Question

The heat transfer coefficient decreases with increasing x for both the laminar and turbulent regions a. True b. False

Answer 1

A) True

Step-by-step explanation:

Yes this is true when length is creases the heat transfer coefficient decease with length.

The heat transfer(h) coefficient is varying with x by given expression

For Laminar flow

`h \alpha \frac{1}{x^{(1)/(2)}}`

For turbulent flow

`h \alpha \frac{1}{x^{(1)/(5)}}`

But when flow is in transitional state the heat heat transfer(h) coefficient is increases with x.But for laminar as well as turbulent flow h is decrease when x increases.