## Thermal conductivity |

the

**thermal conductivity**of a material is a measure of its ability to . it is commonly denoted by , , or .conduct heat heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal conductivity. for instance, metals typically have high thermal conductivity and are very efficient at conducting heat, while the opposite is true for insulating materials like

. correspondingly, materials of high thermal conductivity are widely used instyrofoam applications, and materials of low thermal conductivity are used asheat sink . the reciprocal of thermal conductivity is calledthermal insulation .thermal resistivity the defining equation for thermal conductivity is , where is the

, is the thermal conductivity, and is theheat flux temperature . this is known asgradient for heat conduction. although commonly expressed as afourier's law , the most general form of thermal conductivity is a second-rankscalar . however, the tensorial description only becomes necessary in materials which aretensor .anisotropic - definition
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The **thermal conductivity** of a material is a measure of its ability to

Heat transfer occurs at a lower rate in materials of low thermal conductivity than in materials of high thermal conductivity. For instance, metals typically have high thermal conductivity and are very efficient at conducting heat, while the opposite is true for insulating materials like

The defining equation for thermal conductivity is , where is the