[Dune] publications about Dune parallel scalability and performance

[Oliver Sander]

Hi Ziad,

On 07.01.20 23:53, Ziad Boutanios wrote:
> Thanks. I'm planning to start with a DG Navier-Stokes solver and see where that goes. Two weeks should indeed be enough. BTW does libdune support vectorization and hybrid meshes (e.g. pyramids and tetras)?

yes, it supports hybrid meshes (use the UGGrid grid implementation).

Someone else will have to answer the vectorization question
(but I think the answer is 'yes').

Best,
Oliver

> 
> On 2020-01-07 5:34 p.m., Christoph Grüninger wrote:
>> Hi Ziad,
>> I don't think you will find ready-to-use codes for your problem at hand
>> in the Dune world. But with Dune-FEM (or AcFEM) or Dune-PDELab you
>> should be able to set up your discretization within a couple of weeks.
>> Then you can test the actual performance.
>>
>> Bye
>> Christoph
>>
>> Am 30.12.19 um 16:27 schrieb Ziad Boutanios:
>>> Hi Christoph,
>>>
>>> I have an extensive background in multiphase flows using both FEM and
>>> FVM. My interest in DG for incompressible multiphase simulations stems
>>> from the suitability of the method for hyperbolic problems. It is also
>>> quite good for volume fraction transport equations where the volume
>>> fraction needs to be bounded between 0 and 1.
>>>
>>> I recently wrote a CG/DG code for a Eulerian-Eulerian formulation using
>>> UFL with good results but it is very slow compared to FVM. Such a code
>>> can be used for aero-icing, sediment transport, drifting snow,
>>> particulate flow through porous media, etc. Right now I am looking to
>>> modify the equations and make the code faster, maybe use DG for all
>>> equations if it helps parallel runs.
>>>
>>> My interest in Dune is due to improved mesh handling and availability of
>>> automatic mesh adaptation. This is a research project I'm doing
>>> part-time for lack of funding but I am open to collaborations if someone
>>> has a common interest and could get involved full-time.
>>>
>>> Kind regards,
>>>
>>> Ziad
>>>
>>> On 2019-12-28 2:20 p.m., Christoph Grüninger wrote:
>>>> Hi Ziad,
>>>> my impression is, that there is not must interest in large-scale
>>>> Navier-Stokes calculation within the Dune community. Most applications
>>>> are elliptic or parabolic.
>>>> The only exception is some work by Robert Klöfkorn (et al.?), but that
>>>> was about shock fronts that needed grid refinement along the front. So
>>>> not incompressible. And quite some time ago.
>>>> Some weather simulations were or are done using Dune. I don't know what
>>>> type of equations they solve.
>>>>
>>>> Why are you asking? Do you want to use Dune for this kind of appliation?
>>>> Do you want to compare its performance to other tools? What's your
>>>> background? How much would you be willing to invest?
>>>>
>>>> Bye
>>>> Christoph
>>>>
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> 
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