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Direct Diffuse Radiation from Surface 2 to Surface 1 Formula

GoDiffuse Radiation Exchange 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 = A 2 \cdot F 21 \cdot J 2

q_2->1 - Heat Transfer from Surface 2 to 1?A₂ - Surface Area of Body 2?F₂₁ - Radiation Shape Factor 21?J₂ - Radiosity of 2nd Body?

Direct Diffuse Radiation from Surface 2 to Surface 1 Example

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

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

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

1004.5 = 50 \cdot 0.41 \cdot 49

1004.5W = 50m² \cdot 0.41 \cdot 49W/m²

1004.5 = 50 \cdot 0.41 \cdot 49

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Direct Diffuse Radiation from Surface 2 to Surface 1 Solution

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

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

q 2->1 = 50m² \cdot 0.41 \cdot 49W/m²

Next Step Prepare to Evaluate

∴

q 2->1 = 50 \cdot 0.41 \cdot 49

LAST Step Evaluate

∴

q 2->1 = 1004.5W

Direct Diffuse Radiation 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

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

Radiosity of 2nd Body

Radiosity of 2nd Body represents the rate at which radiation energy leaves a unit area of a surface in all directions.

Symbol: J₂

Measurement: Heat Flux DensityUnit: W/m²

Note: Value should be greater than 0.

Formulas to find Radiosity of 2nd Body

Other Formulas to find Heat Transfer from Surface 2 to 1

Go Diffuse Radiation Exchange from Surface 2 to Surface 1

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

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 Direct Diffuse Radiation from Surface 2 to Surface 1?

Direct Diffuse Radiation from Surface 2 to Surface 1 evaluator uses Heat Transfer from Surface 2 to 1 = Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body to evaluate the Heat Transfer from Surface 2 to 1, The Direct Diffuse Radiation from Surface 2 to Surface 1 formula is defined as the function of Surface area, shape factor and radiosity. Direct radiation has a definite direction but diffuse radiation follows a much more scattered, uncertain path. Because when the radiation is direct, the rays are all travelling in the same direction, an object can block them all at once. Therefore, it can be noted that shadows are only produced when direct radiation is blocked. Heat Transfer from Surface 2 to 1 is denoted by q_2->1 symbol.

How to evaluate Direct Diffuse Radiation from Surface 2 to Surface 1 using this online evaluator? To use this online evaluator for Direct Diffuse Radiation from Surface 2 to Surface 1, enter Surface Area of Body 2 (A₂), Radiation Shape Factor 21 (F₂₁) & Radiosity of 2nd Body (J₂) and hit the calculate button.

FAQs on Direct Diffuse Radiation from Surface 2 to Surface 1

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

The formula of Direct Diffuse Radiation from Surface 2 to Surface 1 is expressed as Heat Transfer from Surface 2 to 1 = Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body. Here is an example- 1004.5 = 50*0.41*49.

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

With Surface Area of Body 2 (A₂), Radiation Shape Factor 21 (F₂₁) & Radiosity of 2nd Body (J₂) we can find Direct Diffuse Radiation from Surface 2 to Surface 1 using the formula - Heat Transfer from Surface 2 to 1 = Surface Area of Body 2*Radiation Shape Factor 21*Radiosity of 2nd Body.

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=Diffuse Radiosity for Surface 2*Surface Area of Body 2*Radiation Shape Factor 21*(1-Specular Component of Reflectivity of Surface 1)

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

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

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

Direct Diffuse Radiation 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 Direct Diffuse Radiation from Surface 2 to Surface 1 can be measured.

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Direct Diffuse Radiation from Surface 2 to Surface 1 Formula

​GoDiffuse Radiation Exchange from Surface 2 to Surface 1 Formula

Direct Diffuse Radiation from Surface 2 to Surface 1 Example

Direct Diffuse Radiation from Surface 2 to Surface 1 Solution

Direct Diffuse Radiation 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 Direct Diffuse Radiation from Surface 2 to Surface 1?

FAQs on Direct Diffuse Radiation from Surface 2 to Surface 1

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GoDiffuse Radiation Exchange from Surface 2 to Surface 1 Formula