Figure 1

Schematic view of a binary liquid of nonspherical molecules. The two species have equal volume but different mass and different moment of inertia.Reuse & Permissions

Figure 2

Schematic view of two-particle elastic collisions. (Left panel) Frontal impact with the second particle coming from the left ($v_2>v_1$) or from the right ($v_2<v_1$). Because of the nonuniform temperature, the velocity distribution of each particle is with respect to a particular value, $T_L<T_0<T_R$. In terms of the constant gradient $\nabla T$, the differences read $\pm b_T\nabla T$. (Right panel) Case of nonzero impact parameter $b$. The upper example illustrates an initial state with linear velocity and zero angular velocity (${\omega }_i=0$), and the lower one the opposite case with finite ${\omega }_i$ and zero $v_i$. In both cases linear momentum $\Delta p$ is transferred during the collision, according to (11). Only collisions from the left side are shown.Reuse & Permissions

Figure 3

Isotope effect on the Soret coefficient $S_T$ of benzene-cyclohexane mixtures. Black points are Debuschewitz and Köhler’s experimental data at equal mole fractions [20]. The list of isotopes corresponds to the eight data points from the left to the right. The solid line is calculated from (14) with the ratio $b_T/{\ell }_0=3.4$ and the impact parameter $b=2.5$ Å; the values of $m_i$ and $I_i$ are taken from Ref. 20. The vertical offset $S_T^0=-1.1\times {10}^{-3}$K${}^{-1}$ is indicated by the dashed line. With benzene as $a$ molecules, the first two data points correspond to $\Psi >0$, and the remaining ones to negative $\Psi$.Reuse & Permissions