Scour around a cylindrical monopile
 

Hi everyone,

I am modelling scour around a cylindrical monopile but I am unable to get the scouring at the upstream end of the monopile. I expect horseshoe vortices to form at the bottom of the monopile, transporting the sediment. Downstream I am getting roughly what I am expecting.

I am not sure whether this is due to the meshing not fine enough to capture the scouring at the upstream end of the monopile or if there is something wrong with something within my input files. I have attached my control and ctrl files.

Thanks! :D

Could you upload the result for the scour pattern?

Here a screenshot

Ah ok. It looks like you are not using the sandslide algorithm. That needs to be turned on for scour calculations.

Which sandslide algorithm would you recommend?

I would suggest S 90 2.

Hi, I have added a sandslide algorithm and have increased the number of sandslide iterations to 1000 and it hasn't made a difference.

Would you have any other suggestions?

I suggest you check your mesh if you haven't done so yet. Check the control.txt and put the relevant definitions only. So far I saw that B 101 is called twice and some other parameter definitions might not be needed? Also I see you are reading in a geo.dat (G 10 1)?

Look at our mesh in paraview after generating it to decide if you need to refine the mesh. Check also if the hydrodynamics (especially around the cylinder) are represented as needed, especially before the sediment algorithm starts.
Try a uniform cell size maybe, your domain is not very big.

What kind of things would you recommend me looking at for the hydrodynamics and the sediment algorithm? I have been playing around with it and still have not had any success.