[aspect-devel] cylindrical rigid body rotation

[Timo Heister]

and we now have the option to remove angular momentum instead of net
rotation, at least in 2d. See attached plot for an example where you can
see that the RMS velocity is increasing without the filtering and that net
rotation and angular momentum give nearly identical results.
It is quite difficult to construct an example where those two methods
differ by a lot.


On Sun, Apr 6, 2014 at 8:09 PM, Timo Heister <heister at clemson.edu> wrote:

> Cedric,
>
> Ian and I just checked in options to remove net rotation and translation.
> There are two new examples in cookbooks/future/net*.prm that show the
> effect (if you turn the nullspace removal off, things start to drift/rotate
> after a while). We are now looking into the angular momentum as an
> alternative.
>
> Please let me know if this works for you.
>
>
>
>
> On Fri, Apr 4, 2014 at 5:51 PM, Thieulot, C. (Cedric) <c.thieulot at uu.nl>wrote:
>
>>  Hi,
>>
>>    I have implemented the no net rotation formula that Ian mentions and
>> it works fine
>>
>>
>> Can you send me the patch for that please?
>>
>>
>>  there is a misunderstanding here. I implemented it in *my* code. See
>> attached document for what I did exactly.
>>
>>  I did not try anything else since I managed to pass all benchmark
>> experiments of Rhodri with this formula.
>> Since my density varies by 0.001% at most, I don't expect its value to
>> play a big role in the calculation of omega, however.
>> I could try the formula containing rho the coming week and document the
>> changes.
>>
>>  C.
>>
>>
>> _______________________________________________
>> Aspect-devel mailing list
>> Aspect-devel at geodynamics.org
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>>
>
>
>
> --
> Timo Heister
> http://www.math.clemson.edu/~heister/
>



-- 
Timo Heister
http://www.math.clemson.edu/~heister/
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