Where did the last name Lytle come from? Where did the last name Kerr come from?  English and Scottish: topographic name for someone who lived by  a patch of wet ground overgrown with brushwood, northern Middle  English kerr (Old Norse kjarr). A legendâ¦ grew up that  the Kerrs were left-handed, on theory that the name is derived from  Gaelic cearr 'wrong-handed', 'left-handed'.
Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface. In electronics, the term applies to any electrostatic field and any magnetic field.
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 [W/m2].