In the field of heat transfer, intensity of radiation is a measure of the distribution of radiant heat flux per unit area and solid angle, in a particular direction, defined according to where
* is the infinitesimal source area
* is the outgoing heat transfer from the area
* is the solid angle subtended by the infinitesimal 'target' (or 'aperture') area
* is the angle between the source area normal vector and the line-of-sight between the source and the target areas. Typical units of intensity are W·m−2·sr−1.
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| - شدة انتقال الحرارة (ar)
- Intensity (heat transfer) (en)
- Intensidade (transferência de calor) (pt)
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| - شدة انتقال الحرارة( بالإنجليزي: Intensity heat transfer)في الفيزياء الحرارية شدة الإشعاع I هو قياس تدفق حراري بالإشعاع بالنسبة لوحدة المساحة مضروبا في الزاويةمجسمة في اتجاه معين وحدتها W•m−2•sr−1, يمكن حسابها من العلاقة التالية : حيث أن :
* مساحة المصدر – متناهية في الصغر-
* معدل انتقال الحرارة
* زاوية مجسمة متناهية في الصغر
* الزاوية بين مصدر المجال المتجه وخط المشاهدة بين المصدر والهدف. ويمكن حساب الطاقة الصادرة من مصدر ما (ar)
- In the field of heat transfer, intensity of radiation is a measure of the distribution of radiant heat flux per unit area and solid angle, in a particular direction, defined according to where
* is the infinitesimal source area
* is the outgoing heat transfer from the area
* is the solid angle subtended by the infinitesimal 'target' (or 'aperture') area
* is the angle between the source area normal vector and the line-of-sight between the source and the target areas. Typical units of intensity are W·m−2·sr−1. (en)
- No campo da transferência de calor, intensidade de radiação é a medida da distribuição de fluxo de calor radiante por unidade de área e ângulo sólido, em uma direção em particular, definida de acordo a onde
* é a área da fonte infinitesimal
* é a transferência de calor saindo da área
* é o ângulo sólido subentendido pela área de 'alvo' (ou 'abertura') infinitesimal
* é o ângulo entre o vetor normal da área da fonte e a linha de vista entre as áreas fonte e alvo. Unidades típicas da intensidade são W·m-2·sr-1. (pt)
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| - شدة انتقال الحرارة( بالإنجليزي: Intensity heat transfer)في الفيزياء الحرارية شدة الإشعاع I هو قياس تدفق حراري بالإشعاع بالنسبة لوحدة المساحة مضروبا في الزاويةمجسمة في اتجاه معين وحدتها W•m−2•sr−1, يمكن حسابها من العلاقة التالية : حيث أن :
* مساحة المصدر – متناهية في الصغر-
* معدل انتقال الحرارة
* زاوية مجسمة متناهية في الصغر
* الزاوية بين مصدر المجال المتجه وخط المشاهدة بين المصدر والهدف. ويمكن حساب الطاقة الصادرة من مصدر ما (ar)
- In the field of heat transfer, intensity of radiation is a measure of the distribution of radiant heat flux per unit area and solid angle, in a particular direction, defined according to where
* is the infinitesimal source area
* is the outgoing heat transfer from the area
* is the solid angle subtended by the infinitesimal 'target' (or 'aperture') area
* is the angle between the source area normal vector and the line-of-sight between the source and the target areas. Typical units of intensity are W·m−2·sr−1. Intensity can sometimes be called radiance, especially in other fields of study. The emissive power of a surface can be determined by integrating the intensity of emitted radiation over a hemisphere surrounding the surface: For diffuse emitters, the emitted radiation intensity is the same in all directions, with the result that The factor (which really should have the units of steradians) is a result of the fact that intensity is defined to exclude the effect of reduced view factor at large values ; note that the solid angle corresponding to a hemisphere is equal to steradians. Spectral intensity is the corresponding spectral measurement of intensity; in other words, the intensity as a function of wavelength. (en)
- No campo da transferência de calor, intensidade de radiação é a medida da distribuição de fluxo de calor radiante por unidade de área e ângulo sólido, em uma direção em particular, definida de acordo a onde
* é a área da fonte infinitesimal
* é a transferência de calor saindo da área
* é o ângulo sólido subentendido pela área de 'alvo' (ou 'abertura') infinitesimal
* é o ângulo entre o vetor normal da área da fonte e a linha de vista entre as áreas fonte e alvo. Unidades típicas da intensidade são W·m-2·sr-1. Intensidade pode algumas vezes ser chamada radiança, especialmente em outros campos de estudo. O poder emissivo de uma superfície pode ser determinado por integração da intensidade da radiação emitida ao longo de um hemisfério em torno da superfície: Para emissores difusos, a intensidade da radiação emitida é a mesma em todas as direções, com o resultado que O fator (que realmente deve ter as unidades de esferorradianos) é resultado do fato de que a intensidade é definida para excluir o efeito do fator de vista reduzido em grandes valores ; note-se que o ângulo sólido que corresponde a um hemisfério é igual a esferorradianos. Intensidade espectral é a medição da intensidade espectral correspondente; em outras palavras, a intensidade como uma função do comprimento de onda. (pt)
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