Equivalent Diameter when Flow in Rectangular Duct Calculator

✖Length of Rectangular Section is the total distance from one end to other end, length is the longest side of rectangle.ⓘ Length of Rectangular Section [L]			+10% -10%
✖Breadth of Rectangle is the distance from one end to the other which is perpendicular to the length.ⓘ Breadth of Rectangle [B]			+10% -10%

✖Equivalent Diameter of an irregularly shaped object is the diameter of a sphere of equivalent volume.ⓘ Equivalent Diameter when Flow in Rectangular Duct [D_e]

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Formula

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Equivalent Diameter when Flow in Rectangular Duct

Formula

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

Example

`"1.221429m"=(4*"1.9m"*"0.9m")/(2*("1.9m"+"0.9m"))`

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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))
D_e = (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: 1.9 Meter --> 1.9 Meter No Conversion Required
Breadth of Rectangle: 0.9 Meter --> 0.9 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

D_e = (4*L*B)/(2*(L+B)) --> (4*1.9*0.9)/(2*(1.9+0.9))

Evaluating ... ...

D_e = 1.22142857142857

STEP 3: Convert Result to Output's Unit

1.22142857142857 Meter --> No Conversion Required

FINAL ANSWER

1.22142857142857 ≈ 1.221429 Meter <-- Equivalent Diameter

(Calculation completed in 00.004 seconds)

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< 17 Basics of Heat Transfer Calculators

Log Mean Temperature Difference for Counter Current Flow

Go 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

Go 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

Go Logarithmic Mean Area = (Outer Area of Cylinder-Inner Area of Cylinder)/ln(Outer Area of Cylinder/Inner Area of Cylinder)

Equivalent Diameter when Flow in Rectangular Duct

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

Internal Diameter of Pipe given Heat Transfer Coefficient for Gas in Turbulent Motion

Go Internal Diameter of Pipe = ((16.6*Specific Heat Capacity*(Mass Velocity)^0.8)/(Heat Transfer Coefficient for Gas))^(1/0.2)

Heat Transfer from Stream of Gas flowing in Turbulent Motion

Go Heat Transfer Coefficient = (16.6*Specific Heat Capacity*(Mass Velocity)^0.8)/(Internal Diameter of Pipe^0.2)

Colburn Factor using Chilton Colburn Analogy

Go Colburn's j-factor = Nusselt Number/((Reynolds Number)*(Prandtl Number)^(1/3))

Heat Transfer Coefficient based on Temperature Difference

Go Heat Transfer Coefficient = Heat Transfer/Overall Temperature Difference

Equivalent Diameter of Non-Circular Duct

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

Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film

Go Heat Transfer Coefficient = 1/((Area)*Local Heat Transfer Resistance)

Local Heat Transfer Resistance of Air-Film

Go Local Heat Transfer Resistance = 1/(Heat Transfer Coefficient*Area)

Wetted Perimeter given Hydraulic Radius

Go Wetted Perimeter = Cross Sectional Area of Flow/Hydraulic Radius

Hydraulic Radius

Go Hydraulic Radius = Cross Sectional Area of Flow/Wetted Perimeter

Reynolds Number given Colburn Factor

Go Reynolds Number = (Colburn's j-factor/0.023)^((-1)/0.2)

J-Factor for Pipe Flow

Go Colburn's j-factor = 0.023*(Reynolds Number)^(-0.2)

Colburn J-Factor given Fanning Friction Factor

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

Fanning Friction Factor given Colburn J-Factor

Go Fanning Friction Factor = 2*Colburn's j-factor

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))
D_e = (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 D_e 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 -> 1.221429 = (4*1.9*0.9)/(2*(1.9+0.9)).

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 D_e = (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

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