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Diffuse Radiation Exchange from Surface 2 to Surface 1 Formula

GoDirect Diffuse Radiation from Surface 2 to Surface 1 Formula

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Heat Transfer from Surface 2 to 1 is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second). Check FAQs

q 2->1 = J 2D \cdot A 2 \cdot F 21 \cdot (1 - ρ 1s)

q_2->1 - Heat Transfer from Surface 2 to 1?J_2D - Diffuse Radiosity for Surface 2?A₂ - Surface Area of Body 2?F₂₁ - Radiation Shape Factor 21?ρ_1s - Specular Component of Reflectivity of Surface 1?

Diffuse Radiation Exchange from Surface 2 to Surface 1 Example

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Here is how the Diffuse Radiation Exchange from Surface 2 to Surface 1 equation looks like with Values.

Here is how the Diffuse Radiation Exchange from Surface 2 to Surface 1 equation looks like with Units.

Here is how the Diffuse Radiation Exchange from Surface 2 to Surface 1 equation looks like.

423.94 = 44 \cdot 50 \cdot 0.41 \cdot (1 - 0.53)

423.94W = 44W/m² \cdot 50m² \cdot 0.41 \cdot (1 - 0.53)

423.94 = 44 \cdot 50 \cdot 0.41 \cdot (1 - 0.53)

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Diffuse Radiation Exchange from Surface 2 to Surface 1 Solution

Follow our step by step solution on how to calculate Diffuse Radiation Exchange from Surface 2 to Surface 1?

FIRST Step Consider the formula

q 2->1 = J 2D \cdot A 2 \cdot F 21 \cdot (1 - ρ 1s)

Next Step Substitute values of Variables

∴

q 2->1 = 44W/m² \cdot 50m² \cdot 0.41 \cdot (1 - 0.53)

Next Step Prepare to Evaluate

∴

q 2->1 = 44 \cdot 50 \cdot 0.41 \cdot (1 - 0.53)

LAST Step Evaluate

∴

q 2->1 = 423.94W

Diffuse Radiation Exchange from Surface 2 to Surface 1 Formula Elements

Variables

Heat Transfer from Surface 2 to 1

Heat Transfer from Surface 2 to 1 is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).

Symbol: q_2->1

Measurement: PowerUnit: W

Note: Value should be greater than 0.

Formulas to find Heat Transfer from Surface 2 to 1

Diffuse Radiosity for Surface 2

Diffuse Radiosity for Surface 2 represents the rate at which radiation energy leaves a unit area of a surface in all directions.

Symbol: J_2D

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Diffuse Radiosity for Surface 2

Surface Area of Body 2

The Surface Area of Body 2 is the area of body 2 upon which the radiation takes place.

Symbol: A₂

Measurement: AreaUnit: m²

Note: Value can be positive or negative.

Formulas to find Surface Area of Body 2

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.

Symbol: F₂₁

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Radiation Shape Factor 21

Specular Component of Reflectivity of Surface 1

Specular Component of Reflectivity of Surface 1 is a type of surface reflectance often described as a mirror-like reflection of light from the surface.

Symbol: ρ_1s

Measurement: NAUnit: Unitless

Note: Value should be less than 1.

Formulas to find Specular Component of Reflectivity of Surface 1

Other Formulas to find Heat Transfer from Surface 2 to 1

Go Direct Diffuse Radiation from Surface 2 to Surface 1

q 2->1 = A 2 \cdot F 21 \cdot J 2

Other formulas in Radiation Exchange with Specular Surfaces category

Go Initial Radiation Intensity

I λo = \frac{I λx}{\exp (- (α λ \cdot x))}

Go Monochromatic Absorption Coefficient if Gas is Non-Reflecting

α λ = 1 - 𝜏 λ

Go Monochromatic Transmissivity

𝜏 λ = \exp (- (α λ \cdot x))

Go Monochromatic Transmissivity if Gas is Non Reflecting

𝜏 λ = 1 - α λ

How to Evaluate Diffuse Radiation Exchange from Surface 2 to Surface 1?

Diffuse Radiation Exchange from Surface 2 to Surface 1 evaluator uses Heat Transfer from Surface 2 to 1 = Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1) to evaluate the Heat Transfer from Surface 2 to 1, The Diffuse Radiation Exchange from Surface 2 to Surface 1 formula is defined as the function of Diffuse radiosity, surface area, shape factor specular component of reflectivity. In this arrangement any diffuse radiation leaving surface 1 that is specularly reflected by 2 will not be reflected directly back to 1. This is an important point, for in eliminating such reflections we are considering only the direct diffuse exchange between the two surfaces. Heat Transfer from Surface 2 to 1 is denoted by q_2->1 symbol.

How to evaluate Diffuse Radiation Exchange from Surface 2 to Surface 1 using this online evaluator? To use this online evaluator for Diffuse Radiation Exchange from Surface 2 to Surface 1, enter Diffuse Radiosity for Surface 2 (J_2D), Surface Area of Body 2 (A₂), Radiation Shape Factor 21 (F₂₁) & Specular Component of Reflectivity of Surface 1 (ρ_1s) and hit the calculate button.

FAQs on Diffuse Radiation Exchange from Surface 2 to Surface 1

What is the formula to find Diffuse Radiation Exchange from Surface 2 to Surface 1?

The formula of Diffuse Radiation Exchange from Surface 2 to Surface 1 is expressed as Heat Transfer from Surface 2 to 1 = Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1). Here is an example- 423.94 = 44*50*0.41*(1-0.53).

How to calculate Diffuse Radiation Exchange from Surface 2 to Surface 1?

With Diffuse Radiosity for Surface 2 (J_2D), Surface Area of Body 2 (A₂), Radiation Shape Factor 21 (F₂₁) & Specular Component of Reflectivity of Surface 1 (ρ_1s) we can find Diffuse Radiation Exchange from Surface 2 to Surface 1 using the formula - Heat Transfer from Surface 2 to 1 = Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1).

What are the other ways to Calculate Heat Transfer from Surface 2 to 1?

Here are the different ways to Calculate Heat Transfer from Surface 2 to 1-

Heat Transfer from Surface 2 to 1=Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body

Can the Diffuse Radiation Exchange from Surface 2 to Surface 1 be negative?

No, the Diffuse Radiation Exchange from Surface 2 to Surface 1, measured in Power cannot be negative.

Which unit is used to measure Diffuse Radiation Exchange from Surface 2 to Surface 1?

Diffuse Radiation Exchange from Surface 2 to Surface 1 is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Diffuse Radiation Exchange from Surface 2 to Surface 1 can be measured.

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Diffuse Radiation Exchange from Surface 2 to Surface 1 Formula

​GoDirect Diffuse Radiation from Surface 2 to Surface 1 Formula

Diffuse Radiation Exchange from Surface 2 to Surface 1 Example

Diffuse Radiation Exchange from Surface 2 to Surface 1 Solution

Diffuse Radiation Exchange from Surface 2 to Surface 1 Formula Elements

Other Formulas to find Heat Transfer from Surface 2 to 1

Other formulas in Radiation Exchange with Specular Surfaces category

How to Evaluate Diffuse Radiation Exchange from Surface 2 to Surface 1?

FAQs on Diffuse Radiation Exchange from Surface 2 to Surface 1

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GoDirect Diffuse Radiation from Surface 2 to Surface 1 Formula