Conveners
State to state and Collisional Radiative Modelling: Monday afternoon 2
- Marco Panesi (University of California, Irvine)
State to state and Collisional Radiative Modelling: Tuesday afternoon 2
- Annarita Laricchiuta (CNR ISTP Bari)
State to state and Collisional Radiative Modelling: Wednesday morning 1
- Gianpiero Colonna (CNR-ISTP Bari)
State to state and Collisional Radiative Modelling: Wednesday morning 2
- Gianpiero Colonna (CNR-ISTP Bari)
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Cyrine Merhaben (EM2C Laboratory, CentraleSupélec, Université Paris Sacaly)21/09/2026, 16:00State to state and Collisional Radiative Modelling
This work aims to improve the prediction of CN electronic state populations in high temperature $\text{N}_2/\text{CH}_4$ plasmas, an essential prerequisite for robust radiative flux modeling during Titan entry [1], [2], [3]. We develop a comprehensive collisional radiative (CR) model that tracks all relevant global species as well as the ground state $\text{CN}(X^2\Sigma^+)$ and the first four...
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Emmanuel Scalera (CNR)21/09/2026, 16:30State to state and Collisional Radiative Modelling
The characterization of carbon monoxide thermochemistry is critical for aero-thermodynamic modeling of Mars and Venus atmospheric entry, where CO, resulting from carbon dioxide dissociation, is a predominant species in the high-enthalpy shock layer [1].
Accurate predictions of the shock layer properties rely on the fidelity of the underlying kinetic models. To this aim, the experimental...
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Gianpiero Colonna (CNR-ISTP Bari)21/09/2026, 17:00State to state and Collisional Radiative Modelling
Determination of internal thermodynamic properties of the species in a plasma is relevant for both theoretical and experimental aspect, also in non-equilibrium conditions. A critical aspect is to calculate the contribution to internal levels to the system enthalpy and to the equilibrium constants of relevant reactions [1]. The most accurate approach is to perform the Boltzmann summation on the...
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Francesco Bonelli (Politecnico di Bari)22/09/2026, 16:00State to state and Collisional Radiative Modelling
1. Background of the study
The renewed interest in space exploration has increased the need for accurate and affordable models of atmospheric-entry flows. During planetary entry, hypersonic vehicles travel at velocities of the order of 10 km/s, generating a detached bow shock and severe thermal loads on the surface. Reliable prediction of this aerothermodynamic environment is therefore...
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Antonio Narracci22/09/2026, 16:30State to state and Collisional Radiative Modelling
Background of the study
The dense and stable atmosphere characterizing Titan [1], Saturn's largest moon, make it a celestial body of great interest for the scientific community, as it may give insights into the formation of life [2], also due to the presence of organic compounds, such as methane.
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With the scheduled launch of the NASA mission Dragonfly [3], aiming to deliver a... -
Timothy Aiken (University of Colorado)23/09/2026, 09:00
Background
Recent years have seen a concerted effort to improve models of plasma formation in hypersonic flows. Validating these models has long been hampered by a lack of experimental data capable of characterizing ionization and its precursor processes -- electronic excitation in particular. Meeting this need requires shock tube experiments that probe the relevant species in suitable...
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Dr Marie-Claude DRUGUET (Aix-Marseille University - CNRS UMR 7343 - IUSTI)23/09/2026, 09:30State to state and Collisional Radiative Modelling
Key words
State-to-state modeling, hypersonic flow, aerothermodynamics, CFD.Introduction
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During the atmospheric entry of a spacecraft at hypervelocity, the gas in the shock layer goes through high temperatures and through various thermochemical non-equilibrium states. For decades, the scientific community has worked to better understand the behavior of excited species in... -
Marco Carpanese (Laboratoire EM2C, CNRS UPR-288, CentraleSupélec, Université Paris-Saclay and Università degli Studi di Padova)23/09/2026, 10:00State to state and Collisional Radiative Modelling
1. Introduction
The radiative heat flux on a capsule during atmospheric re-entry represents a significant fraction of the total flux on the backshell, and depends on the population of the excited energy levels in the plasma around the capsule. This population does not follow a Boltzmann distribution due to non-equilibrium recombination in the afterbody region.
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The Quasi-Steady State... -
Kaelan Hansson (AMA Inc at NASA Ames)23/09/2026, 11:00State to state and Collisional Radiative Modelling
Hypersonic computational fluid dynamics (CFD) codes must account for chemical and thermodynamic changes in the flow that occur at timescales that are similar to the flow time. These include chemical reactions such as dissociation and ionization as well as thermal relaxation. The relaxation terms account for the finite time required to excite (usually vibrationally or electronically) the atoms...
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Eric Geistfeld (AMA Inc. @ NASA Ames Research Center)23/09/2026, 11:30State to state and Collisional Radiative Modelling
Background
Titan's atmosphere is composed mostly of N$_2$ with small amounts of CH$_4$, and so, shock layers around craft entering Titan's atmosphere will contain a variety of molecules formed from H, C, and N atoms, including the cyanogen radical CN. Analysis has shown that the radiative heat flux predicted by computational fluid dynamics (CFD) simulations of Titan...
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