简单稀流体中存在引力场时的热通量：基于广义相对论动力学理论的一阶梯度方法
Heat flux in the presence of a gravitational field in a simple dilute fluid: an approach based in general relativistic kinetic theory to first order in the gradients
摘要：
Richard C.托尔曼分析了温度梯度与平衡状态下的引力场之间的关系。在2012年，托尔曼\textquoteright定律被推广到一个简单的稀释相对论性流体的非平衡情况。在这种情况下的结果，通过引入引力通过分子加速度，耦合的度量系数和状态变量的梯度的热通量。本文通过对玻尔兹曼方程中的分子加速度\textquoteright进行\textquotedblright{}抑制，证明了引力场驱动热流。这个过程对应于通过测地线的粒子运动的描述，其中假设史瓦西度规的牛顿极限。这种效应在非相对论区域消失，这可以通过直接计算相应的极限得到证明。
英文摘要：
Richard C. Tolman analyzed the relation between a temperature gradient and a gravitational field in an equilibrium situation. In 2012, Tolman\textquoteright s law was generalized to a non-equilibrium situation for a simple dilute relativistic fluid. The result in that scenario, obtained by introducing the gravitational force through the molecular acceleration, couples the heat flux with the metric coefficients and the gradients of the state variables. In the present paper it is shown, by \textquotedblleft suppressing\textquotedblright{} the molecular acceleration in Boltzmann\textquoteright s equation, that a gravitational field drives a heat flux. This procedure corresponds to the description of particle motion through geodesics, in which a Newtonian limit to the Schwarzschild metric is assumed. The effect vanishes in the non-relativistic regime, as evidenced by the direct evaluation of the corresponding limit.
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