|
[Sponsors] |
February 20, 2014, 03:49 |
Sediment layer for scouring problem
|
#1 |
New Member
Sugonghak PC Bang
Join Date: Feb 2014
Posts: 18
Rep Power: 12 |
Hello everyone. I am still new to scouring simulation in Flow-3D. I have a basic question to ask, which is "How to generate sediment layer for scouring simulation?".
I have specified my initial fluid region, especially the Z minimum. Is everything below Zmin sediment? Else how do I "place"/"locate" my sediment? I know my flow depth, and I would like the sediment to be right below the flow depth. But how? Also, an extra small question is that what does "packed sediment concentration" mean? How to actually determine the value? Appreciate if anyone could help. Thanks! |
|
March 1, 2014, 09:02 |
|
#2 |
New Member
mohsen
Join Date: Mar 2014
Posts: 6
Rep Power: 12 |
you must define component and select " packed sediment" in component type,then edit it in subcomponent-limiters
|
|
March 2, 2014, 20:49 |
|
#3 |
New Member
Sugonghak PC Bang
Join Date: Feb 2014
Posts: 18
Rep Power: 12 |
||
March 4, 2014, 18:14 |
|
#4 |
New Member
mohsen
Join Date: Mar 2014
Posts: 6
Rep Power: 12 |
in this version : in "initial" , front the packed sediment, specified density of sediment, and in "limiters" specified location of packed sediment
|
|
March 6, 2014, 07:52 |
|
#5 | |
New Member
Sugonghak PC Bang
Join Date: Feb 2014
Posts: 18
Rep Power: 12 |
Quote:
By the way, one very simple yet "deadly" question. what is the viscosity of water at 20 degree (in SI unit)? I found out it should be 1.0E-06, but why is the default setting in Flow 3D shows 0.001? I am confused. Please help!! Last edited by sycst911; March 6, 2014 at 21:34. Reason: answer has been found |
||
March 6, 2014, 21:37 |
|
#6 |
New Member
Sugonghak PC Bang
Join Date: Feb 2014
Posts: 18
Rep Power: 12 |
sorry. I have found the answer. thanks!
|
|
March 6, 2014, 21:41 |
|
#7 |
New Member
Sugonghak PC Bang
Join Date: Feb 2014
Posts: 18
Rep Power: 12 |
My last problem remaining is that my sediment tends to be washed off too easily within seconds. I am not sure how to manipulate it despite varying all the values of "critical sediment fraction", "cohesive sediment fraction", "packed sediment concentration". Manipulating these values seem doesnt help much.. Is there any other way to make my sediment binds more tightly (higher cohesiveness)? obviously i couldnt change the sediment diameter, density, Shields parameter, etc. Please help me...
*Why is the angle of repose -90? I thought it is supposed to be 30 for sand, normally speaking. |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
High aspect ratio mesh problem for flat plate boundary layer | sam1364 | OpenFOAM | 3 | May 14, 2020 12:11 |
[snappyHexMesh] SnappyHexMesh: Layer on corners | Pj. | OpenFOAM Meshing & Mesh Conversion | 9 | July 17, 2014 05:26 |
[snappyHexMesh] Boundary layer in a pipe | Clementhuon | OpenFOAM Meshing & Mesh Conversion | 6 | March 12, 2012 13:41 |
[snappyHexMesh] Layer addition problem near symmetry planes | bigbang | OpenFOAM Meshing & Mesh Conversion | 6 | December 8, 2011 07:35 |
Flat plate boundary layer problem | student | Main CFD Forum | 3 | May 21, 2007 14:10 |