The nonlinear coupled constitutive relations (NCCR) has been studied intensively under structured finite-volume framework. For further engineering applications, it is necessary to study the potential capability of NCCR with the use of unstructured mesh. In this paper, a three-dimensional NCCR solver with hybrid unstructured techniques is developed on the basis of our in-house code. An upwind flux-splitting scheme with LU-SGS implicit time-marching scheme is employed. The accuracy of the developed NCCR solver is validated by two hypersonic cases, such as high-speed flows around 2D cylinder and 3D blunted cone tip in rarefied regimes. Computations show that the solver using hybrid unstructured techniques yields comparable good results as the structured one. Moreover, they can get solutions in better agreement with the Direct Simulation Monte Carlo (DSMC) than the NS results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.