Question

As the thermal boundary layer thickness increases, the convective heat transfer coefficient will: Option 1: Decrease Option 2: Increase Option 3: Remain constant Option 4: Go to infinity

Answer 1

As the thermal boundary layer thickness increases, the convective heat transfer coefficient will decrease.

Answer 2

Option 1: Decrease

Step-by-step explanation:

As boundary layer thickness increases, dT/dC becomes little. It means that temperature drive forces becoming lower with thickness increased. So the heat transfer coefficient decreases.