ABSTRACT
For a translucent medium that is hot and/or is subjected to external radiation, energy is transferred internally by radiation in addition to conduction and convection. The conservation of energy equation in a material expresses a local balance of energy entering and leaving the medium by all modes of energy transfer, internal energy stored, and energy generated by local sources. In a translucent material, radiative energy is deposited by absorption and is lost by emission. The net energy deposited by the radiative effects can be treated as a local energy source for convection and conduction transfer. In that sense, radiation source term enters into the conservation of energy equation in the same manner as an energy source provided by electrical dissipation or by nuclear or chemical reactions. Then the conservation of energy equation is to be solved to obtain the temperature distribution in the translucent material and to determine other heat transfer characteristics such as local heat ux proles.
