Development of catalytic and ablative gas-surface interaction models for the simulation of reacting gas mixtures

Chatzigeorgis, Georgios Bellas; Turchi, Alessandro; Viladegut, Alan; Chazot, Olivier; Barbante, Paolo; Magin, Thierry

doi:10.2514/6.2017-4499

Cited by 9 publications

(9 citation statements)

References 18 publications

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“…For chemical reactions, mass rates and their analytical Jacobians with respect to species densities are provided by Mutation ++ . Finally, at catalytic and ablative surface boundaries a mass balance is solved directly by calling Mutation ++ [12,32]. It could be written for each species in the following form…”

Section: B Mutation ++ Library Couplingmentioning

confidence: 99%

“…where 𝛾 = F 𝑖,𝑟 𝑒𝑎𝑐𝑡 /F 𝑖,𝑖𝑚 𝑝𝑖𝑛 is the ratio of reacting to impinging species fluxes and it describes the efficiency of the process, and 𝑚 𝑖 is the mass of the 𝑖 th species [32]. Then, from the mass blowing rate 𝑚 = 𝑖 𝜔 𝑖,𝑤𝑎𝑙𝑙 , the blowing speed is calculated by…”

Section: B Mutation ++ Library Couplingmentioning

confidence: 99%

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Verification and Validation of Immersed Boundary Solvers for Hypersonic Flows with Gas-Surface Interactions

Başkaya

Capriati

Ninni

et al. 2022

AIAA AVIATION 2022 Forum

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During atmospheric entry, the flow environment around capsules or space debris is characterized by complex fluid thermochemistry and gas-surface interactions (GSI). Computational fluid dynamics (CFD) simulations of these conditions are crucial in the design process of such objects. A promising approach for the simulation of complex geometries is the use of immersed boundary methods (IBM) and adaptive mesh refinement techniques (AMR). These methods offer reliable and efficient mesh generation and adaptation with minimal user intervention. To that end, this paper presents the recent developments of two IBM-AMR solvers coupled with the same external thermochemistry library for the accurate modelling of such complex flows including GSI. Several verification and validation cases are presented, which demonstrate the performance of the solvers. Results are analyzed in comparison with a body-conforming solver that uses the same thermochemistry library to achieve a consistent assessment of the underlying numerical methods. A good agreement between all the solvers is indicated with certain discrepancies arising due to the differences in surface treatments.

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Section: B Mutation ++ Library Couplingmentioning

confidence: 99%

Section: B Mutation ++ Library Couplingmentioning

confidence: 99%

Verification and Validation of Immersed Boundary Solvers for Hypersonic Flows with Gas-Surface Interactions

Başkaya

Capriati

Ninni

et al. 2022

AIAA AVIATION 2022 Forum

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“…It can be computed using phenomenological or finite-rate chemistry models, as described in the following sections. Different fidelity models for chemical closures are available in MUTATION++ [1]. The gas state near the interface is obtained by solving the system (1) using a Newton method and the surface state is returned to the CFD solver.…”

Section: Gas-surface Interactionmentioning

confidence: 99%

“…Another strategy is to model this interaction as a boundary condition, the latter approach is followed in this study. In previous works, GSI models were abstracted in the MUTATION++ open source software [1,2] to provide a BC for chemical reacting surfaces. The MUlticomponent Thermodynamic And Transport properties for IONized gases library written in C++ (MUTATION++) has been developed at the von Karman Institute to help centralize physico-chemical models, algorithms, and data into a single software package, which may be shared among several CFD tools.…”

Section: Introductionmentioning

confidence: 99%

“…1, II) MUTATION++ being open source, different CFD solvers share the same features, helping with code-to-code comparisons, as well regular updates of the library. The GSI module of MUTATION++ has been used to model catalytic and ablative materials, both assuming thermal equilibrium and non-equilibrium (state-to-state catalysis or two temperature ablation) of the gas near the surface [1,3]. In this work, we extend the library to use a finite-rate chemistry model derived from beam experiments [4], for describing, among other reactions, surface nitridation and nitrogen recombination [5].…”

Section: Introductionmentioning

confidence: 99%

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Development of a Nitridation Gas-Surface Boundary Condition for High-Fidelity Hypersonic Simulations

Capriati¹,

Prata²,

Schwartzentruber³

et al. 2021

14th WCCM-ECCOMAS Congress

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Gas-surface interaction phenomena have a strong impact on the heat flux experienced by atmospheric entry bodies in the hypersonic regime. Numerically, they can be expressed as a boundary condition to be imposed to the Navier-Stokes equations to achieve predictive engineering simulations. The mass and energy conservation can be abstracted in a thin layer containing both the solid and the gas phases. Such a balance was implemented in the open source MUTATION++ library. It is convenient to easily plug verified models in any type of CFD solver to model the response of material surfaces. We have extended the library to accommodate a state-of-the-art nitridation and nitrogen recombination mechanisms derived from beam experiments. MUTATION++ was coupled to US3D, a high-fidelity finite-volume flow solver, to simulate an experimental campaign conducted in the VKI Plasmatron facility. The experiment consists in applying a subsonic high-enthalpy nitrogen flow over an axi-symmetric ablative material sample. The simulation results on the stagnation line were compared to those obtained using a one-dimensional solver. Both results showed good agreement, verifying the implementation of the boundary condition. The computational model predicts a lower mass blowing rate than the experimental value. The catalytic behaviour of the mechanism, in agreement with the beam experiment predictions, induces higher heat flux values than those expected for the testing conditions of the Plasmatron facility.

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Duplication of hypersonic stagnation-region aerothermochemistry and gas-surface interaction in high-enthalpy ground testing

et al. 2021

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Development of catalytic and ablative gas-surface interaction models for the simulation of reacting gas mixtures

Cited by 9 publications

References 18 publications

Verification and Validation of Immersed Boundary Solvers for Hypersonic Flows with Gas-Surface Interactions

Verification and Validation of Immersed Boundary Solvers for Hypersonic Flows with Gas-Surface Interactions

Development of a Nitridation Gas-Surface Boundary Condition for High-Fidelity Hypersonic Simulations

Duplication of hypersonic stagnation-region aerothermochemistry and gas-surface interaction in high-enthalpy ground testing

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