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Hello, 

I have a simple question about a reduce application. My apologies if this
question has been asked before but I am a relatively new user of Reduce.

I am interested in manipulating the Navier-Stokes equations in arbitrary
coordiate systems - I wish to investigate the use of different base vectors in
terms of number of terms and simplicity for later development of a new CFD
(Computational fluid dynamics) program. I would like to represent the velocity
vector in contra/covariant/cartesian forms and mixed versions of these.

We have Reduce3.3 here at Cranfield, though I am relatively inexperienced. I
dont see an easy way of carrying out the above task using Reduce. I have
investigated the EXCALC package but unfortunately I am not familiar with the
terminology that is used. What I thought I needed was a package that could
manipulate vectors and tensors in arbitrary coordinate systems which would then
expand the equations in terms of the indices. There is a vector package in
reduce-netlib but this is limited to orthogonal coordinates.


Any comments or suggestions would be really welcome.

Thanks in advance,



Dr Philip Rubini

School of Mechanical Engineering
Cranfield Institute of Technology
Cranfield
Bedfordshire MK43 0AL
ENGLAND

Tel. +44 (0)234 754649
Fax. +44 (0)234 750728

Email: p.rubini@cranfield.ac.uk