论文标题
血浆鞘的BOHM标准远离渐近极限
Bohm criterion of plasma sheaths away from asymptotic limit
论文作者
论文摘要
鞘入口处的血浆出口流速受到BOHM标准的约束。所谓的BOHM速度调节血浆颗粒和动力排气通量到墙壁，通常将其作为边界条件部署，以排除准中性等离子体模型中的鞘区域。这里，使用各向异性等离子体的传输方程，在中间等离子体方向上进行了BOHM标准分析，从以前已知的绝热定律的限制案例和无限debye长度的渐近限制中进行。所得的BOHM速度明确依赖于局部血浆热通量，温度以及热力。与动力学模拟的比较证明了其在等离子鞘过渡区域的准确性，在该区域中，甲酸性较弱的扰动并应用了BOHM标准。
The plasma exit flow speed at the sheath entrance is constrained by the Bohm criterion. The so-called Bohm speed regulates the plasma particle and power exhaust fluxes to the wall, and it is commonly deployed as a boundary condition to exclude the sheath region in quasi-neutral plasma modeling. Here the Bohm criterion analysis is performed in the intermediate plasma regime away from the previously known limiting cases of adiabatic laws and the asymptotic limit of infinitesimal Debye length in a finite-size system, using the transport equations of an anisotropic plasma. The resulting Bohm speed has explicit dependence on local plasma heat flux, temperature isotropization, and thermal force. Comparison with kinetic simulations demonstrates its accuracy over the plasma-sheath transition region in which quasineutrality is weakly perturbed and Bohm criterion applies.
