Article
Thermodynamics
Jeremie B. E. Meurisse, Georgios Bellas Chatzigeorgis, Patricia Ventura Diaz, Brody K. Bessire, Francesco Panerai, Nagi N. Mansour
Summary: A novel model for NASA's Phenolic Impregnated Carbon Ablator (PICA) is presented, considering the effect of a silicone over-coat and analyzing mass and heat transfer. The simulations agree with experiments and reproduce measured temperature and recession.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Geosciences, Multidisciplinary
J. Michael Battalio, German Martinez, Claire Newman, Manuel de la Torre Juarez, Agustin Sanchez-Lavega, Daniel Viudez-Moreiras
Summary: The study uses measurements from Perseverance and Mars Science Laboratory to observe planetary waves on Mars with periods of 1.5-30 sols. These waves affect various atmospheric variables including temperature, winds, surface pressure, and relative humidity. The detection of waves in multiple variables within Gale and Jezero craters indicates that planetary-scale dynamics play a role in influencing local weather on Mars.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
M. Millan, A. J. Williams, A. C. McAdam, J. L. Eigenbrode, A. Steele, C. Freissinet, D. P. Glavin, C. Szopa, A. Buch, R. E. Summons, J. M. T. Lewis, G. M. Wong, C. H. House, B. Sutter, O. McIntosh, A. B. Bryk, H. B. Franz, C. Pozarycki, J. C. Stern, R. Navarro-Gonzalez, D. P. Archer, V Fox, K. Bennett, S. Teinturier, C. Malespin, S. S. Johnson, P. R. Mahaffy
Summary: The Sample Analysis at Mars (SAM) suite instrument on NASA's Curiosity rover has analyzed the chemical composition of samples from the GT clay-bearing unit at Gale crater on Mars. The analysis revealed a diverse range of organic molecules, including sulfur-bearing aliphatic and aromatic compounds. It also detected nitrogen-containing, oxygen-containing, and chlorine-containing molecules, as well as polycyclic aromatic hydrocarbons. The findings suggest that the clay minerals in the GT unit played a role in preserving ancient organic matter on Mars. These discoveries deepen our understanding of the habitability and potential for life on Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Geochemistry & Geophysics
D. Viudez-Moreiras, M. Richardson, C. E. Newman
Summary: This study analyzes the constraints of TGO and MSL on the hypothetical location of methane emission sources responsible for the detected levels. The simulations suggest that localized emissions in the northwest interior of Gale Crater are likely the source of both methane spikes and background measurements by MSL. Other emission source locations within Gale Crater may not align with current observations by MSL and TGO.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Thermodynamics
Robert L. McMasters, Robert Fricke, Grayson Larus, Mason Malone, Michael Hutwelker
Summary: A numerical model was developed using data from the Mars Science Laboratory mission to determine the ablation rate of thermal protection systems, taking into account ablation and temperature-dependent thermal properties. By considering ablation and refining temperature-dependent thermal properties, a significant reduction in residuals between the mathematical model and measured temperatures was achieved.
JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER
(2021)
Article
Engineering, Aerospace
Savio J. Poovathingal, Hailong Chen
Summary: This paper presents the application of a novel computational technique to study the damage caused by micron-sized particles in planetary atmospheres to thermal protection systems. By comparing simulation results with experiments and modeling damage on carbon composites, the researchers reveal the formation patterns and influencing factors of damaged regions.
