dolfin team mailing list archive

["Johan Hoffman" <jhoffman@xxxxxxxxxx>]

> On Sun, 2006-04-09 at 19:48 -0500, Steven Frankel wrote:
>> Hi.  I am new to fenics.  I just downloaded and installed it in the
>> last
>> few days.  I am having a problem compiling the Poisson test case for
>> dolfin (error
>> message below).  Something related to the c++ compiler perhaps?
>
> This is a gcc 3.3 issue with anonymous classes. The DOLFIN demos have
> been modified to avoid this error, see
> http://www.fenics.org/pipermail/dolfin-dev/2006-March/002215.html. If
> you grab DOLFIN 0.6.1, it should work.
>
>> Also, can you point me to a good reference for the navier-stokes
>> solver in dolfin and also some details on the LES capabilities - the
>> manual did not have any information on this.  Thanks.
>>
>
> Johan Hoffman is the person to help you out here.

The Navier-Stokes solver is the cG(1)cG(1) method (piecewise linear finite
elements in space and time) described for example in:
http://www.csc.kth.se/~jhoffman/archive/papers/sp.pdf

In this reference you can also find information about the relation to LES.

It will be material in the manual about this as soon as I find the time.

Basically, the solver should work fine for Re>10, including the case of
turbulent flow.

/Johan





>
> Garth
>
>>
>> poisson $ make
>> `dolfin-config --compiler` `dolfin-config --cflags` -c main.cpp
>> main.cpp: In function `int main()':
>> main.cpp:28: error: syntax error before `:' token
>> main.cpp: At global scope:
>> main.cpp:34: error: ISO C++ forbids declaration of `f' with no type
>> main.cpp:37: error: syntax error before `:' token
>> main.cpp:44: error: ISO C++ forbids declaration of `bc' with no type
>> main.cpp:49: error: no matching function for call to `
>>    dolfin::Poisson::LinearForm::LinearForm(int&)'
>> Poisson.h:250: error: candidates are:
>>    dolfin::Poisson::LinearForm::LinearForm(const
>> dolfin::Poisson::LinearForm&)
>> Poisson.h:441: error:
>>    dolfin::Poisson::LinearForm::LinearForm(dolfin::Function&)
>> main.cpp:50: error: invalid conversion from `int' to
>> `dolfin::PDE::Type'
>> main.cpp:50: error:   initializing argument 4 of `
>>    dolfin::PDE::PDE(dolfin::BilinearForm&, dolfin::LinearForm&,
>> dolfin::Mesh&,
>>    dolfin::PDE::Type)'
>> main.cpp:57: error: syntax error before `<<' token
>> make: *** [main.o] Error 1
>>
>>
>> --
>> Steven H. Frankel
>> Professor, School of Mechanical Engineering
>> Purdue University
>> http://ristretto.ecn.purdue.edu
>
>
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