Thermal Modeling of an eVinci™-like heat pipe microreactor using OpenFOAM
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Nuclear Science & Technology↗
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Results for “Thermalization”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Nuclear microreactors and thermal integration with hydrogen generation processes
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Nuclear Science & Technology↗
Molecular heterogeneity in pyrogenic dissolved organic matter from a thermal series of oak and grass chars
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99 GENERAL AND MISCELLANEOUS↗
Uncertainty quantification of thermal gap widths on internal temperatures in the TN-32B HBU demo cask
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Nuclear Science & Technology↗
Styrene Thermal Decomposition and Its Reaction with Acetylene under Shock Tube Pyrolysis Conditions: an Experimental and Kinetic Modeling Study
Styrene is an important compound for polymer production and a key intermediate in gas-phase kinetics of polycyclic aromatic hydrocarbons (PAHs). For the first time, the pyrolysis of styrene with and without the presence of acetylene is investigated in a single-pulse shock tube coupled to gas chromatography and mass spectrometry. For each reaction system, quantitative speciation profiles are probed within the temperature range of 1100-1730 K, nominal pressure of 20 bar, and reaction duration of similar to 4 ms. A kinetic model is built to simulate the results. The model explains how styrene is consumed under high-pressure pyrolytic conditions, how the secondary chemistry of intermediate products affect subsequent PAH formation, and how acetylene addition alters the reaction pathways. Throughout the temperature range, styrene breakdown is dominated by the bimolecular interaction between styrene and hydrogen atom, which produces benzene+vinyl or phenyl and ethylene through the stabilization of 2-phenylethyl and its subsequent dissociation. As a result, large amounts of phenyl accumulate, which react with styrene to form C14H12 species while simultaneously releasing H atoms through addition/elimination reactions. The reactivity of fuel consumption is preserved by the regeneration of H atoms as chain carriers. Several C14H10 compounds are formed as a result of the following breakdown of the C14H12 isomers, particularly stilbene, 1,1-diphenyl ethylene, and 9-methyl-9H-fluorene. The presence of acetylene as a co-reactant with styrene allows the Hydrogen-Abstraction-Acetylene-Addition (HACA) pathway to proceed from phenyl radical to enhance the production of phenylacetylene at very low temperatures and acenaphthylene. This hinders the formation of C14H12 isomers, exclusive products from pure styrene dissociation by competing with the styrene+phenyl routes.
Kinetic Modeling↗
Tailoring the thermal stability of nanocrystalline Ni alloy by thick grain boundaries
Not provided.
Materials Science↗
Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers
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Materials Science↗
Identification of Radiolytically-Active Thermal Transition Phases in Boehmite
Abstract not provided
Huestis, Patricia L.↗
Thermal Expansion, Response to Pressure, and Reversible PressureInduced Amorphization in Anion Excess ReO[subscript 3]-Type Cubic LuZrF[subscript 7]
Abstract not provided
Lloyd, II, Anthony J.↗
Reply to “Comment on ‘Dynamics of Phospholipid Membranes beyond Thermal Undulation’”
Recently, Granek postulated a connection of the Brochard-Lennon (BL) “red blood cell” mode with the short time relaxation of liposomes observed by neutron spin echo (NSE) spectroscopy. The experimental observations themselves clearly exclude this BL mode as an explanation. Here, we emphasize that it is an inherent behavior of lipids detectable with different techniques.
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