Results 271 to 280 of about 1,563,368 (312)
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2009
Chapter 7 is devoted to the critical multiphase flow. It starts with the mathematical definition of the criticality condition, with the appropriate design of a numerical grid structure and numerical iteration strategy. Then the methods used in the modern design are presented starting from the simple models and increasing gradually the complexity. First
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Chapter 7 is devoted to the critical multiphase flow. It starts with the mathematical definition of the criticality condition, with the appropriate design of a numerical grid structure and numerical iteration strategy. Then the methods used in the modern design are presented starting from the simple models and increasing gradually the complexity. First
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Critical Layers m Parallel Flows
Studies in Applied Mathematics, 1972Finite amplitude neutrally stable two‐dimensional disturbances in parallel flows are determined for large Reynolds numbers when both nonlinearity and viscosity are important in the critical layer. The phase shift across the critical layer depends on the local vertical Reynolds number in the critical layer, and it varies monotonically between the value ...
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Critical analysis of the particle flow filter
2015 International Conference on Control, Automation and Information Sciences (ICCAIS), 2015The particle flow filter (PFF) has been claimed to have superior performance in terms of accuracy and computational speed compared with existing nonlinear filters. We carefully examine the PFF algorithm and homotopy used in the PFF. We find three problems in the formulation of the PFF. First, homotopy used in the PFF violates the definition of homotopy.
Mahendra Mallick, Sindhu B.
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Critical Flow Properties of Steam
SPE Latin America Petroleum Engineering Conference, 1990ABSTRACT Understanding the thermodynamic properties of steam at critical flow conditions is important to the design, operation and management of steam distribution network and hence the cost of production in steam-enhanced recovery projects.
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1983
Starting from the definition of critical flows, the methods used for modeling are summarized. It appears that difficulties arise from the various nature of the laws governing mass, momentum and energy transfers through the interfaces. As a consequence, the flow conditions need to be well specified prior to start any modeling.
M. Giot, A. Fritte
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Starting from the definition of critical flows, the methods used for modeling are summarized. It appears that difficulties arise from the various nature of the laws governing mass, momentum and energy transfers through the interfaces. As a consequence, the flow conditions need to be well specified prior to start any modeling.
M. Giot, A. Fritte
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A design flow for critical embedded systems
International Symposium on Industrial Embedded System (SIES), 2010The SoCKET project (SoC1 toolKit for critical Embedded sysTems)2 gathers industrial and academic partners to address the issue of design methodologies for critical embedded systems. They work towards the definition of a “seamless” design flow which integrates qualification and certification, from the system level to integrated circuits and to software.
Vincent Lefftz +9 more
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Unsteady Near‐Critical Flows in Microgravity
Annals of the New York Academy of Sciences, 2004Abstract: This paper presents analysis of the different time scales associated with unsteady fluid flow phenomena near the thermodynamical critical point and that are typical for experiments carried out in microgravity. A focus of the paper is modeling the initial stage of convection under low and zero gravity on the basis of the two‐dimensional ...
V I, Polezhaev +2 more
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Critical threshold in pipe flow transition
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008This study provides a numerical characterization of the basin of attraction of the laminar Hagen–Poiseuille flow by measuring the minimal amplitude of a perturbation required to trigger transition. For pressure-driven pipe flow, the analysis presented here covers autonomous and impulsive scenarios where either the flow is perturbed with an
Mellibovsky, Fernando, Meseguer, Alvaro
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Maximum Flows and Critical Vertices in AND/OR Graphs
2002We will study this problem and present an algorithm for finding the minimum-time-cost solution graph in an AND/OR graph. We will also study the following problems which often appear in industry when using AND/OR graphs to model manufacturing processes or to model problem solving processes: finding maximum (additive and nonadditive) flows and critical ...
Yvo Desmedt, Yongge Wang 0001
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A mixed criticality approach for the security of critical flows in a network-on-chip
ACM SIGBED Review, 2016In this paper, we explore a new approach for the security of flow transmission in a Network-on-Chip. This approach is based on a dual mixed criticality approach where the criticality of a flow (HI or LO) is associated to timeliness and security constraints on flow transmission. Flow of HI criticality should be protected from Denial of Service (DoS) and
Ermis Papastefanakis +2 more
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