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- W2137182517 abstract "We present Galerkin finite element simulations of two- and three-dimensional fluid flow, thermal fields, and chemical species concentrations in micromachined chemical reactors. Such microchemical systems have potential for increased safety and on-demand manufacturing compared with conventional macroscopic reactors. The simulation approach incorporates a general mesh generation procedure that enables different microchemical reactor designs to be explored. The nonlinear differential-algebraic equations resulting from the finite element discretization are solved by Newton's method augmented with a pseudo-arc-length continuation scheme for tracing ignition and extinction points. The predicted temperature profiles are in good agreement with experimental data from temperature sensors located along the heater unit of the microreactor. The results also mirror observed ignition–extinction behavior by demonstrating that at low flow rates ignition occurs downstream and the reaction front subsequently travels upstream due both to heat conduction and the presence of fresh reactants upstream. Upstream movement of reaction front diminishes at high flow rates because significant reactions occurring downstream cause the downstream temperature to climb. The good agreement between simulated and observed results encourage further use of reaction engineering analysis and design tools in evaluation, scale-up, and application of microchemical systems." @default.
- W2137182517 created "2016-06-24" @default.
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- W2137182517 date "2000-01-01" @default.
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- W2137182517 title "Simulation of micromachined chemical reactors for heterogeneous partial oxidation reactions" @default.
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- W2137182517 doi "https://doi.org/10.1016/s0009-2509(99)00306-1" @default.
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