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Material flow estimation in CELSS
Acta Astronautica, 1992Through the tentative lunar base construction study aiming to explore the system design method regarding closed loop life support system, the feasible system configuration including many subsystems is defined. Based upon this configuration and the estimated metabolic data of human and plants, the required material flow quantities between each ...
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Modeling of Material Flow Problems
2017In this article we discuss the description of modern manufacturing or production problems using continuous models. Instead of a detailed description of the production process, a mathematical formulation is used based on transport equations. The challenge is to derive novel and nonstandard approaches that allow to incorporate detailed nonlinear dynamic ...
Göttlich, Simone +2 more
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Journal of Rheology, 1987
Steady, two-dimensional flows of Bingham fluids are analyzed by means of a modified constitutive relation that applies everywhere in the flow field, in both yielded and practically unyielded regions. The conservation equations and the constitutive relation are solved simultaneously by Galerkin finite element and Newton iteration.
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Steady, two-dimensional flows of Bingham fluids are analyzed by means of a modified constitutive relation that applies everywhere in the flow field, in both yielded and practically unyielded regions. The conservation equations and the constitutive relation are solved simultaneously by Galerkin finite element and Newton iteration.
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Pipe Flow of Plastic Materials
Journal of Applied Mechanics, 1980Plastic materials behave as both solids and fluids. When forced to move in a pipe, they flow as a solid plug with a slipping boundary. Depending on the cross-sectional shape of the pipe, the slipping boundary may not coincide with the inner boundary of the pipe. When such is the situation, there exist dead regions in the flow.
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The material flow concept for materials
Nonrenewable Resources, 1996Mineral supply and demand data were used to track the flow of a material from its source through stages of production, processing, and fabrication into the consumption and postconsumption phases. In each stage prior to consumption, the quantity of material lost to the environment or recovered for reuse was determined.
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