Ruofan Qiu , Yancheng You, Rongqian Chen, Chenxiang Zhu, Jianfeng Zhu

DOI Number XXX-YYY-ZZZ

Conference Number HiSST 2018_2760930

The lattice Boltzmann method, which is based on microscopic models and mesoscopic kinetic equations for particle distribution functions, has become a prominent tool in CFD. The 3D lattice Boltzmann method in the framework of coupled double-distribution-function approach for high-speed viscous flows, in which specific-heat ratio and Prandtl number can be adjustable, is developed and studied in this paper. Two types of equilibrium distribution functions are involved, which based on spherical function and Hermite basis, respectively. The two models are tested through numerical simulations of some typical compressible flows, and their numerical stability and precision are also analyzed. The results indicate that the two models are capable for high-speed flows, while the one based on Hermite expansions has numerical stability problem when dealing with compressible flows with shock waves. An artificial viscosity is introduced to enhance the latter model for capturing shock waves and the effect of artificial viscosity is estimated.

Read the full paper >

In Categories: High-Speed Aerodynamics and Aerothermodynamics, HiSST 2018, Hypersonic Aerodynamics, Hypersonic Flight Dynamics, Testing and Evaluation
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.