Self-consistent solutions for allowed interconnect current density. II. Application to design guidelines

1997 ◽  
Vol 44 (2) ◽  
pp. 310-316 ◽  
Author(s):  
W.R. Hunter
Keyword(s):  
Current Density ◽  
Design Guidelines ◽  
Self Consistent

scholarly journals Towards the Use of Novel Materials in Shipbuilding: Assessing Thermal Performances of Fire-Doors by Self-Consistent Numerical Modelling

2020 ◽  
Vol 10 (17) ◽  
pp. 5736
Author(s):  
Giada Kyaw Oo D’Amore ◽  
Francesco Mauro ◽  
Alberto Marinò ◽  
Marco Caniato ◽  
Jan Kašpar
Keyword(s):  
Fire Test ◽  
Critical Factor ◽  
Fem Analysis ◽  
Design Guidelines ◽  
Critical Parameters ◽  
Self Consistent ◽  
New Material ◽  
Innovative Materials ◽  
Rock Wool ◽  
Fire Door

Nowadays, fire-doors optimization is approached by using consolidated design guidelines and traditional materials, such as rock wool. Then, selected solution is directly tested in a mandatory fire-test. Unfortunately, few pieces of information could be retrieved either if the test succeeds or fails, which makes both improvements in the design and use of innovative materials difficult. Thus, in this work, a self-consistent finite element method (FEM) analysis is developed and assessed against experimental fire-test results, highlighting the critical parameters affecting the numerical simulations. Using this tool, a new fiberglass-containing foam, with improved acoustic and mechanical properties, as compared to the rock-wool, is studied as a potential insulating material for on-board fire-doors. The assessment of the performance of the new material demonstrates that, contrary to common believe, the effective thermal insulation capacity is not necessarily the critical factor in determining the fire-resistance of a fire-door. Using the validated FEM analysis, it has been proven that the reduction of the thermal bridges originated at the door edges allows, firstly, for the attainment of a fire-door 37% thinner and 61% lighter with respect to a traditional one, and, secondly, the use of new material as insulator in fire-doors that, even if less thermally capable, could improve other properties of the door, as an example its soundproofing.

scholarly journals Numerical Estimation of Limiting Current Density by Focusing on Mass Transfer within Porous Spacers in an Electro-Dialysis

Membranes ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 75 ◽  
Author(s):  
Yoshihiko Sano ◽  
Kosuke Fukagawa ◽  
Fujio Kuwahara
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Current Density ◽  
Three Dimensional ◽  
Design Guidelines ◽  
Limiting Current ◽  
Safe Operation ◽  
Limiting Current Density ◽  
Flow Disturbances ◽  
Flow Stagnation

Estimating and increasing limiting current density (LCD) levels is of fundamental importance for the development of electrodialysis (ED) systems, and it is becoming clear that the use of porous spacers can significantly increase such LCD levels. In this study, a three-dimensional numerical simulation was proposed for evaluating the mass transfer within a porous spacer unit cell and for estimating LCD levels. It was found that our proposed method is effective for estimating the minimum value of an LCD, which is a significant factor related to the safe operation of ED systems. Furthermore, it was found that increasing the minimum effective Sherwood number provides a key to increasing LCD levels. Porous spacer design guidelines were proposed based on the numerical simulation results, after which a new spacer was introduced, designed according to those guidelines. It was found that flow disturbances on the membrane caused by porous spacer structures can lead to increases in effective Sherwood numbers and that LCD levels could be increased by eliminating the flow stagnation behind the structures on the membrane. The LCD of our new spacer was found to be higher than that of the spacers with the highest LCD levels in use at present. Therefore, we can conclude that the proposed design guidelines are effective for increasing LCD levels.

A novel self-consistent simulator for current-density–voltage characteristics of semiconductor field emitters

1998 ◽  
Vol 72 (10) ◽  
pp. 1220-1222 ◽  
Author(s):  
A. DasGupta ◽  
D. Arslan ◽  
A. Sigurdardottir ◽  
H. L. Hartnagel
Keyword(s):  
Current Density ◽  
Field Emitters ◽  
Self Consistent

Self-consistent model of high current density segmented hollow cathode discharges

1997 ◽  
Vol 81 (2) ◽  
pp. 554-568 ◽  
Author(s):  
R. R. Arslanbekov ◽  
R. C. Tobin ◽  
A. A. Kudryavtsev
Keyword(s):  
Current Density ◽  
Hollow Cathode ◽  
High Current Density ◽  
High Current ◽  
Consistent Model ◽  
Self Consistent

The evolution of the Kuiper belt during the formation of the outer planets

1999 ◽  
Vol 173 ◽  
pp. 37-44
Author(s):  
M.D. Melita ◽  
A. Brunini
Keyword(s):  
Kuiper Belt ◽  
Outer Planets ◽  
Self Consistent ◽  
Planetary Bodies ◽  
Mass Depletion

AbstractA self-consistent study of the formation of planetary bodies beyond the orbit of Saturn and the evolution of Kuiper disks is carried out by means of an N-body code where accretion and gravitational encounters are considered. This investigation is focused on the aggregation of massive bodies in the outer planetary region and on the consequences of such process in the corresponding cometary belt. We study the link between the bombardment of massive bodies and mass depletion and eccentricity excitation.

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