Validation of DSMC/Navier-Stokes Computations for Laminar Shock Wave/Boundary Layer Interactions in Hypersonic Flow

Abstract

Abstract. This paper discusses the recent progress with a validation exercise to examine the effectiveness of DSMC and NavierStokes in predicting complex flows involving shock/shock and shock/boundary layer interactions under laminar hypersonic conditions. The exercise is based on experiments conducted in the Aerothermal and Aero-Optics Evaluation Center shock tunnels using nitrogen. Under moderately rarefied conditions Navier-Stokes methods have performed very well in capturing the details of flow structure especially when non-equilibrium and slip effects are accounted for, whereas DSMC has not been as successful. In particular, the size of the separation regions is underestimated. This paper presents redefined test conditions accounting for vibrational non-equilibrium which have been substantiated by correlations obtained for pressure and heat transfer on the hollow cylinder and cone forebodies. Details are announced of two new lower density test conditions for future validation studies.

A new forward-backward sweeping parabolized Navier-Stokes algorithm with application to magnetohydrodynamic flows

“…Both methods agree closely with the experimental data of Holden [13]. In fact, in a "blind" code validation study [45] presented at the 39th Aerospace Sciences Meeting, the present results [9] agreed closer to the experimental data than did the other 4 numerical (3 NS and 1 Direct Simulation…”

Navier–Stokes and direct Monte-Carlo simulations of the circumnuclear gas coma

“…For that reason, usable but strictly speaking not rigorous schemes are in use, e.g., the NTC scheme of Bird (1994), and the MFS scheme of Ivanov and Rogasinsky (1988). Under such conditions, neither the physical relevance of a DSMC code is easy to establish (see, e.g., Harvey et al, 2003), nor its accuracy (e.g., Ivanov and Gimelshein, 2003). It is clearly beyond the scope of this paper to attempt to compute these properties.…”