View Issue Details
ID | Project | Category | View Status | Date Submitted | Last Update |
---|---|---|---|---|---|
0003121 | OpenFOAM | Feature | public | 2018-12-04 18:31 | 2018-12-04 18:55 |
Reporter | saideep | Assigned To | henry | ||
Priority | normal | Severity | feature | Reproducibility | N/A |
Status | closed | Resolution | no change required | ||
Summary | 0003121: Complex interface curvature equation in "interfaceProperties.C" | ||||
Description | I reported this observation few months ago but unable to find it here now. So, I will keep it short and to the point. Solver: "interFoam" I have a paddle (see attached figure) and I am using 0 contact angle. So, wetting phase must slide over wall surface. Using common curvature equation below does not do the job. // Simple expression for curvature K_ = -fvc::div(nHatf_); So, when I reported here earlier, Henry suggested to change the mesh (I tried several other meshes - cfMesh, Fluent but sHM was the best) or use a different equation to compute the curvature. After trying so long, the solution was pretty simple, I used the "complex expression for computing the interface curvature" see below (that has been commented out in all versions of OF): //Complex curvature equation volVectorField nHat(gradAlpha/(mag(gradAlpha) + deltaN_)); K_ = -fvc::div(nHatf_) + (nHat & fvc::grad(nHatfv) & nHat); I could not find any literature regarding the correction term. Could you explain how does this correction term work (any link/ paper)? From my understanding the correction term could probably be proved mathematically it is 0. However, in reality it is not due to the lower order schemes being used on unstructured meshes. | ||||
Tags | No tags attached. | ||||
Date Modified | Username | Field | Change |
---|---|---|---|
2018-12-04 18:31 | saideep | New Issue | |
2018-12-04 18:31 | saideep | File Added: Paddle.png | |
2018-12-04 18:55 | henry | Assigned To | => henry |
2018-12-04 18:55 | henry | Status | new => closed |
2018-12-04 18:55 | henry | Resolution | open => no change required |
2018-12-04 18:55 | henry | Note Added: 0010203 |