**M**ulti-species**N**onequilibrium Flow**S**imulator (**MNFS**)

This code is developed originally and independently by me with Compaq Visual Fortran during last undergraduate year in National Lab for Computational Fluid Dynamics. It is capable to simulate two dimensional multi-species rarefied flows around arbitrary shape of surface with Maxwell fully/partially diffusive reflection model or Cercignani-Lampis-Lord model of gas-surface interaction, with Knudsen number ranging from 0.001 to free molecule limit. Cartesian grid is meshed inside the code by reading .dat file that contains surface points and then divide them into triangles or quadrilaterals. Then after the flowfield is believed to be steady, local mean free path is calculated then grid is adapted by dividing the cell evenly in order to make sure the requirements that cell scale small than the 1/3 of the local mean free path. Non-equilibrium module is constituted of Larsen -Borgnakke model for T-R, T-V exchange inside. Chemistry module can be employed afterwards easily. Successful calculations, i.e., Supersonic flat plate, Couette flow, etc. are performed for validations.

Reference:

- Shaowu Pan, Zhenxun Gao, and Chunhian Lee. "Numerical investigation of rarefaction effects in the vicinity of a sharp leading edge." Proceedings of the 29th International Symposium on Rarefied Gas Dynamics. Vol. 1628. AIP Publishing, 2014.
- Ning Zhou, Yuanhao Wu, Wenbin Han, and Shaowu Pan. "An extended CFD model to predict the pumping curve in low pressure plasma etch chamber." Proceedings of the 29th International Symposium on Rarefied Gas Dynamics, vol. 1628, pp. 1378-1383. AIP Publishing, 2014.