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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Heat flux ： ウィキペディア英語版 Heat flux Heat flux or thermal flux is the rate of heat energy transfer through a given surface, per unit time. The SI derived unit of ''heat rate'' is joule per second, or watt. Heat flux density is the heat rate per unit area. In SI units, heat flux density is measured in (HREF="http://www.kotoba.ne.jp/word/11/Watt" TITLE="Watt">W/m2 ).〔The NIST Reference on Constants, Units, and Uncertainty http://physics.nist.gov/cuu/Units/units.html〕 Heat rate is a scalar quantity, while heat flux is a vectorial quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small. Heat flux is often denoted $\backslash overrightarrow$, the subscript ''q'' specifying ''heat'' rate, as opposed to ''mass'' or ''momentum'' rate. Fourier's law is an important application of these concepts. == Heat flux along one dimension == The heat flux along a temperature gradient in x-direction is given by : $\backslash phi\_q\; =\; k\; \backslash frac$ with the thermal conductivity $k$ and the temperature $T$. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Heat flux」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.