Zobrazeno 1 - 10
of 511
pro vyhledávání: '"Johnson, Ryan P."'
Autor:
Ching, Eric J., Johnson, Ryan F.
Standing detonation engines are a promising detonation-based propulsion technology. The most commonly studied standing detonation configuration involves a straight-sided wedge that induces an oblique detonation wave. A recently introduced standing-de
Externí odkaz:
http://arxiv.org/abs/2410.13845
Autor:
Ching, Eric J., Johnson, Ryan F.
This paper presents a conservative discontinuous Galerkin method for the simulation of supercritical and transcritical real-fluid flows without phase separation. A well-known issue associated with the use of fully conservative schemes is the generati
Externí odkaz:
http://arxiv.org/abs/2410.13810
A well-known issue associated with the use of fully conservative schemes in multicomponent-flow simulations is the generation of spurious pressure oscillations at contact interfaces. These oscillations can rapidly lead to solver divergence even in th
Externí odkaz:
http://arxiv.org/abs/2310.17792
This article concerns the development of a fully conservative, positivity-preserving, and entropy-bounded discontinuous Galerkin scheme for the multicomponent, chemically reacting, compressible Navier-Stokes equations with complex thermodynamics. In
Externí odkaz:
http://arxiv.org/abs/2310.17637
We consider the problem of estimating a vector of unknown constant parameters for a class of hybrid dynamical systems -- that is, systems whose state variables exhibit both continuous (flow) and discrete (jump) evolution. Using a hybrid systems frame
Externí odkaz:
http://arxiv.org/abs/2308.07516
Publikováno v:
J. Comput. Phys. 505 (2024) 112878
In this second part of our two-part paper, we extend to multiple spatial dimensions the one-dimensional, fully conservative, positivity-preserving, and entropy-bounded discontinuous Galerkin scheme developed in the first part for the chemically react
Externí odkaz:
http://arxiv.org/abs/2211.16297
Publikováno v:
J. Comput. Phys. 505 (2024) 112881
In this paper, we develop a fully conservative, positivity-preserving, and entropy-bounded discontinuous Galerkin scheme for simulating the chemically reacting, compressible Euler equations with complex thermodynamics. The proposed formulation is an
Externí odkaz:
http://arxiv.org/abs/2211.16254
Autor:
Sarkar, Arnab, Randall, Scott, Su, Yuanyuan, Alvarez, Gabriella E., Sarazin, Craig L., Jones, Christine, Blanton, Elizabeth, Nulsen, Paul, Chakraborty, Priyanka, Bulbul, Esra, Zuhone, John, Andrade-Santos, Felipe, Johnson, Ryan E.
We present deep Chandra observations of the pre-merger galaxy cluster Abell 98. Abell 98 is a complex merging system. While the northern (A98N) and central subclusters (A98S) are merging along the north-south direction, A98S is undergoing a separate
Externí odkaz:
http://arxiv.org/abs/2211.00130
Autor:
Sarkar, Arnab, Randall, Scott, Su, Yuanyuan, Alvarez, Gabriella E., Sarazin, Craig, Nulsen, Paul, Blanton, Elizabeth, Forman, William, Jones, Christine, Bulbul, Esra, Zuhone, John, Andrade-Santos, Felipe, Johnson, Ryan E., Chakraborty, Priyanka
We report the first unambiguous detection of an axial merger shock in the early-stage merging cluster Abell 98 using deep (227 ks) Chandra observations. The shock is about 420 kpc south from the northern subcluster of Abell 98, in between the norther
Externí odkaz:
http://arxiv.org/abs/2208.03401
Autor:
Johnson, Ryan F., Kercher, Andrew D.
We present a detailed description and verification of a discontinuous Galerkin finite element method (DG) for the multi-component chemically reacting compressible Navier-Stokes equations that retains the desirable properties of DG, namely discrete co
Externí odkaz:
http://arxiv.org/abs/2005.11376