[ajayjatoliya]

Hello REEF 3D team,
I am trying to simulate the problem scour due to current, which is done in the paper "Three-dimensional Computational Fluid Dynamics modeling of scour
around a single pile due to the combined action of the waves and current using
Level-Set method". In that paper, the modeled time is 72000 sec. i also provide the same, but in my simulations, the scour depth (15.3 mm) is achieved too early. i am providing sediment = 0.30 m . in the sediment log file, the bedmin = 0.05 after a certain time. Does it mean my scour is (0.30-0.05 = 25)? if it is true, then I am getting scour depth too early.
Please look into this matter and suggest where I have to change the control and ctrl files.
I attached my sediment log file screenshot, last two columns in the screenshot are bedmin and bedmax. Please have a look on that
Thanks

[ajayjatoliya]

Sir please you once look into the matter

[ajayjatoliya]

Hello REEF 3D Teams

I attached the ctrl and control file in which I am trying to solve scour around a pier, but the shape is not forming below the pier as Well the whole bed is deforming also, and the flow surface is not correct. Sir, if possible, could you please look into this once?

[Ronja]

Hi,
I get a bit confused now which case corresponding to the paper you mentioned you are trying to model. I cannot find that your simulation setup matches with one of the steady current cases.


However, my suggestions:
- be aware of your water depth: F 60 0.2 (initial still water depth) and S 57 0.12 (initial sediment bed) result in a water depth of only 0.08 m. Take care of your discharge/flow velocities also.
- extend your domain
- use a relaxation zone in the beginning (S 73)
- try T 10 2
- Bedload Formula: Engelund&Fredsøe
- be aware of the critical shields value

- restrict the max sediment time step when you are using it adaptable, e.g. S 13 0.1
- try a longer time before the sediment algorithm starts (S 43)-> check your flow state before the sediment agorithm starts
- be aware of decoupled hydrodynamic timestep and morphodynamic timestep (see S 14). Use S 19 for the the stopping criterion of the sediment simuation time


Hope that helps.

[ajayjatoliya]

Hii Ronja, thanks for the reply

(https://doi.org/10.1080/19942060.2018.1438924 ) In this paper, I am trying to replicate the problem(2.2.1.1 (Baykal et al. (2015))). I am keeping the parameter the same as in the paper.

Also, I am facing a problem with the inflow boundary. Here the turbulence is more, which I want to reduce.

In this paper, they use the k-omega SST turbulence model, that's why I used T 10 22


Thanks

[ajayjatoliya]

I am also unable to understand how to implement S 73. Could you once please explain what does all the parameter stands for in S 73?