Q$19.$

$($i$)$ Wind at $50$ km$-$hr$-1$ is blowing lengthways and parallel to the wall of a house of

length $10$ m and height $3$ m$.$ If the surface temperature of the wall is $10$C and the

surrounding air is $0$C$,$ determine the rate of convection heat transfer from the wall to

the surroundings. $(7$ marks$).$

$($ii$)$ If a laminar flow regime only was to occur over the entire house wall, what would

be the maximum permissible Reynolds Number? Explain. $(3$ marks$).$