MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Solution of BLE for Internal Flows

The thickness...

Question

The thickness of thermal boundary layer is less than hydrodynamic boundary layer in a laminar flow, when

A

Pr < Nu

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Pr > 1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

Pr < 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Pr > Nu

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Pr > 1
We know the relation

$\frac{δ}{δ_{t}} \approx (P r)^{1 / 3}$

$W h e n P r > 1, δ > δ_{t}$

$P r = 1, δ = δ_{t}$

$P r < 1; δ < δ_{t}$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Relation between hydrodynamic boundary layer thickness

δ

and thermal boundary layer thickness

δ_{t}

, for laminar flow over a flat plate, is

Q. In a laminar flow over plate the thickness of hydrodynamic boundary layer is 2 mm. What will be the thickness of thermal boundary layer? Fluid properties

μ = 4 \times 10^{- 4} k g / m - s, k = 0.664 W / m K, P r = 2.54

Q. For thickness of thermal boundary layer to be greater than thickness of hydrodynamic boundary layer, the Prandtle number should be

Q. Water (Prandtl number =6) flows over a flat plate which is heated over the entire length. Which one of the following relationship between the hydrodynamic boundary layer thickness

(δ)

and thermal boundary layer thickness

(δ_{t})

Q. Maximum thickness of thermal boundary layer formed when the fluid is flowing through the pipe of diameter 10 mm with laminar flow is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Solution of BLE for Internal Flows

OTHER

Watch in App

explore_more_icon

Explore more

Solution of BLE for Internal Flows

Join BYJU'S Learning Program

CrossIcon