[aspect-devel] Velocity Boundary conditions

[Lev Karatun]

Hi Ian,

Since specifying all 3 components of velocity is required if you want to
set it using Function, are you saying it's wrong to have something like
"Prescribed velocity boundary indicators = left: Function"
in the parameter file? There are examples of such usage in the manual.
Could you clarify it please?

Best regards,
Lev Karatun.

2017-06-02 17:55 GMT-04:00 Ian Rose <ian.rose at berkeley.edu>:

> I would also note that if you try to specify three components of the
> velocity, you are very likely to violate your incompressibility constraint
> (or, if compressible, you will have crazy pressures).
>
> Ian
>
> On Fri, Jun 2, 2017 at 2:26 PM, Wolfgang Bangerth <bangerth at tamu.edu>
> wrote:
>
>> On 06/02/2017 03:17 PM, FELIPE ORELLANA ROVIROSA wrote:
>>
>>>
>>>         At a wall boundary, is it possible to prescribe 2 components of
>>> the velocity (for example to 0 in particular for my case), and leave the
>>> 3rd free?
>>>
>>
>> Only if those two are the two tangential components of the velocity.
>>
>> Best
>>  W.
>>
>> --
>> ------------------------------------------------------------------------
>> Wolfgang Bangerth          email:                 bangerth at colostate.edu
>>                            www: http://www.math.colostate.edu/~bangerth/
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>
>
>
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