TY - CONF
T1 - On linear stability analyses of hypersonic laminar separated flows in a DSMC Framework Part II
T2 - 57th Israel Annual Conference on Aerospace Sciences, IACAS 2017
AU - Tumuklu, Ozgur
AU - Pérez, Jose Miguel
AU - Theofilis, Vassilis
AU - Levin, Deborah A.
N1 - Funding Information:
The research of OT and DL is being performed at the University of Illinois Urbana-Champaign, supported by the Air Force Office of Scientific Research through AFOSR Grant No. FA9550-11-1-0129 with a subcontract award number 2010-06171-01 to UIUC. This research is also a part of the Blue Waters sustained-petascale computing project, which is supported by the National Science Foundation (awards OCI-0725070 and ACI-1238993) and the state of Illinois. Blue Waters is a joint effort of the University of Illinois at Urbana-Champaign and its National Center for Supercomputing Applications. OT and DL are also grateful for the computational resource provided on ERDC Topaz, AFRL Spirit and Thunder. The work of VT and JMP is sponsored by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under Grant No. FA9550-15-1-0387 Global transient growth mechanisms in high-speed flows with application to the elliptic cone, with VT as Principal Investigator and Dr. Ivett Leyva as Program Officer. Access to the Copper Cray XE6m (https://www.ors.hpc.mil) has been provided by project AFVAW10102F62, with Dr. Nicholas Bisek as Principal Investigator, and is gratefully acknowledged. The U.S. Government is authorized to reproduce and distribute reprints for Governmental purpose not withstanding any copyright notation thereon.
PY - 2017
Y1 - 2017
N2 - Linear global instability analysis of hypersonic laminar separated flows over a double cone and a 'tick' configuration is performed. Statistical analysis of unsteady DSMC data yields the average damping rates of the respective least damped perturbations. The residuals algorithm is then used to predict the converged steady state at a fraction of the DSMC computational effort, as well as identify the amplitude functions of the underlying global modes of shock-dominated laminar separated flow. It is seen that the main flow features, such as the shape and location of the shock, the triple point and the entire laminar separated region, are clearly reflected in the amplitude functions of the global modes. First steps are taken toward self-consistent instability analysis of DSMC-based hypersonic flows, based on linearization of the probability distribution function. The viability of the approach is demonstrated in incompressible global stability analysis computations based on the Lattice Boltzmann method.
AB - Linear global instability analysis of hypersonic laminar separated flows over a double cone and a 'tick' configuration is performed. Statistical analysis of unsteady DSMC data yields the average damping rates of the respective least damped perturbations. The residuals algorithm is then used to predict the converged steady state at a fraction of the DSMC computational effort, as well as identify the amplitude functions of the underlying global modes of shock-dominated laminar separated flow. It is seen that the main flow features, such as the shape and location of the shock, the triple point and the entire laminar separated region, are clearly reflected in the amplitude functions of the global modes. First steps are taken toward self-consistent instability analysis of DSMC-based hypersonic flows, based on linearization of the probability distribution function. The viability of the approach is demonstrated in incompressible global stability analysis computations based on the Lattice Boltzmann method.
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M3 - Paper
AN - SCOPUS:85021334541
Y2 - 15 March 2017 through 16 March 2017
ER -