# 1. In the analytical derivation of external and internal temperature profiles, we assumed thermal…

1. In the analytical derivation of external and internal

temperature profiles, we assumed thermal properties to be independent of

temperature. Is it then correct to say that in such circumstance the

temperature and the velocity fields are independent?

2. Consider heat convection for laminar flow of water in a

pipe. What is the effect of doubling the flow rate on the Nusselt number? What

is the effect of using motor oil instead of water on h?