit width of the plate. 02 Determine the velocity boundary layer thickness 6 at the trailing edge, in m. Determine the thermal boundary layer thicknesses , at the trailing edge, in m. Determine the magnitude of the local heat flux at the trailing edge, W/m W/m2 Study Determine the local surface shear stress at the trailing edge, in N/m N/m? Determine the total drag force per unit width of the plate, in N/m. D' = N/m Determine the magnitude of the heat transfer per unit width of the plate, in W/m. 4 = W/m Physical Properties Mathematical Functions Click if you would like to show Work for this question: Open Show Work

Answer 1

Properties ergene P 364 kg/n, U 286:1l XI0 6 ml5, kz0.14 W, oil CT0020 = 383K) Pr-108( m-k TReymolds rumber, Reį = UoL - Co CD 86.1x 10-6 ReL= 2322-8 8 The flaw is laminax velocity boundary layer 500 Q322 882 5L Rela 6-0 104 n Thermal boundary layer, 6t 6P-- (0-104)Ios Bt 0010m h=ko 332 Re 140-332 (2322 ss (os hL22.9 W mk locol heat flux at trailing Ge =HCTT)= 22.9 920-100) = -18392 Wlm/ at trailing ge - 864x(0-0-664 (2322-8)" local shear stress 2 ts=Puso.664 Fei "s0.238 Nm2 To tal drn9 force per unit oilth D'RL(U328 Re 2064 a 28)(2322-88 D'0.152 N/m 2h222.99) 4598 m2-K Total heat transfer nte e2LFLCTo=2 C0(4598) Q0-100) 9'E-7356 8 W per unit coid