yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

Hi Jérôme,

Strictly speaking the doc is right: "Energy provided by boundaries" does 
not tell if the boundaries provide energy to the sample or to the outside.

I agree that it is probably more common to define "external work input" 
as an input _to_ the sample, yet overall it remains a matter of taste.

I'm not for discussing/changing such sign conventions unless they are 
obviously wrong. There are probably tons of user scripts which would 
have to be adapted after such change (including mines), not a good 
thing. Instead, I would clarify the documentation without changing the code.

Bruno

On 07/27/2016 07:26 PM, Jerome Duriez wrote:
> Hello,
>
>
> I'm proposing to change the sign convention of 
> TriaxialStressController.externalWork.
>
>
> I would like it corresponds to the "Energy provided by boundaries" as 
> the doc says, however it seems to me it's currently rather the energy 
> provided to the boundaries (by the sample). Since we use the Force 
> acting on the boundaries together with the boundaries velocities.
>
>
> Agree to revert this sign ?
>
>
> Jerome
>
>
>
> --------------------------------------------------
>
> Jerome Duriez, Research Associate
>
> University of Calgary, Dpt of Civil Engineering
>
> +1 403 220 7367
>
>
>
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