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A steady-state continuous flow chamber for the study of daytime and nighttime chemistry under atmospherically relevant NO levels [PDF]
Atmospheric Measurement Techniques, 2018 Experiments performed in laboratory chambers have contributed significantly to the understanding of the fundamental kinetics and mechanisms of the chemical reactions occurring in the atmosphere. Two chemical regimes, classified as high-NO vs.
X. Zhang +7 more
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Desorption processes in molecular clouds: quasi-steady-state chemistry [PDF]
Monthly Notices of the Royal Astronomical Society, 1993 The effects of mantle desorption due to cosmic rays on the chemistry of interstellar clouds are modelled. Two desorption mechanisms are considered - direct cosmic ray heating of dust grains and cosmic ray induced photodesorption. Their effects at densities typical of a molecular cloud and a dense core are investigated.
Karen Willacy, D. A. Williams
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Symbolic construction of the chemical Jacobian of quasi-steady state (QSS) chemistries for Exascale computing platforms [PDF]
Combustion and FlameThe Quasi-Steady State Approximation (QSSA) can be an effective tool for reducing the size and stiffness of chemical mechanisms for implementation in computational reacting flow solvers. However, for many applications, stiffness remains, and the resulting model requires implicit methods for efficient time integration.
Malik Hassanaly +7 more
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Flame Chemistry in the ISO/TS 19700 Steady State Tube Furnace
, 2023 The steady state tube furnace (SSTF) (ISO/TS 19700) was used to assess the effects altering the reaction zone of a flame had on smoke toxicity measurements. The gas inlet of the apparatus was modified to allow for a mixture of nitrogen and air to be introduced into the system.
Gabrielle Peck, R Robert Hayes
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Volume 2: Emissions Control Systems; Instrumentation, Controls, and Hybrids; Numerical Simulation; Engine Design and Mechanical Development, 2018 The prospect of analysis-driven pre-calibration of a modern diesel engine is extremely valuable in order to significantly reduce hardware investments and accelerate engine designs compliant with stricter EPA fuel economy regulations. Advanced modeling tools, such as CFD, are often used with the goal of streamlining significant portions of the ...
Jian Gao +7 more
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Steady-State Distributions of O2 and OH in the High Atmosphere and Implications in the Ozone Chemistry [PDF]
The Journal of Physical Chemistry A, 2003 Although steady-state distributions are commonly accepted to be of the Boltzmann-type, such an assumption can be rather unrealistic when modeling the high atmosphere. Corroborating evidence is reported for the vibrationaland rotational distributions of O 2 and OH from detailed trajectory calculations, which shows that the thermalization assumption is ...
A. J. C. Varandas
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Steady-State Calibration of a Diesel Engine in CFD Using a GPU-Based Chemistry Solver
Journal of Engineering for Gas Turbines and Power, 2017 The prospect of analysis-driven precalibration of a modern diesel engine is extremely valuable in order to significantly reduce hardware investments and accelerate engine designs compliant with stricter fuel economy regulations. Advanced modeling tools, such as CFD, are often used with the goal of streamlining significant portions of the calibration ...
Jian Gao +7 more
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, 2018 Steady-state and time-resolved fluorescence techniques enjoy widespread applicability in domains ranging from biology to materials science owing to their extraordinary sensitivity and dynamic range. Among the most useful of these techniques is time-correlated, single-photon counting, which forms the basis of another: fluorescence lifetime imaging using
Kalyan Santra
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Multiple Transients in the Pre-Steady-State of Nucleoside Hydrolase Reveal Complex Substrate Binding, Product Base Release, and Two Apparent Rates of Chemistry [PDF]
Biochemistry, 2006 We have investigated the transient kinetics of the nucleoside hydrolase from Trypanosoma vivax (TvNH) at low temperatures (5 degrees C). Three novel absorbance transients (termed tau1, tau3, and tau4) were detected during multiple-guanosine turnover stopped-flow absorbance spectroscopy, in addition to a transient (tau2) that had been observed ...
An Vandemeulebroucke +3 more
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