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Area Physics for electrotechnology / Thermodynamics

IEV ref113-04-37

Symbol
φ
q

en
density of heat flow rate
areic heat flow rate
vector quantity with magnitude equal to the heat flow rate dΦ through a surface element divided by the area dA of the element, and direction eφ in the direction of propagation of heat, thus φ= dΦ dA e φ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqk0di9Wr=fpeei0di9v8qiW7rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaGWadiab=v9aMjabg2 da9maalaaabaqcLbuacaGGKbGaeuOPdyeakeaajugqbiaacsgacaWG bbaaaOGaaCyzamaaBaaaleaacqaHvpGzaeqaaaaa@4418@

NOTE 1 At a fixed point in a medium, the direction of propagation of heat is opposite to the temperature gradient. At a point on the surface separating two media with different temperatures, the direction of propagation of heat is normal to the surface, from higher to lower temperatures.

NOTE 2 The coherent SI unit of density of heat flux rate is watt per square metre, W/m2.


fr
flux thermique surfacique, m
densité de flux thermique, f
grandeur vectorielle dont la norme est le quotient du flux thermique dΦ traversant un élément de surface par l'aire dA de cet élément et dont la direction eφ est celle de la propagation de la chaleur, soit φ= dΦ dA e φ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqk0di9Wr=fpeei0di9v8qiW7rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaGWadiab=v9aMjabg2 da9maalaaabaqcLbuacaGGKbGaeuOPdyeakeaajugqbiaacsgacaWG bbaaaOGaaCyzamaaBaaaleaacqaHvpGzaeqaaaaa@4418@

NOTE 1 En un point fixe d'un milieu, la direction de propagation de la chaleur est opposée au gradient de température. En un point d'une surface séparant deux milieux de températures différentes, la direction de propagation de la chaleur est normale à la surface, orientée vers les plus basses températures.

NOTE 2 L'unité SI cohérente de flux thermique surfacique est le watt par mètre carré, W/m2.


ar
كثافة معدل التدفق الحرارى
معدل تدفق الحرارة السطحية

de
Wärmestromdichte, f

es
flujo térmico superficial
densidad de flujo térmico

fi
lämpövirran tiheys

it
densità di tasso di flusso di calore
tasso di flusso di calore areico

ja
熱流質密度

pl
gęstość strumienia cieplnego

pt
fluxo térmico superficial

sv
värmeflöde per area
areart värmeflöde

zh
热流率密度

Publication date: 2011-04
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