The sediment parameters in flml are MKS system of units ?

Grain diameter is in mm, all others should be in MKS. See the mms_sediment test for some example values.

Hope that helps

Hi Jon

You hit it. I'm confused with the diameter unit in "mms_sediment" .

Thanks your answer.

It's in millimetres

(i.e. 1 == 1x10-3 m)

On 26/04/14 03:56, liu chin chi wrote:
> Question #247553 on Fluidity changed:
> https://answers.launchpad.net/fluidity/+question/247553
>
> Status: Answered => Solved
>
> liu chin chi confirmed that the question is solved:
> Hi Jon
>
> You hit it. I'm confused with the diameter unit in "mms_sediment" .
>
> Thanks your answer.
>

Hi Jon

So the units be used in sediment as below ?

Sediment initial condition kg/m^3
Bedload initial condition m
Diameter mm
Diffusivity mm^2/sec
Viscosity mm^2/sec
Sinking velocity mm/sec
UnhinderedSinking velocity mm/sec

Sediment initial condition % concentration as a fraction of 1 (i.e. we
expect it to be very small in order for the model to be valid < 0.1 (i.e
10%) typically)
Bedload initial condition m
Diameter mm
Diffusivity m^2/sec
Viscosity m^2/sec
Sinking velocity m/sec
UnhinderedSinking velocity m/sec

Hope that helps,

Jon

On 26/04/2014 12:46, liu chin chi wrote:
> Question #247553 on Fluidity changed:
> https://answers.launchpad.net/fluidity/+question/247553
>
> Status: Solved => Open
>
> liu chin chi is still having a problem:
> Hi Jon
>
> So the units be used in sediment as below ?
>
> Sediment initial condition kg/m^3
> Bedload initial condition m
> Diameter mm
> Diffusivity mm^2/sec
> Viscosity mm^2/sec
> Sinking velocity mm/sec
> UnhinderedSinking velocity mm/sec
>

--
Dr Jon Hill
Research Fellow
AMCG, Earth Science and Engineering
Imperial College London
Mob: 07748254812
Phone: +44(0)2075949321
Twitter: @jonxhill

That's really helpful.

Thanks a lot.

Liu

Thanks Jon Hill, that solved my question.

Hi Jon,

One more question, what's the unit of the BedloadDepositRate( BedloadErosionRate)
It seems the same order of suspension load(volume of fraction), but i'am not sure if the unit is 1/sec.

Appreciate for your patience.

Liu

The manual mentions that "ErosionRate" is dimensionless in Garcia’s re-entrainment algorithm.

Sorry for bothering.