High-order simulation of hypersonic nonequilibrium flows on overset grids

The time-accurate unsteady 3D compressible flow solver ADPDIS3D is supported by a grant from the Department of Energy (DOE) SciDAC program through the Science Application Partnership (SAP) initiative. The objective of this grant is to develop, implement and validate this variable high-order 3-D multiblock overlapping (overset) grid solver for turbulence with strong shocks and density variations. ADPDIS3D includes capabilities for both direct numerical simulation (DNS), resolving all scales of the flow fields, and large eddy simulation (LES) modeling the small turbulent scales. One of the unique features of the code is the ability to perform DNS and LES computations in non-trivial geometries through the use of overset curvilinear grids. ADPDIS3D contains a large number of high-order numerical schemes and shock-capturing numerical schemes for accurate unsteady computations for flow speeds that range from nearly incompressible to hypersonic speeds. Importantly, ADPDIS3D implements many innovative low dissipative algorithms that adaptively use numerical dissipation from shock-capturing schemes as post-processing filters on non-dissipative high-order centered schemes. These schemes were especially designed for improved accuracy over standard high-order shock-capturing schemes in capturing of turbulence with strong shocks and density variations. For a description of algorithms and their performances, including a detailed LES computation of temporal-evolving mixing layer, see e.g., Sj¨ogreen & Yee (2009), Yee & Sj¨ogreen (2006), Yee et al. (2008), Yee & Sj¨ogreen (2009), Yee et al. (2010), Wang et al. (2010), Hadjadj et al. (2010). Furthermore, ADPDIS3D contains solvers for standard compressible flow, compressible non-ideal MHD, and chemical nonequilibrium hypersonic flows. For a more detailed description see Sj¨ogreen et al. (2009)