Projects per year
Abstract
This paper investigates the use of Navier-Stokes-Fourier equations with non-equilibrium boundary conditions (BCs) for simulation of rarefied hypersonic flows. It revisits a largely forgotten derivation of velocity slip and temperature jump by Patterson, based on Grad’s moment method. Mach 10 flow around a cylinder and Mach 12.7 flow over a flat plate are simulated using both computational fluid dynamics using the temperature jump BCs of Patterson and Smoluchowski and the direct simulation Monte-Carlo (DMSC) method. These flow exhibit such strongly non-equilibrium behaviour that, following Patterson’s analysis, they are strictly beyond the range of applicability of the BCs. Nevertheless, the results using Patterson’s temperature jump BC compare quite well with the DSMC and are consistently better than those using the standard Smoluchowski temperature jump BC. One explanation for this better performance is that an assumption made by Patterson, based on the flow being only slightly non-equilibrium, introduces an additional constraint to the resulting BC model in the case of highly non-equilibrium flows.
Original language | English |
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Pages (from-to) | 80-87 |
Journal | Progress in Aerospace Sciences |
Volume | 52 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jul 2012 |
Keywords
- high-speed flow
- thermodynamic non-equilibrium
- boundary conditions
- compressible flows
- simulation
- rarefied gas dynamics
- temperature-jump
- velocity slip
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Dive into the research topics of 'Rarefied hypersonic flow simulations using the Navier-Stokes equations with non-equilibrium boundary conditions'. Together they form a unique fingerprint.Projects
- 3 Finished
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E Infrastructure Bid - Recurrent Costs Bid
Littlejohn, D. (Principal Investigator), Fedorov, M. (Co-investigator), Mulheran, P. (Co-investigator) & Reese, J. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/04/12 → 31/03/13
Project: Research
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E Infrastructure Bid - Capital Equipment Bid
Littlejohn, D. (Principal Investigator), Fedorov, M. (Co-investigator), Mulheran, P. (Co-investigator) & Reese, J. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
20/01/12 → 31/03/12
Project: Research
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Extended Continuum Models for Transient and Rarefied Hypersonic Aerothermodynamics
Reese, J. (Principal Investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/11/07 → 31/10/10
Project: Research