通过定义接触面滑动屈服函数和流动势函数，得出了热接触边界的互补方程。

Through defining slide yield function and floating potential function of thermo-contact surface, the complementary equation of thermo-contact boundary was got.

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在这些条件下，粒子不是沿着料斗壁面滑动，而是沿着粒子之间的壁面滑动，这样一个内部通道就形成了。

Under these conditions, particles slide on themselves rather than the hopper walls, and an internal flow channel develops.

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如果我们这样做了，会发现两接触面间的滑动摩擦力也加倍了。

If we do so we find that sliding friction between the surfaces in also doubled.

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