| Control-Volume Mixed Finite Element Methods |
FEB 97 |
29 pages |
| Authors:
J. E. Jones; Z. Cai; S. F. McCormick; T. F. Russell; INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
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 | A key ingredient in simulation of flow in porous media is accurate determination of the velocities that drive the flow. Large-scale irregularities of the geology (faults, fractures and layers) suggest the use of irregular grids in simulation. This paper presents a control-volume mixed finite element method that provides a simple, systematic, easily implemented procedure for obtaining accurate velocity approximations on irregular block-centered grids. The control- volume formulation of Darcy's law ... |
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| Template Synthesis of Conducting Polymers - Enhanced Conductivity, Enhanced Supermolecular Order, Interesting Microstructures |
07 DEC 90 |
5 pages |
| Authors:
C. R. Martin; Z. Cai; L. S. Van Dyke; W. Liang; COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY
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| Template synthesis entails the synthesis of an electronically conductive polymer within the pores of a microporous membrane. The membranes employed have cylindrical pores of equivalent pre diameter. These pores spatially-confine the synthesis and act as templates for the resulting polymer. Conductive polymer fibrils are obtained, where the fibril diameter is determined by the pore diameter. We have shown that these fibrils can be orders of magnitude more conductive than conventional ... |
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| Nano- and Microstructures in Chemistry, Electrochemistry, and Materials Science |
28 MAR 89 |
7 pages |
| Authors:
C. R. Martin; M. J. Tierney; I. F. Cheng; L. S. Van Dyke; Z. Cai; TEXAS A AND M UNIV COLLEGE STATION DEPT OF CHEMISTRY
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| We have recently become interested in the fabrication and characteri zation of ensembles of nano- and micro-scale structures. In contrast to the majority of the work in this area, our interests do not lie in the microelectronic applications of such structures; rather, we are interested in the possible electrochemical, chemical, optical, and materials applications of nanostructure ensembles. We review these applications and the results of our investigations in this paper. ... |
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| Applications of the Resin Flow/Fiber Deformation Model, |
1986 |
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| Authors:
T. G. Gutowski; S. J. Wineman; Z. Cai
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 | Consolidation experiments taken on special prepregs made of aligned graphite fibers and constant viscosity oils are reported. Three types of experiments were conducted: 1)fiber deformation, 2)axial permeability, and 3)resin pressure. Results show that the fibers can carry a finite load at typical fiber volume fractions for advanced composites. In addition, permeability can be modeled by the Carman-Kozeny Theory. Resin flow/fiber deformation theory was used to model the resin pressure history. ... |
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