Francesco Bonelli , Davide Ninni , Antonio Narracci , Gianpiero Colonna , Giuseppe Pascazio
{"title":"用有限体积求解器评估高超声速中性气流的一致多内温动力学模型","authors":"Francesco Bonelli , Davide Ninni , Antonio Narracci , Gianpiero Colonna , Giuseppe Pascazio","doi":"10.1016/j.compfluid.2025.106796","DOIUrl":null,"url":null,"abstract":"<div><div>A multi-internal-temperature approach for hypersonic air kinetics has been consistently derived from the state-specific vibrational kinetics. Vibrational levels have been grouped in a limited number of subsets (one to five), each one characterized by its own concentration and temperature, approximating the entire distribution as a piecewise Boltzmann. The capability of the reduced-order model in terms of accuracy and computational savings has been tested comparing the results with those obtained using the state-to-state approach. Firstly, a 0D heat bath evolution in thermochemical non-equilibrium is considered. Then, the proposed model has been implemented in a finite volume solver for the solution of the Euler equations, employing a Flux Vector Splitting scheme with MUSCL reconstruction, and used to solve an axisymmetric hypersonic flow past a sphere.</div></div>","PeriodicalId":287,"journal":{"name":"Computers & Fluids","volume":"301 ","pages":"Article 106796"},"PeriodicalIF":3.0000,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Assessment of a consistent multi-internal-temperature kinetic model for hypersonic neutral air flows using a finite volume solver\",\"authors\":\"Francesco Bonelli , Davide Ninni , Antonio Narracci , Gianpiero Colonna , Giuseppe Pascazio\",\"doi\":\"10.1016/j.compfluid.2025.106796\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A multi-internal-temperature approach for hypersonic air kinetics has been consistently derived from the state-specific vibrational kinetics. Vibrational levels have been grouped in a limited number of subsets (one to five), each one characterized by its own concentration and temperature, approximating the entire distribution as a piecewise Boltzmann. The capability of the reduced-order model in terms of accuracy and computational savings has been tested comparing the results with those obtained using the state-to-state approach. Firstly, a 0D heat bath evolution in thermochemical non-equilibrium is considered. Then, the proposed model has been implemented in a finite volume solver for the solution of the Euler equations, employing a Flux Vector Splitting scheme with MUSCL reconstruction, and used to solve an axisymmetric hypersonic flow past a sphere.</div></div>\",\"PeriodicalId\":287,\"journal\":{\"name\":\"Computers & Fluids\",\"volume\":\"301 \",\"pages\":\"Article 106796\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2025-08-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computers & Fluids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0045793025002567\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers & Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0045793025002567","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
Assessment of a consistent multi-internal-temperature kinetic model for hypersonic neutral air flows using a finite volume solver
A multi-internal-temperature approach for hypersonic air kinetics has been consistently derived from the state-specific vibrational kinetics. Vibrational levels have been grouped in a limited number of subsets (one to five), each one characterized by its own concentration and temperature, approximating the entire distribution as a piecewise Boltzmann. The capability of the reduced-order model in terms of accuracy and computational savings has been tested comparing the results with those obtained using the state-to-state approach. Firstly, a 0D heat bath evolution in thermochemical non-equilibrium is considered. Then, the proposed model has been implemented in a finite volume solver for the solution of the Euler equations, employing a Flux Vector Splitting scheme with MUSCL reconstruction, and used to solve an axisymmetric hypersonic flow past a sphere.
期刊介绍:
Computers & Fluids is multidisciplinary. The term ''fluid'' is interpreted in the broadest sense. Hydro- and aerodynamics, high-speed and physical gas dynamics, turbulence and flow stability, multiphase flow, rheology, tribology and fluid-structure interaction are all of interest, provided that computer technique plays a significant role in the associated studies or design methodology.