Numerical Analysis Proceedings of the Colloquium on Numerical Analysis Lausanne, October 11-13, 1976 by J. Descloux, J. Marti


Numerical Analysis Proceedings of the Colloquium on Numerical Analysis Lausanne, October 11-13, 1976 by J. Descloux, J. Marti

Nowadays aluminium is essentially produced according to the Hall-H~roult process, in other words, by electrolysis of alumina A1 0 desolved in molten cryolite Na A1F at a 2 3 3 6 temperature of about 950 C. In a reduction plant cells are connected in series. For technical and economical reasons, it is advisable to choose large nominal currents (150 kAle For such intensities, the electromagnetic effects in the cells become important. In particular, these effects bring about movements in the liauid metal, as well as interface variations in level, that are detrimental to efficiencv and energy consumption [l,~ * For an optimal design, it is necessary to predetermine the electromagnetic behaviour of each new typ of cells. It is specially necessary to calculate the repartition of the current density in each point of the cell (electric problem), and the magnetic induction produced in the liquid metal by the currents circulating in the cell itself, in the near cells and in the external conductors (magnetic problem). Electric problem formulation Stationary electric phenomena are described by the equations ~ ...rotE=O (1) ...divJ=O (2) t=f1 (3) The first equation can be replaced by t=-g;tdU (4) where U is the electric potential. J. -M. BLANC 131 ~ -+ We can eliminate E and J between the equations above. In an homogeneous material, we obtain a Laplace's equation (5) 4u=0 On surfaces separating material of different resistivities, ...

About the Author

Other Formats

Book Info


248 pages


J. Descloux, J. Marti
More books by J. Descloux, J. Marti


Birkhauser Verlag AG

Publication date

1st January 1977



A great way to introduce kids to great books, authors & genres. Parents can find age-appropriate books to share with their children.

Judi Davies – Aberdare Girls Sch

I have told all my friends, family & teachers to see for themselves just how great the site is. Without fail, they are hugely impressed.

Alexander Boxall – age 11

I love Lovereading as it provides an honest opinion and showcases a range of fiction. Suited to both parents & kids alike, it’s a must-use.

Georgie Rowe – age 16

Love “Lovereading4kids” as my son gets to hear about & read new books before his mates which keeps him interested in reading=a very happy Mum

Liz Evans

We love Lovereading4kids because they put books in front of us we wouldn’t otherwise have read. They make us more adventurous readers!

Emily Jacques

It’s a community united by a passion for books and promoting the best there is in children’s literature.

Sam Bateman and family

Lovereading is just a convenient way to find new books and hear others opinions on them.

Sarah Murray – age 15

We love Lovereading4kids because it promotes reading choices, new authors and a sense of community for children of all ages!

Rachel Bridgeman

Lovereading 4 schools