Computational simulations of near-continuum gas flow using Navier-Stokes-Fourier equations with slip and jump conditions based on the modal discontinuous Galerkin method
作者机构：School of Mechanical and Aerospace Engineering and ACTRC&ReCAPTGyeongsang National UniversityJinjuGyeongnam 52828South Korea School of Physical and Mathematical SciencesNanyang Technological University21 Nanyang LinkSingapore 637371Singapore
出 版 物：《Advances in Aerodynamics》 (空气动力学进展（英文）)
年 卷 期：2020年第2卷第1期
页 面：145-181页
学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学]
基 金：the National Research Foundation of Korea funded by the Ministry of Education Science and Technology(NRF 2017-R1A2B2007634) South Korea
主 题：Near-continuum flow Discontinuous Galerkin method Slip and jump conditions
摘 要：Blunt-body configurations are the most common geometries adopted for non-lifting re-entry *** re-entry vehicles experience different flow regimes during flight due to drastic changes in atmospheric *** conventional Navier-Stokes-Fourier equations with no-slip and no-jump boundary conditions may not provide accurate information regarding the aerothermodynamic properties of blunt-bodies in flow regimes away from the *** addition,direct simulation Monte Carlo method requires significant computational resources to analyze the near-continuum flow *** overcome these shortcomings,the Navier-Stokes-Fourier equations with slip and jump conditions were numerically solved.A mixed-type modal discontinuous Galerkin method was employed to achieve the appropriate numerical *** computational simulations were conducted for different blunt-body configurations with varying freestream Mach and Knudsen *** results show that the drag coefficient decreases with an increased Mach number,while the heat flux coefficient *** the other hand,both the drag and heat flux coefficients increase with a larger Knudsen ***,for an Apollo-like blunt-body configuration,as the flow enters into non-continuum regimes,there are considerable losses in the lift-to-drag ratio and stability.
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