[CIG-SHORT] Issue with Normal Orientation

[Romain Jolivet]

Wonderful. Let me know when you will have time to update the git repository (no rush, I will stick to 4 processes until then).
R

Romain Jolivet
Cambridge, UK
jolivetinsar at gmail.com
UK: +44 7596 703 148
France: +33 6 52 91 76 39
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On 18 Feb 2015, at 18:05, Brad Aagaard <baagaard at usgs.gov> wrote:

> On 02/18/2015 07:37 AM, Romain Jolivet wrote:
>> 
>> On 18 Feb 2015, at 15:30, Matthew Knepley <knepley at mcs.anl.gov> wrote:
>> 
>>> On Wed, Feb 18, 2015 at 9:21 AM, Romain Jolivet <jolivetinsar at gmail.com> wrote:
>>> Hello,
>>> 
>>> I am having some more problems with the orientation of the vectors normal to the fault.
>>> 
>>> My problem is in 2D, with a fault slicing the entire medium (see tar ball attached).
>>> The fault is FaultCohesiveKin class. I enforce the slip.
>>> 
>>> When I run with 1, 2, 3, 5, 7 or 9 nodes, I have one orientation for the vectors normal to the fault.
>>> When I run with 4, 6 or 8 nodes, I have the opposite orientation.
>>> I haven’t tried with more nodes.
>>> 
>>> That should not happen, right?
>>> 
>>> This can happen. We have to choose some orientation for the fault, and different partitions
>>> produce different starting points, and thus the fault can have the opposite normal.
>>> 
>>>   Thanks,
>>> 
>>>      Matt
>> 
>> Hmmm, that is not very convenient…
>> Isn’t it possible to add a constraint on the normal vector for that starting point?
>> 
>> Something like:
>> If it points down, take the opposite,
>> If it is horizontal and points to the right, make it point to the left.
> 
> Romain,
> 
> I know I originally setup the fault slip orientation information so that it didn't matter which direction the normal pointed in a 2-D simulation. Positive tangential slip was left lateral and negative tangential slip was right lateral. I can see from your example that this is not happening now. I will fix this.
> 
> Brad
> 
> 
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