Heat Transfer

Question 1

Convection resistance is also called _______________

Answer 1

film thermal resistance. Calculated from Film co-efficient

Question 2

Prandtl Number

Answer 2

Ratio of momentum diffusion to thermal diffusion

Question 3

Nusselt number for cylinder in air cross flow

Answer 3

C x Re^n x Pr^1/3 … Pr^1/3 = 1 for air

C x Re^n

Question 4

Rayleigh Number

Answer 4

Grashof no x Prandtl no