Maximum scour hole in Flow

samkelet · September 13, 2017, 10:09

I know this topic has been deliberated several times, but I cant seem to find a real solution. What are the most sensitive or critical parameters in attaining maximum scour hole in Flow-3D? I have tried several times to simulate scour (changing shield parameters, drag coefficient, boundary conditions etc, but I cant seem to get it right. I have a prepin file, any one with help, I can forward my simulationAny advise would be appreciated. I would be trying to use OpenFoam but I think time is against me to learn it now. If there are any alternatives to Flow-3D, kindly inbox me suggestions.
Thank you

D.Abedi · March 28, 2018, 08:49

hi samkelet

I'd been working on a scouring problem during the past year.
I'ad find that must important parameter in scouring problem is Maximum Turbulence Mixing Length in turbulence options beside the sediment parameters, meshing, BCs, etc.

on default setting it's computed dynamically but as the documentation of flow-3d it's better to be imported by user as a constant number.
read the flow-3d documentation for finding best amount for this patameter in your problem.

Finally you must be aware that flow-3d uses empirical relationships to calculate scouring which computational error seems to be acceptable to about 20%.

samkelet · March 28, 2018, 10:49

Thanks a lot brother, I will look into that and give you feedback. I have been using the dynamical means all along

Rashidmeo · December 30, 2019, 14:12

Hello samkelet,

I am new and trying to model bridge pier scouring around octagonal pier shape but facing a lot of difficulty. It would be a great favor if you share a tutorial or any other file which can explain that how to draw pier geometry, meshing and other setting of important parameters for it, please.

Nisar ul haq · January 3, 2020, 05:44

Quote:

Originally Posted by Rashidmeo

Hello samkelet,

I am new and trying to model bridge pier scouring around octagonal pier shape but facing a lot of difficulty. It would be a great favor if you share a tutorial or any other file which can explain that how to draw pier geometry, meshing and other setting of important parameters for it, please.

have you solve your problem

Rashidmeo · January 3, 2020, 05:50

Hello Nisar ul haq,

Not yet I still need assistance in Flow 3D.

Nisar ul haq · January 5, 2020, 02:29

Quote:

Originally Posted by Rashidmeo

Hello Nisar ul haq,

Not yet I still need assistance in Flow 3D.

Dear if you got any tutorial or any other helping material please share it with me . i am also doing research on bridge pier scouring
Thanks in advance

September 13, 2017, 10:09	Maximum scour hole in Flow	#1
samkelet New Member Join Date: Mar 2017 Posts: 9 Rep Power: 9	I know this topic has been deliberated several times, but I cant seem to find a real solution. What are the most sensitive or critical parameters in attaining maximum scour hole in Flow-3D? I have tried several times to simulate scour (changing shield parameters, drag coefficient, boundary conditions etc, but I cant seem to get it right. I have a prepin file, any one with help, I can forward my simulationAny advise would be appreciated. I would be trying to use OpenFoam but I think time is against me to learn it now. If there are any alternatives to Flow-3D, kindly inbox me suggestions. Thank you gaoyaping likes this.

December 30, 2019, 14:12	Flow 3D assistance	#4
Rashidmeo New Member Rashid Meo Join Date: Dec 2019 Posts: 5 Rep Power: 7	Hello samkelet, I am new and trying to model bridge pier scouring around octagonal pier shape but facing a lot of difficulty. It would be a great favor if you share a tutorial or any other file which can explain that how to draw pier geometry, meshing and other setting of important parameters for it, please.

January 3, 2020, 05:50		#6
Rashidmeo New Member Rashid Meo Join Date: Dec 2019 Posts: 5 Rep Power: 7	Hello Nisar ul haq, Not yet I still need assistance in Flow 3D. Last edited by Rashidmeo; January 3, 2020 at 05:51. Reason: grammatical mistake

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March 28, 2018, 08:49		#2
D.Abedi New Member Davood Abedi Join Date: Nov 2017 Posts: 5 Rep Power: 9	hi samkelet I'd been working on a scouring problem during the past year. I'ad find that must important parameter in scouring problem is Maximum Turbulence Mixing Length in turbulence options beside the sediment parameters, meshing, BCs, etc. on default setting it's computed dynamically but as the documentation of flow-3d it's better to be imported by user as a constant number. read the flow-3d documentation for finding best amount for this patameter in your problem. Finally you must be aware that flow-3d uses empirical relationships to calculate scouring which computational error seems to be acceptable to about 20%.

March 28, 2018, 10:49		#3
samkelet New Member Join Date: Mar 2017 Posts: 9 Rep Power: 9	Thanks a lot brother, I will look into that and give you feedback. I have been using the dynamical means all along