engineering recuitment BHEL Engineer Trainee Mock Test 2025 Heat Transfer Convection Dimensionless Numbers
Consider a fully developed flow in a circular pipe of diameter 20 cm with an average velocity of 1 m/s. The fluid flowing in the pipe has a kinematic viscosity of 0.00016 m2/s and thermal conductivity of 2.0 W/m-K. The heat transfer coefficient for constant heat flux and constant wall temperature boundary conditions are, respectively
1
36.6 and 43.6 W/m2K
2
43.6 and 36.6 W/m2K
3
6.6 W/m2K for both the cases
4
43.6 W/m2K for both the cases