We have developed a numerical model of the thermal force based on the Monte Carlo Binary Collision model, where a distorted Maxwellian velocity distribution is used for a background plasma. Our numerical model can be applied to transport simulation of test ions in a high-collisionality background plasma without magnetic field. In this study, by a series of systematic test simulations, we have confirmed the consistency of our numerical modeling approach with the form of the thermal force analytically derived from the distorted Maxwllian velocity distribution. The test of our model has been done with respect to its dependence on parameters such as: (1) direction of the background temperature gradient, (2) test particle mass, (3) background plasma ion species, and (4) background flow velocity.
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