Article
Geochemistry & Geophysics
Scott D. Guzewich, Emily L. Mason, Mark T. Lemmon, Claire E. Newman, Kevin W. Lewis
Summary: Martian dust lifting occurs through two primary mechanisms: dust devils and wind stress forced lifting. The Curiosity rover's Navigation Cameras have captured numerous image sequences to search for dust lifting in the Gale Crater. Through analyzing a large catalog of dust lifting events, it is found that dust lifting in Gale Crater is frequent throughout the Martian year, with a peak in frequency near solar noon, and it often occurs on sand-covered surfaces, indicating the importance of sand grains for Martian dust lifting.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geochemistry & Geophysics
Scott D. Guzewich, Emily L. Mason, Mark T. Lemmon, Claire E. Newman, Kevin W. Lewis
Summary: Dust lifting in Gale Crater on Mars occurs throughout the Martian year and is most frequent around solar noon. The motion of sand grains on sand-covered terrains plays an important role in dust lifting. Approximately 42.7% of all image sequences captured by the Mars Science Laboratory Curiosity rover's Navigation Cameras showed active dust lifting.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
News Item
Multidisciplinary Sciences
Alexandra Witze
Summary: The Mars helicopter's creation of "cool" dust clouds has unexpectedly provided researchers with new insight into natural "dust devils" on the red planet.
Article
Spectroscopy
Patrick J. Gasda, Ryan B. Anderson, Agnes Cousin, Olivier Forni, Samuel M. Clegg, Ann Ollila, Nina Lanza, Jens Frydenvang, Sarah Lamm, Roger C. Wiens, Sylvestre Maurice, Olivier Gasnault, Roberta Beal, Adriana Reyes-Newell, Dorothea Delapp
Summary: The new calibration model for manganese, developed using an expanded set of standards, shows high accuracy with a Root Mean Squared Error of Prediction of 1.39 wt% MnO for the full blended model on a test set of 93 standards. The detection limit for manganese is determined to be 82 ppm, possibly as low as 27 ppm based on visual inspection of the spectra.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
News Item
Multidisciplinary Sciences
Alexandra Witze
Summary: NASA's Ingenuity helicopter successfully hovered for 40 seconds in Mars's thin atmosphere.
Article
Engineering, Aerospace
Bi Zhao, Jingzhou Zhang, Wenlei Lian
Summary: This study conducted a numerical investigation and experimental validation of enhancing heat transfer efficiency in a 3D-printed shell-and-tube heat exchanger using a porous media model, demonstrating that the simplified approach can accurately predict pressure drop and heat transfer efficiency.
Article
Chemistry, Multidisciplinary
Xin Mai, Ning Wu, Qun Nan, Sixin Bi
Summary: Microwave ablation is an emerging method for treating lung cancer, which has advantages of being less invasive and having fewer side effects compared with surgery and chemotherapy. This study established a two-dimensional simulation model to investigate the effects of tumor diameter, tumor porosity, and microwave ablation power on the temperature, area, and volume of tumor tissue.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Interdisciplinary Applications
Pawel Jan Zuk, Bartosz Tuznik, Tadeusz Rymarz, Kamil Kwiatkowski, Marek Dudynski, Flavio C. C. Galeazzo, Guenther C. Krieger Filho
Summary: This paper presents the porousGasificationFoam solver and libraries, developed in the open-source C++ code OpenFOAM, for comprehensive simulation of thermochemical conversion in porous media. The model is validated against experimental and theoretical results, showing its accuracy and precision, as well as the influence of porous media size on the gasification process.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
News Item
Multidisciplinary Sciences
Alexandra Witze
Summary: After completing its first year on Mars, Perseverance will explore an ancient delta in search of evidence of past life.
