Abstract. We perform direct numerical simulations of impinging shock-boundary layer interaction on a flat plate, in which the shock is not orthogonal to boundary flow. The analysis relies an idealized configuration, where spanwise flow component used introduce effect sweep angle between statistically two-dimensional and shock. A quantitative comparison carried out swept case corresponding unswe...

The dynamics of wind-generated water waves in the principal stage Phillips theory (Phillips, J. Fluid Mech. , vol. 2, 1957, pp. 417–445) is investigated by a combined numerical and analytical approach. We perform number high-resolution direct simulation (DNS) turbulent wind over initially calm to capture multistage generation waves. Detailed analyses are conducted evaluate both physical space w...

Subgrid-scale (SGS) models for large eddy simulation (LES) have generally been evaluated by their ability to predict single-time statistics of turbulent ows such as kinetic energy and Reynolds stresses. Recent applications of large eddy simulation to the evaluation of sound sources in turbulent ows, a problem in which time correlations determine the frequency distribution of acoustic radiation,...

The statistical representation of a spray as a finite point process is investigated. One objective is to develop a better understanding of how single-point statistical information contained in descriptions such as the droplet distribution function ~ddf!, relates to the probability density functions ~pdfs! associated with the droplets themselves. Single-point statistical information contained in...

The analysis and investigation of the data obtained from Direct Numerical (DNS) simulation droplet dynamics in cloud turbulence is a complex time-consuming task when performaed on traditional computers. DNS generally have, high spatial resolution ≈ 1 mm require considerable space to store. It t...

The origin of initial streamwise vortices in braid regions and their relationship with deformed spanwise are numerically studied via direct numerical simulation (DNS) the compressible mixing layer a convective Mach number (Mc) 0.4. Through an analysis fast Fourier transform on DNS data, two low-rank velocity models (vd vs) developed to demonstrate that both all originated from linear superposit...

A new numerical approach for simulating nonlinear wavepackets in hypersonic boundary-layers is presented. The adaptive mesh refinement wavepacket tracking (AMR-WPT) method has been developed as an efficient alternative to conventional direct simulations (DNS). AMR-WPT employs the disturbances equations (NLDE), overset dual with higher-order interpolation, and (AMR) track boundary-layer flows. A...

This paper presents the results of implicit large eddy simulation (iLES) and direct numerical (DNS) for flow acoustics transitional turbulent boundary layer over a flat plate at Mach 6. The DNS was about 50 times more refined grid-wise than iLES. Both iLES were performed using same schemes, initial conditions. We compare different approaches concerning shape factor, momentum-thickness-based Rey...

Experience with fluid-flow simulation suggests that, in some instances, under-resolved direct numerical simulation (DNS), without a residual-stress model per se but with artificial damping of small scales to account for energy lost in the cascade from resolved to unresolved scales, may be as reliable as simulations based on more complex models of turbulence. One efficient and versatile manner t...