Results 251 to 260 of about 117,106 (293)
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Intrinsic combustion instability of solid energetic materials
Journal of Propulsion and Power, 1995In the first part, a review is offered of the intrinsic stability of pressure- or radiation-driven burning of solid propellants with chemically inert condensed phase. The two main approaches today available [flame modeling and the Zeldovich-Novozhilov (ZN) method] are both considered.
DE LUCA, LUIGI +2 more
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Intrinsic thermoacoustic instability of premixed flames
Combustion and Flame, 2015Abstract The thermoacoustic stability of velocity sensitive premixed flames is investigated. A causal representation of the flow-flame-acoustic interactions reveals a flame-intrinsic feedback mechanism. The feedback loop may be described as follows: An upstream velocity disturbance induces a modulation of the heat release rate, which in turn ...
Thomas Emmert +2 more
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Intrinsic instability and nonuniformity of plastic deformation
International Journal of Plasticity, 1997In agreement with works of D. C. Drucker and Ming Li in the early 1990s, where it was concluded that plastic deformation is an intrinsically unstable process in initially homogeneous materials that obey a nonassociated flow rule, it is shown here that using the observed small non-normality, the predicted critical hardening modulus for the onset of ...
Li, Ming, Richmond, O.
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Intrinsic nonaxisymmetric instabilities in galaxy rings
New Astronomy, 1997Abstract We have investigated numerically the stability and temporal evolution of two-dimensional self-gravitating galaxy rings with flat rotation curves. The initial equilibrium models are composed of a polytropic fluid characterized by various polytropic indices (n = 0.5, 1, 1.5, 3, and 5) and embedded in a rigid scale-free logarithmic potential ...
Dimitris M. Christodoulou +2 more
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Control of intrinsic instability of superelastic deformation
International Journal of Plasticity, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Slutsker, Julia, Roytburd, Alexander L.
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Intrinsic instability of nanocrystalline metals
Acta Metallurgica et Materialia, 1992Abstract With a macroscopic analysis, similar to Raj [ Acta metall. 38, 1413 (1990)], premelting at higher order grain junctions, especially at four grain junctions, is discussed. The calculation is applied to nanocrystalline (nc) metals. It is found that nc-metals become unstable at the critical temperature T c . This temperature can be regarded
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Intrinsic Instabilities in Homogeneously Broadened Lasers
Topical Meeting on Optical Bistability, 1983Experimental observation has shown that it is no simple matter to make a homogeneously broadened laser operate in a single longitudinal mode. However, elementary theoretical treatments of homogeneously broadening predict that such lasers can operate in only a single mode, because all of the atoms constituting the gain medium experience identical ...
Lloyd W. Hillman +3 more
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Nonlinear effects of the surface-helical instability in intrinsic or nearly intrinsic Ge
Soviet Physics Journal, 1985Results are presented of a numerical calculation of the threshold and nonlinear SHI characteristics in cylindrical germanium specimens. It is shown that in sufficiently thick intrinsic or nearly intrinsic specimens an explosive SHI excitation regime is possible.
G. F. Karavaev, N. L. Chuprikov
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Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite
Advanced Energy Materials, 2015Organolead halide perovskites currently are the new front‐runners as light absorbers in hybrid solar cells, as they combine efficiencies passing already 20% with deposition temperatures below 100 °C and cheap solution‐based fabrication routes. Long‐term stability remains a major obstacle for application on an industrial scale.
Conings Bert +11 more
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