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مکانیک::
چگالی جریان گرمایی
can be thought of as the heat flow density from material point to material point X(jt) and the heat flow density from material point x^ to x^, respectively.
All of the heat flow density associated with each interaction assembled in an infinitedimensional array is referred to as the heat flow scalar state, -h(x, t), where t is the time.
The heat flow state associates each pair of interacting material points with a heat flow density, and enables the expressions for heat flow densities H(k)(j) and 'H(j){k) as
The heat flow scalar state, h, contains the heat flow densities associated with all the interactions.
The heat flow density, h(x, t)(x' - x), has units of heat flow rate (rate of heat energy change) per volume squared.
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