Question about units

Asked by Emon Mitra

I'm trying to model the uniaxial compression of a powder contained in a facetbox. For the dimensions of the box, the gravity as well as the sphere properties I've been using the centimeter-gram-second system. The force is applied by a plate moving down at a fixed velocity, I was wondering what units the force would be in?

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Hongyang Cheng (alex-cheng) said :
#1

Hi, Yade is using meter-kilogram-second-newton system.
Check the attributes in O.Materials and O. interactions might help.

regards,

alex

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Jérôme Duriez (jduriez) said :
#2

Hello,

From my point of view, Yade summs and multiplies numbers, without considering any unit. It's up to the user to associate a unit to a resulting number, that is consistent with the units associated with input numbers.

In your case, I do not know what is the consistent associated force unit. An alternative way, as Alex said, is to consider that all numbers are in "international system" units.

Jérôme

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Bruno Chareyre (bruno-chareyre) said :
#3

@Alex-Cheng: no, no, no. Yade is not using any unit.

@Emon, google is your friend if you don't like to do the math [1]:
force: F dyne | dyn | g·cm/s2 | 10−5 N

[1] http://en.wikipedia.org/wiki/Centimetre%E2%80%93gram%E2%80%93second_system_of_units

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Hongyang Cheng (alex-cheng) said :
#4

@Bruno Chareyre: Oops. sorry for getting it wrong. In that sense, we can
use quite a variety of unit systems. Thank you for correcting me.

On Fri, Jul 4, 2014 at 12:46 AM, Bruno Chareyre <
<email address hidden>> wrote:

> Question #251125 on Yade changed:
> https://answers.launchpad.net/yade/+question/251125
>
> Bruno Chareyre proposed the following answer:
> @Alex-Cheng: no, no, no. Yade is not using any unit.
>
> @Emon, google is your friend if you don't like to do the math [1]:
> force: F dyne | dyn | g·cm/s2 | 10−5 N
>
> [1]
>
> http://en.wikipedia.org/wiki/Centimetre%E2%80%93gram%E2%80%93second_system_of_units
>
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