Nusselt number for thermal entry region Calculator

✖The Reynolds Number Dia is a dimensionless quantity used to predict flow patterns in fluid mechanics, specifically for turbulent flow in pipes based on diameter.ⓘ Reynolds Number Dia [Re_D]

+10%

-10%

✖The Nusselt Number is a dimensionless quantity that represents the ratio of convective to conductive heat transfer in fluid flow, indicating the efficiency of heat transfer.ⓘ Nusselt number for thermal entry region [Nu]

⎘ Copy

👎

Formula

Reset

👍

Download Internal Flow Formula PDF PDF Image

Nusselt number for thermal entry region Solution

STEP 0: Pre-Calculation Summary

Formula Used

Nusselt Number = 3.0*Reynolds Number Dia^0.0833
Nu = 3.0*Re_D^0.0833
This formula uses 2 Variables

Variables Used

Nusselt Number - The Nusselt Number is a dimensionless quantity that represents the ratio of convective to conductive heat transfer in fluid flow, indicating the efficiency of heat transfer.
Reynolds Number Dia - The Reynolds Number Dia is a dimensionless quantity used to predict flow patterns in fluid mechanics, specifically for turbulent flow in pipes based on diameter.

STEP 1: Convert Input(s) to Base Unit

Reynolds Number Dia: 1600 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Nu = 3.0*Re_D^0.0833 --> 3.0*1600^0.0833

Evaluating ... ...

Nu = 5.54656937343187

STEP 3: Convert Result to Output's Unit

5.54656937343187 --> No Conversion Required

FINAL ANSWER

5.54656937343187 ≈ 5.546569 <-- Nusselt Number

(Calculation completed in 00.004 seconds)

You are here -

Home » Physics » Heat and Mass Transfer » Internal Flow » Flow inside tubes » Mechanical » Turbulent Flow » Nusselt number for thermal entry region

Credits

Created by Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

Nishan Poojary has created this Calculator and 500+ more calculators!

Verified by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

Rajat Vishwakarma has verified this Calculator and 400+ more calculators!

< Turbulent Flow Calculators

Friction factor for rough tubes

Go Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2)

Friction factor for Re greater than 2300

Go Friction Factor = 0.25*(1.82*log10(Reynolds Number Dia)-1.64)^-2

Friction factor for Re greater than 10000

Go Friction Factor = 0.184*Reynolds Number Dia^(-0.2)

Friction factor for transitional turbulent flow

Go Friction Factor = 0.316*Reynolds Number Dia^-0.25

Nusselt number for thermal entry region Formula

Nusselt Number = 3.0*Reynolds Number Dia^0.0833
Nu = 3.0*Re_D^0.0833

What is Thermal Entry Region?

The thermal entry region is the initial section of a flow passage where the temperature profile of a fluid adjusts as it begins to exchange heat with the surface. In this region, the thermal boundary layer develops, gradually stabilizing until the temperature distribution becomes fully developed. This concept is important in heat transfer analysis to design efficient systems, ensuring optimal heat exchange in ducts, pipes, and channels.

How to Calculate Nusselt number for thermal entry region?

Nusselt number for thermal entry region calculator uses Nusselt Number = 3.0*Reynolds Number Dia^0.0833 to calculate the Nusselt Number, The Nusselt number for thermal entry region formula is defined as a measure of the ratio between heat transfer by convection (α) and heat transfer by conduction alone. Nusselt Number is denoted by Nu symbol.

How to calculate Nusselt number for thermal entry region using this online calculator? To use this online calculator for Nusselt number for thermal entry region, enter Reynolds Number Dia (Re_D) and hit the calculate button. Here is how the Nusselt number for thermal entry region calculation can be explained with given input values -> 5.546569 = 3.0*1600^0.0833.

FAQ

What is Nusselt number for thermal entry region?

The Nusselt number for thermal entry region formula is defined as a measure of the ratio between heat transfer by convection (α) and heat transfer by conduction alone and is represented as Nu = 3.0*Re_D^0.0833 or Nusselt Number = 3.0*Reynolds Number Dia^0.0833. The Reynolds Number Dia is a dimensionless quantity used to predict flow patterns in fluid mechanics, specifically for turbulent flow in pipes based on diameter.

How to calculate Nusselt number for thermal entry region?

The Nusselt number for thermal entry region formula is defined as a measure of the ratio between heat transfer by convection (α) and heat transfer by conduction alone is calculated using Nusselt Number = 3.0*Reynolds Number Dia^0.0833. To calculate Nusselt number for thermal entry region, you need Reynolds Number Dia (Re_D). With our tool, you need to enter the respective value for Reynolds Number Dia and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Nusselt Number?

In this formula, Nusselt Number uses Reynolds Number Dia. We can use 3 other way(s) to calculate the same, which is/are as follows -

Nusselt Number = 0.036*(Reynolds Number Dia^0.8)*(Prandtl Number^0.33)*(Diameter/Length)^0.055
Nusselt Number = 0.027*Reynolds Number Dia^0.8*Prandtl Number^0.333*(Dynamic Viscosity at Mean Temperature/Dynamic Viscosity at Wall Temperature)^0.14
Nusselt Number = 5+0.025*(Reynolds Number Dia*Prandtl Number)^0.8

Home

FREE PDFs

🔍 Search