## Equivalent Diameter when Flow in Rectangular Duct Solution

STEP 0: Pre-Calculation Summary
Formula Used
Equivalent Diameter = (4*Length of Rectangular Section*Breadth of Rectangle)/(2*(Length of Rectangular Section+Breadth of Rectangle))
De = (4*L*B)/(2*(L+B))
This formula uses 3 Variables
Variables Used
Equivalent Diameter - (Measured in Meter) - Equivalent Diameter of an irregularly shaped object is the diameter of a sphere of equivalent volume.
Length of Rectangular Section - (Measured in Meter) - Length of Rectangular Section is the total distance from one end to other end, length is the longest side of rectangle.
Breadth of Rectangle - (Measured in Meter) - Breadth of Rectangle is the distance from one end to the other which is perpendicular to the length.
STEP 1: Convert Input(s) to Base Unit
Length of Rectangular Section: 750 Meter --> 750 Meter No Conversion Required
Breadth of Rectangle: 4 Meter --> 4 Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
De = (4*L*B)/(2*(L+B)) --> (4*750*4)/(2*(750+4))
Evaluating ... ...
De = 7.95755968169761
STEP 3: Convert Result to Output's Unit
7.95755968169761 Meter --> No Conversion Required
7.95755968169761 Meter <-- Equivalent Diameter
(Calculation completed in 00.016 seconds)
You are here -
Home »

## Credits

Created by Ayush gupta
University School of Chemical Technology-USCT (GGSIPU), New Delhi
Ayush gupta has created this Calculator and 200+ more calculators!
Verified by Soupayan banerjee
National University of Judicial Science (NUJS), Kolkata
Soupayan banerjee has verified this Calculator and 300+ more calculators!

## < 10+ Basics of Heat Transfer Calculators

Log Mean Temperature Difference for Counter Current Flow

## Log Mean Temperature Difference for Counter Current Flow

Formula
"LMTD" = (("T"_{"ho"}-"T"_{"ci"})-("T"_{"hi"}-"T"_{"co"}))/ln(("T"_{"ho"}-"T"_{"ci"})/("T"_{"hi"}-"T"_{"co"}))

Example
"19.57615K"=(("20K"-"5K")-("35K"-"10K"))/ln(("20K"-"5K")/("35K"-"10K"))

Calculator
LaTeX
Log Mean Temperature Difference = ((Outlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)-(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid))/ln((Outlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid))
Log Mean Temperature Difference for CoCurrent Flow

## Log Mean Temperature Difference for CoCurrent Flow

Formula
"LMTD" = (("T"_{"ho"}-"T"_{"co"})-("T"_{"hi"}-"T"_{"ci"}))/ln(("T"_{"ho"}-"T"_{"co"})/("T"_{"hi"}-"T"_{"ci"}))

Example
"18.20478K"=(("20K"-"10K")-("35K"-"5K"))/ln(("20K"-"10K")/("35K"-"5K"))

Calculator
LaTeX
Log Mean Temperature Difference = ((Outlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)-(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid))/ln((Outlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid))
Logarithmic Mean Area of Cylinder

## Logarithmic Mean Area of Cylinder

Formula
"A"_{""mean""} = ("A"_{"o"}-"A"_{"i"})/ln("A"_{"o"}/"A"_{"i"})

Example
"9.865214m²"=("12m²"-"8m²")/ln("12m²"/"8m²")

Calculator
LaTeX
Logarithmic Mean Area = (Outer Area of the Cylinder-Inner Area of the Cylinder)/ln(Outer Area of the Cylinder/Inner Area of the Cylinder)
Equivalent Diameter when Flow in Rectangular Duct

## Equivalent Diameter when Flow in Rectangular Duct

Formula
"D"_{"e"} = (4*"L"*"B")/(2*("L"+"B"))

Example
"7.95756m"=(4*"750m"*"4m")/(2*("750m"+"4m"))

Calculator
LaTeX
Equivalent Diameter = (4*Length of Rectangular Section*Breadth of Rectangle)/(2*(Length of Rectangular Section+Breadth of Rectangle))
Heat Transfer from Stream of Gas flowing in Turbulent Motion

## Heat Transfer from Stream of Gas flowing in Turbulent Motion

Formula
"h"_{"transfer"} = (16.6*"c"_{"p"}*("G")^0.8)/("D"^0.2)

Example
"86.84618W/m²*K"=(16.6*"0.0002kcal(IT)/kg*°C"*("13kg/s/m²")^0.8)/("3m"^0.2)

Calculator
LaTeX
Heat Transfer Coefficient = (16.6*Specific Heat Capacity*(Mass Velocity)^0.8)/(Internal Diameter of Pipe^0.2)
Colburn Factor using Chilton Colburn Analogy

