IEVref: 113-04-37 ID: Language: en Status: Standard Term: density of heat flow rate Synonym1: areic heat flow rate [Preferred] Synonym2: Synonym3: Symbol: φq Definition: 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 $\phi =\frac{d\Phi }{dA}{e}_{\phi }$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. Publication date: 2011-04 Source: Replaces: Internal notes: 2014-07-10: Symbol φ, q corrected to φ
q. JGO 2017-06-02: Cleanup - Remove Attached Image 113-04-37en.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: