eprintid: 10189602
rev_number: 6
eprint_status: archive
userid: 699
dir: disk0/10/18/96/02
datestamp: 2024-03-25 15:34:41
lastmod: 2024-03-25 15:34:41
status_changed: 2024-03-25 15:34:41
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Ji, Y
creators_name: Hosseini, SA
creators_name: Dorschner, B
creators_name: Luo, KH
creators_name: Karlin, IV
title: Eulerian discrete kinetic framework in comoving reference frame for hypersonic flows
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F45
note: This is an Open Access article,
distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/
licenses/by/4.0), which permits unrestricted re-use, distribution and reproduction, provided the original
article is properly cited.
abstract: Flow physics vary in different regimes across the full Mach number range, with our knowledge being particularly poor about the hypersonic regime. An Eulerian realization of the particles on demand method, a kinetic model formulated in the comoving reference frame, is proposed to simulate hypersonic compressible flows. The present model allows for flux evaluation in different reference frames, in this case rescaled and shifted by local macroscopic quantities, i.e. fluid speed and temperature. The resulting system of coupled hyperbolic equations is discretized in physical space with a finite volume scheme ensuring exact conservation properties. Regularization via Grad expansion is introduced to implement distribution function and flux transformation between different reference frames. It is shown that the proposed method possesses Galilean invariance at a Mach number up to 
	      
		
		$100$
	      
	    . Different benchmarks including both inviscid and viscous flows are reproduced with the Mach number up to 
	      
		
		$198$
	      
	     and pressure ratio up to 
	      
		
		$10^5$
	      
	    . Finally, the new model is demonstrated to be capable of simulating hypersonic reactive flows, including one-dimensional and two-dimensional detonations. The developed methodology opens up possibilities for the simulation of the full range of compressible flows, without or with chemical reactions, from the subsonic to hypersonic regimes, leading to enhanced understanding of flow behaviours across the full Mach number range.
date: 2024-03-18
date_type: published
publisher: Cambridge University Press (CUP)
official_url: http://dx.doi.org/10.1017/jfm.2024.94
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2261598
doi: 10.1017/jfm.2024.94
lyricists_name: Luo, Kai
lyricists_id: KLUOX54
actors_name: Flynn, Bernadette
actors_id: BFFLY94
actors_role: owner
full_text_status: public
publication: Journal of Fluid Mechanics
volume: 983
article_number: A11
citation:        Ji, Y;    Hosseini, SA;    Dorschner, B;    Luo, KH;    Karlin, IV;      (2024)    Eulerian discrete kinetic framework in comoving reference frame for hypersonic flows.                   Journal of Fluid Mechanics , 983     , Article A11.  10.1017/jfm.2024.94 <https://doi.org/10.1017/jfm.2024.94>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10189602/1/eulerian-discrete-kinetic-framework-in-comoving-reference-frame-for-hypersonic-flows.pdf