Sediment is non-conservative when using 2-D setups
 

Hi,

I tried to validate the sediment model against Mao (1968)’s experiments. The experiments parameters are: the water depth was 0.35 m, the diameter of the pipeline was D=0.1m, the sediment diameter was d50=0.00036m, inflow rate is 0.4m/s (far-fields Shields number is 0.065).

At first, I tried to use a 2-D setup (only 1 layer mesh along the pipeline), there is no sand dune at the downstream side of scour hole. that reflects the sediment may not be conservative.
I also tried a 3-D setup (3 layers mesh along the pipeline), the sand dune appears, thus, I think the nonconservation problem only occurs 2-D setup.

Could you please check this? (attached is my simulation result). Thanks in advance.

Regards
Bingchang

Verifying
 

Hello Bingcz
You could share your "control" and "ctr" input files to check in some of the commands if there is something preventing what you want to get. please. :)

Hi,

Thanks for the reply, attached is the input files, and geo.dat.

Regards,
Bingchang

hi bingcz
I have not been able to run the DiveMESH input file where the geo data is embedded.
It shows me the following message.

DIVEMesh (c) 2008-2020 Hans Bihs

:: Open source meshing

v_210519

Reading control
open geo.dat and count the entries..


after that there is no progress and the program is stopped indefinitely.

Hi Hernest,

Please see the attached files, I appreciate your help.

Regards,
Bingchang