High velocity at the surface

Question

Hello,

I am currently running a simulation in a shallow lake (average depth 4m), but there is a possibility that the velocity at the surface is faster (Possibly more than twice as fast).

The unit of height of an anemometer is in meters, correct?

The cause may be that the increase in momentum due to wind is too large.
Is there any way to reduce the momentum increase due to the wind?

I would like to know how to deal with this problem other than changing 'wind_cd'.

Also, I am not sure if this has anything to do with this, but I would like to know what "imomentumcorrection" is.

Thank you for your help.

Rina Oe

Answer 1

Hi Rina,

Units are metres.

What vertical grid size are you using?  Is it just the surface layer that is too high?  How confident are you that the wind data is representative of the conditions on the lake?

imomentumcorrection was an experimental solution that is no longer in the code

Comments

Thank you for your reply .

The size of the vertical grid is 0.2m.
The size of the horizontal grid is 100m × 100m.

It is possible that the velocity is fast not only in the surface layer but also in the middle and lower layers.

Regarding the representativeness of the observed winds, I believe that the winds are similar to the observed winds in more than 60% of the lake.(The lake area is 13.3 km²)

Thank you for your help.

Rina Oe