Аннотация:The paper is devoted to the further development and systematic performance evaluationof a recent deterministic framework Nesvetay-3D for modelling three-dimensional rarefiedgas flows. Firstly, a review of the existing discretization and parallelization strategies forsolving numerically the Boltzmann kinetic equation with various model collision integralsis carried out. Secondly, a new parallelization strategy for the implicit time evolutionmethod is implemented which improves scaling on large CPU clusters. Accuracy andscalability of the methods are demonstrated on a pressure-driven rarefied gas flow througha finite-length circular pipe as well as an external supersonic flow over a three-dimensionalre-entry geometry of complicated aerodynamic shape