Question

1. A thick metal plate (alpha = 3.5 x 10^-6 m²/s and k = 0.7 W/m-K), initially at a uniform temperature of 100^oC, is suddenly exposed to a convection environment of water at 20^oC, giving a very large convection coefficient.

a. Sketch the surface heat flux, q", as a function of time

b. Using an explicit numerical scheme with a time step of 60 s, calculate the time required for the temperature to change 80 mm from the surface.

Answer 1

some data were missing in the question but by knowing these values we can put them into the equation i written in the solution and can know the exact answer.