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IDProjectCategoryView StatusLast Update
0003135OpenFOAMBugpublic2018-12-19 11:48
ReportermqnguyenAssigned Towill 
PrioritynormalSeverityminorReproducibilityhave not tried
Status resolvedResolutionfixed 
PlatformUbuntuOSLinuxOS Version18.04
Product Versiondev 
Fixed in Versiondev 
Summary0003135: Wall boundary condition not respected
DescriptionIn tutorial case: $FOAM_TUTORIALS/multiphase/interFoam/laminar/wave:

I tried to change the bottom into wall boundary condition to wall, but the results show non zeros values, instead it show value order of 2e-3.
Steps To ReproduceStep 1: go to laminar wave case:
```cd $FOAM_TUTORIALS/multiphase/interFoam/laminar/wave```
Step2: change in blockMeshDict:

        type wall;
            (0 1 5 4)

Step 3: in: 0/U.orig:
2 implementation have been tested:
        type noSlip;

        type fixedValue;
        value uniform (0 0 0);


In both case, the velocity in bottom patch is not zero.
TagsNo tags attached.



2018-12-18 10:59

updater   ~0010223

How are you seeing the results? Please provide the specific steps you are using to see the results, because it's all too easy to see the values on the cells rather than the values on the patches.


2018-12-18 15:26

reporter   ~0010226

Step to view the result:
Step 1: load data using paraView, so I just lauch:

Step2: deactive internal mesh and active "bottom"

Step3: chose to color with U, either magnitude or X or Y

Side note: I tried to run the same setup with small modifications using OpenFoam-plus and the results seem to respect the boundary imposed: around 10^-30 as velocity magnitude.


2018-12-19 11:48

manager   ~0010232

We can't reproduce the issue with your instructions. That's why your previous report got closed. See

setWaves does overwrite fixedValue conditions. This is necessary due to some boundary conditions requiring a physical initialisation. The DTCHull case fails due to a floating point error in the outlet boundary if the alpha patch field is not set properly. This is very unlikely to be necessary on walls, however, so I have changed setWaves in dev so that it doesn't override values on walls when the boundary condition is of fixed-value type.

I'm assuming that this issue is resolved by the change, but as I couldn't reproduce it in the first place I'm not completely sure. Open another report if the problem persists.

Issue History

Date Modified Username Field Change
2018-12-17 21:08 mqnguyen New Issue
2018-12-18 10:59 wyldckat Note Added: 0010223
2018-12-18 15:26 mqnguyen Note Added: 0010226
2018-12-19 11:48 will Assigned To => will
2018-12-19 11:48 will Status new => resolved
2018-12-19 11:48 will Resolution open => fixed
2018-12-19 11:48 will Fixed in Version => dev
2018-12-19 11:48 will Note Added: 0010232