## Colburn Factor using Chilton Colburn Analogy

Formula
"j"_{"H"} = "Nu"/("Re")*("Pr")^(1/3)

Example
"0.001243"="7"/("5000")*("0.7")^(1/3)

Calculator
LaTeX
Colburn's j-factor = Nusselt Number/(Reynolds Number)*(Prandtl Number)^(1/3)
Heat Transfer Coefficient based on Temperature Difference

## Heat Transfer Coefficient based on Temperature Difference

Formula
"h"_{"transfer"} = "q"/"ΔT"_{"Overall"}

Example
"0.312727W/m²*K"="17.2W"/"55K"

Calculator
LaTeX
Heat Transfer Coefficient = Heat Transfer/Overall Temperature Difference
Equivalent Diameter of Non-Circular Duct

## Equivalent Diameter of Non-Circular Duct

Formula
"D"_{"e"} = (4*"A"_{"cs"})/"P"

Example
"1.25m"=(4*"25m²")/"80m"

Calculator
LaTeX
Equivalent Diameter = (4*Cross Sectional Area of Flow)/Wetted Perimeter

Formula
"r"_{"H"} = "A"_{"cs"}/"P"

Example
"0.3125m"="25m²"/"80m"

Calculator
LaTeX
Hydraulic Radius = Cross Sectional Area of Flow/Wetted Perimeter
Colburn J-Factor given Fanning Friction Factor

## Colburn J-Factor given Fanning Friction Factor

Formula
"j"_{"H"} = "f"/2

Example
"0.245"="0.49"/2

Calculator
LaTeX
Colburn's j-factor = Fanning Friction Factor/2

## Equivalent Diameter when Flow in Rectangular Duct Formula

Equivalent Diameter = (4*Length of Rectangular Section*Breadth of Rectangle)/(2*(Length of Rectangular Section+Breadth of Rectangle))
De = (4*L*B)/(2*(L+B))

## What is Heat Transfer?

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes.

## Define Thermal Conductivity & Factors affecting it?

Thermal conductivity is defined as the ability of a substance to conduct heat. Factors Affecting The Thermal Conductivity are: Moisture, Density of material, Pressure, Temperature & Structure of material.

## How to Calculate Equivalent Diameter when Flow in Rectangular Duct?

Equivalent Diameter when Flow in Rectangular Duct calculator uses Equivalent Diameter = (4*Length of Rectangular Section*Breadth of Rectangle)/(2*(Length of Rectangular Section+Breadth of Rectangle)) to calculate the Equivalent Diameter, The Equivalent Diameter when Flow in Rectangular Duct formula is defined as the ratio of 4 multiply by length and breadth of rectangle to the 2 multiply by summation of length and breadth of rectangle. Equivalent Diameter is denoted by De symbol.

How to calculate Equivalent Diameter when Flow in Rectangular Duct using this online calculator? To use this online calculator for Equivalent Diameter when Flow in Rectangular Duct, enter Length of Rectangular Section (L) & Breadth of Rectangle (B) and hit the calculate button. Here is how the Equivalent Diameter when Flow in Rectangular Duct calculation can be explained with given input values -> 7.95756 = (4*750*4)/(2*(750+4)).

### FAQ

What is Equivalent Diameter when Flow in Rectangular Duct?
The Equivalent Diameter when Flow in Rectangular Duct formula is defined as the ratio of 4 multiply by length and breadth of rectangle to the 2 multiply by summation of length and breadth of rectangle and is represented as De = (4*L*B)/(2*(L+B)) or Equivalent Diameter = (4*Length of Rectangular Section*Breadth of Rectangle)/(2*(Length of Rectangular Section+Breadth of Rectangle)). Length of Rectangular Section is the total distance from one end to other end, length is the longest side of rectangle & Breadth of Rectangle is the distance from one end to the other which is perpendicular to the length.
How to calculate Equivalent Diameter when Flow in Rectangular Duct?
The Equivalent Diameter when Flow in Rectangular Duct formula is defined as the ratio of 4 multiply by length and breadth of rectangle to the 2 multiply by summation of length and breadth of rectangle is calculated using Equivalent Diameter = (4*Length of Rectangular Section*Breadth of Rectangle)/(2*(Length of Rectangular Section+Breadth of Rectangle)). To calculate Equivalent Diameter when Flow in Rectangular Duct, you need Length of Rectangular Section (L) & Breadth of Rectangle (B). With our tool, you need to enter the respective value for Length of Rectangular Section & Breadth of Rectangle 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 Equivalent Diameter?
In this formula, Equivalent Diameter uses Length of Rectangular Section & Breadth of Rectangle. We can use 1 other way(s) to calculate the same, which is/are as follows -
• Equivalent Diameter = (4*Cross Sectional Area of Flow)/Wetted Perimeter Let Others Know