MeasureTool - unexpected water height drop
Dear all,
in simulation of L-shape dam break, we encountered a problem with MeasureTool when measuring water height at probe locations.
For point measurement small discretization was chosen with greater number of points:
POINTSLIST
5.615 2.66 0.0
0.0 0.0003
1 1 1000
and particle dp in simulation was 0.008 m.
For measureTool parameters are:
-points data_points.txt -onlytype:-all,+fluid -height:0.5 -heightoutput:all -savecsv
where these parameters produce results that have unexpected drop in water height at some probe locations as can be seen in the picture (red is experiment and green is SPH).
Time discretization is 0.17 seconds, where it can be seen that only few time steps have that problem, compared to total number of measurements.
We managed to "solve" this problem when height parameter is reduced to 0.4, but that is not a solution we prefer because that also influences results at other probes.
Do you have any recommendation regarding this problem?
Thank you and best regards,
Ivana
in simulation of L-shape dam break, we encountered a problem with MeasureTool when measuring water height at probe locations.
For point measurement small discretization was chosen with greater number of points:
POINTSLIST
5.615 2.66 0.0
0.0 0.0003
1 1 1000
and particle dp in simulation was 0.008 m.
For measureTool parameters are:
-points data_points.txt -onlytype:-all,+fluid -height:0.5 -heightoutput:all -savecsv
where these parameters produce results that have unexpected drop in water height at some probe locations as can be seen in the picture (red is experiment and green is SPH).
Time discretization is 0.17 seconds, where it can be seen that only few time steps have that problem, compared to total number of measurements.
We managed to "solve" this problem when height parameter is reduced to 0.4, but that is not a solution we prefer because that also influences results at other probes.
Do you have any recommendation regarding this problem?
Thank you and best regards,
Ivana
Comments
In 2D you should use -height:0.4
I would say that you have to tune VISCO of Artificial viscosity to analyse how that affects the results. In the case of dam-breaks the value of artificial viscosity varies with resolution.
Please can you compare results with 0.2, 0.1, 0,05 and 0,01???
Regards