Shape Factor 12 given Area of Both Surface and Shape Factor 21 Calculator

✖The Surface Area of Body 2 is the area of body 2 upon which the radiation takes place.ⓘ Surface Area of Body 2 [A₂]			+10% -10%
✖The Surface Area of Body 1 is the area of body 1 through which the radiation takes place.ⓘ Surface Area of Body 1 [A₁]			+10% -10%
✖Radiation Shape Factor 21 is the fraction of radiation energy radiated by one surface which is incident on another surface when both surfaces are placed in a non-absorbing medium.ⓘ Radiation Shape Factor 21 [F₂₁]			+10% -10%

✖Radiation Shape Factor 12 is the fraction of radiation energy radiated by one surface which is incident on another surface when both surfaces are placed in a non-absorbing medium.ⓘ Shape Factor 12 given Area of Both Surface and Shape Factor 21 [F₁₂]

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Formula

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Shape Factor 12 given Area of Both Surface and Shape Factor 21

Formula

`"F"_{"12"} = ("A"_{"2"}/"A"_{"1"})*"F"_{"21"}`

Example

`"0.590098"=("50m²"/"34.74m²")*"0.41"`

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Shape Factor 12 given Area of Both Surface and Shape Factor 21 Solution

STEP 0: Pre-Calculation Summary

Formula Used

Radiation Shape Factor 12 = (Surface Area of Body 2/Surface Area of Body 1)*Radiation Shape Factor 21
F₁₂ = (A₂/A₁)*F₂₁
This formula uses 4 Variables

Variables Used

Radiation Shape Factor 12 - Radiation Shape Factor 12 is the fraction of radiation energy radiated by one surface which is incident on another surface when both surfaces are placed in a non-absorbing medium.
Surface Area of Body 2 - (Measured in Square Meter) - The Surface Area of Body 2 is the area of body 2 upon which the radiation takes place.
Surface Area of Body 1 - (Measured in Square Meter) - The Surface Area of Body 1 is the area of body 1 through which the radiation takes place.
Radiation Shape Factor 21 - Radiation Shape Factor 21 is the fraction of radiation energy radiated by one surface which is incident on another surface when both surfaces are placed in a non-absorbing medium.

STEP 1: Convert Input(s) to Base Unit

Surface Area of Body 2: 50 Square Meter --> 50 Square Meter No Conversion Required
Surface Area of Body 1: 34.74 Square Meter --> 34.74 Square Meter No Conversion Required
Radiation Shape Factor 21: 0.41 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

F₁₂ = (A₂/A₁)*F₂₁ --> (50/34.74)*0.41

Evaluating ... ...

F₁₂ = 0.590097869890616

STEP 3: Convert Result to Output's Unit

0.590097869890616 --> No Conversion Required

FINAL ANSWER

0.590097869890616 ≈ 0.590098 <-- Radiation Shape Factor 12

(Calculation completed in 00.004 seconds)

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< 23 Radiation Formulas Calculators

Radiosity given Emissive Power and Irradiation

Go Radiosity = (Emissivity*Emissive Power of Blackbody)+(Reflectivity*Irradiation)

Area of Surface 1 given Area 2 and Radiation Shape Factor for Both Surfaces

Go Surface Area of Body 1 = Surface Area of Body 2*(Radiation Shape Factor 21/Radiation Shape Factor 12)

Area of Surface 2 given Area 1 and Radiation Shape Factor for Both Surfaces

Go Surface Area of Body 2 = Surface Area of Body 1*(Radiation Shape Factor 12/Radiation Shape Factor 21)

Shape Factor 12 given Area of Both Surface and Shape Factor 21

Go Radiation Shape Factor 12 = (Surface Area of Body 2/Surface Area of Body 1)*Radiation Shape Factor 21

Shape Factor 21 given Area of Both Surface and Shape Factor 12

Go Radiation Shape Factor 21 = Radiation Shape Factor 12*(Surface Area of Body 1/Surface Area of Body 2)

Temperature of Radiation Shield Placed between Two Parallel Infinite Planes with Equal Emissivities

Go Temperature of Radiation Shield = (0.5*((Temperature of Plane 1^4)+(Temperature of Plane 2^4)))^(1/4)

Emissive Power of Blackbody

Go Emissive Power of Blackbody = [Stefan-BoltZ]*(Temperature of Blackbody^4)

Net Energy Leaving given Radiosity and Irradiation

Go Heat Transfer = Area*(Radiosity-Irradiation)

Emissive Power of Non Blackbody given Emissivity

Go Emissive Power of Non Blackbody = Emissivity*Emissive Power of Blackbody

Emissivity of Body

Go Emissivity = Emissive Power of Non Blackbody/Emissive Power of Blackbody

Total Resistance in Radiation Heat Transfer given Emissivity and Number of Shields

Go Resistance = (Number of Shields+1)*((2/Emissivity)-1)

Reflected Radiation given Absorptivity and Transmissivity

Go Reflectivity = 1-Absorptivity-Transmissivity

Absorptivity given Reflectivity and Transmissivity

Go Absorptivity = 1-Reflectivity-Transmissivity

Transmissivity Given Reflectivity and Absorptivity

Go Transmissivity = 1-Absorptivity-Reflectivity

Mass of Particle Given Frequency and Speed of Light

Go Mass of Particle = [hP]*Frequency/([c]^2)

Energy of each Quanta

Go Energy of Each Quanta = [hP]*Frequency

Wavelength Given Speed of Light and Frequency

Go Wavelength = [c]/Frequency

Frequency given Speed of Light and Wavelength

Go Frequency = [c]/Wavelength

Radiation Temperature given Maximum Wavelength

Go Radiation Temperature = 2897.6/Maximum Wavelength

Maximum Wavelength at given Temperature

Go Maximum Wavelength = 2897.6/Radiation Temperature

Resistance in Radiation Heat Transfer when No Shield is Present and Equal Emissivities

Go Resistance = (2/Emissivity)-1

Reflectivity given Absorptivity for Blackbody

Go Reflectivity = 1-Absorptivity

Reflectivity given Emissivity for Blackbody

Go Reflectivity = 1-Emissivity

< 25 Important Formulas in Radiation Heat Transfer Calculators

Heat Transfer between Concentric Spheres

Go Heat Transfer = (Surface Area of Body 1*[Stefan-BoltZ]*((Temperature of Surface 1^4)-(Temperature of Surface 2^4)))/((1/Emissivity of Body 1)+(((1/Emissivity of Body 2)-1)*((Radius of Smaller Sphere/Radius of Larger Sphere)^2)))

Heat Transfer between Small Convex Object in Large Enclosure

Go Heat Transfer = Surface Area of Body 1*Emissivity of Body 1*[Stefan-BoltZ]*((Temperature of Surface 1^4)-(Temperature of Surface 2^4))