Article
Engineering, Aerospace
M. Rivier, J. Lachaud, P. M. Congedo
AEROSPACE SCIENCE AND TECHNOLOGY
(2019)
Article
Thermodynamics
Revathi Jambunathan, Deborah A. Levin, Arnaud Borner, Joseph C. Ferguson, Francesco Panerai
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Chemistry, Analytical
Francisco Torres-Herrador, Jeremie B. E. Meurisse, Francesco Panerai, Julien Blondeau, Jean Lachaud, Brody K. Bessire, Thierry E. Magin, Nagi N. Mansour
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2019)
Article
Thermodynamics
Francesco Panerai, Thom Cochell, Alexandre Martin, Jason D. White
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Engineering, Aerospace
F. Torres-Herrador, V. Leroy, B. Helber, L. Contat-Rodrigo, J. Lachaud, T. Magin
Article
Materials Science, Multidisciplinary
Federico Semeraro, Joseph C. Ferguson, Francesco Panerai, Robert J. King, Nagi N. Mansour
COMPUTATIONAL MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Federico Semeraro, Joseph C. Ferguson, Marcos Acin, Francesco Panerai, Nagi N. Mansour
Summary: Micro-scale modeling is used to predict the effective thermal conductivity of anisotropic materials based on three-dimensional reconstruction of fibrous structure. The algorithm takes into account multiple scales of anisotropy and is validated against experiments, ultimately reverse engineering the orthotropic conductivity of a single carbon fiber.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Cyril Levet, Jean Lachaud, Virginie Ducamp, Regis Memes, Jacques Couzi, Julien Mathiaud, Adrien P. Gillard, P. Weisbecker, Gerard L. Vignoles
Summary: The study focused on the ablation behavior of 3D carbon-fibre reinforced carbon composites during atmospheric re-entry, revealing that fibers recede faster than the matrix. Structural characterization of the composite surface was conducted using scanning electron microscopy and digital optical microscopy.
Article
Chemistry, Multidisciplinary
Hermes Scandelli, Azita Ahmadi-Senichault, Franck Richard, Jean Lachaud
Summary: Numerical simulation of fire propagation involves capturing the coupling between wood pyrolysis and the combustion of various gaseous species in the flame to predict the rate of production and chemical nature of pyrolysis gases more accurately. Introducing different pyrolysis species impacts the temperature and behavior of the flame during the simulation.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Aerospace
Przemyslaw Rostkowski, Jeremie B. E. Meurisse, John M. Thornton, Ralph C. Smith, Marco Panesi
Summary: The study reveals that lower-dimensional approaches can be used for initial parameter screening, but obtained sensitivities may differ. Coarse computational grids can accurately perform screening and quantitative sensitivity analysis, even with non-negligible residual values.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Jeremie B. E. Meurisse, Alejandro Alvarez Laguna, Marco Panesi, Nagi N. Mansour
Summary: Arc jets are unique facilities for evaluating the performance of Thermal Protection Systems (TPS) for hypersonic vehicles. This study developed a three-dimensional unsteady plasma flow analysis tool, ARCHeS, to simulate the flow characteristics of high pressure and high enthalpy arc heaters and capture kink instabilities of the electric arc.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
H. Scandelli, A. Ahmadi-Senichault, C. Levet, J. Lachaud
Summary: The direct proportionality between flow rate and pressure gradient in creeping flows was experimentally discovered in the 19th century and theoretically justified using upscaling methods such as volume averaging or homogenization. X-ray computed micro-tomography (CMT) and pore-scale numerical simulations are increasingly being used to estimate the permeability of porous media. However, the numerical definition of non-periodic anisotropic porous media still needs to be completely defined.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Chemistry, Multidisciplinary
Alexandre Vicard, Olivier Atteia, Henri Bertin, Jean Lachaud
Summary: This paper studies the behavior of foam in a porous medium and the effect of fluid velocity on foam properties. A new method of estimating foam model parameters is proposed and tested using column experiments. The results are analyzed to understand the existence of two shear effects and their origins.
Article
Thermodynamics
Jeremie B. E. Meurisse, Georgios Bellas Chatzigeorgis, Patricia Ventura Diaz, Brody K. Bessire, Francesco Panerai, Nagi N. Mansour
Summary: A novel model for NASA's Phenolic Impregnated Carbon Ablator (PICA) is presented, considering the effect of a silicone over-coat and analyzing mass and heat transfer. The simulations agree with experiments and reproduce measured temperature and recession.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Aerospace
Andre F. P. Ribeiro, Carlos Ferreira, Damiano Casalino
Summary: This study compares a filament-based free wake panel method to experimental and validated numerical data in order to simulate propeller slipstreams and their interaction with aircraft components. The results show that the free wake panel method is able to successfully capture the slipstream deformation and shearing, making it a useful tool for propeller-wing interaction in preliminary aircraft design.
AEROSPACE SCIENCE AND TECHNOLOGY
(2024)