Water flows through a rectangular channel. The channel cross section is 2 cm × 4 cm. The water mean velocity and mean temperature are 7.5 m/s and 300 K, respectively. The wall temperature is 350 K....

Water flows through a rectangular channel. The channel cross section is 2 cm × 4 cm. The water mean velocity and mean temperature are 7.5 m/s and 300 K, respectively. The wall temperature is 350 K. Calculate the wall heat flux by using an appropriate empirical correlation and an appropriate correlation based on analogy between heat and momentum transfer.