OpenFOAM® v1712: New boundary conditions
31/12/2017
New wave modelling: stream function
Integration of functionality produced by The Environmental Hydraulics Institute IHCantabria to model wave inlet conditions based on stream function theory.
The new boundary condition is specified using, e.g.:
inlet
{
alpha alpha.water;
waveModel streamFunction;
nPaddle 1;
waveHeight 0.1517;
waveAngle 0.0;
rampTime 6.034;
activeAbsorption yes;
wavePeriod 3.017;
uMean 2.0825;
waveLength 6.2832;
Bjs
(
8.6669014e-002
2.4849799e-002
7.7446850e-003
2.3355420e-003
6.4497731e-004
1.5205114e-004
2.5433769e-005
-2.2045436e-007
-2.8711504e-006
-1.2287334e-006
);
Ejs
(
5.6009609e-002
3.1638171e-002
1.5375952e-002
7.1743178e-003
3.3737077e-003
1.6324880e-003
8.2331980e-004
4.4403497e-004
2.7580059e-004
2.2810557e-004
);
}
{
alpha alpha.water;
waveModel streamFunction;
nPaddle 1;
waveHeight 0.1517;
waveAngle 0.0;
rampTime 6.034;
activeAbsorption yes;
wavePeriod 3.017;
uMean 2.0825;
waveLength 6.2832;
Bjs
(
8.6669014e-002
2.4849799e-002
7.7446850e-003
2.3355420e-003
6.4497731e-004
1.5205114e-004
2.5433769e-005
-2.2045436e-007
-2.8711504e-006
-1.2287334e-006
);
Ejs
(
5.6009609e-002
3.1638171e-002
1.5375952e-002
7.1743178e-003
3.3737077e-003
1.6324880e-003
8.2331980e-004
4.4403497e-004
2.7580059e-004
2.2810557e-004
);
}
These settings lead to wave profiles such as:
![[Picture]](/releases/openfoam-v1712/img/waves-stream-function.png)
- Source code
- $FOAM_SRC/waveModels/waveGenerationModels/derived/streamFunction
- Examples
- $FOAM_TUTORIALS/multiphase/interFoam/laminar/waveExampleStreamFunction
- Attribution
- This boundary condition was supplied by The Environmental
Hydraulics Institute IHCantabria - see commit 485ac6
Authors: Gabriel Barajas - Integration
- The code has been updated by OpenCFD and added to the $FOAM_SRC/waveModels library available to the interFoam family of solvers - see commit 310756
New blended turbulence viscosity wall function
The new nutUBlendedWallFunction is based on the automatic wall treatment method described in the publication:
Menter, F., Carregal Ferreira, J., Esch, T., Konno, B. (2003). The SST Turbulence Model with Improved Wall Treatment for Heat Transfer Predictions in Gas Turbines. Proceedings of the International Gas Turbine Congress 2003 Tokyo
The turbulence viscosity is derived from the friction velocity, defined as a blend of contributions from the viscous sub-layer and logarithmic regions.
where the coefficient 
is set to 
by default. The wall function is specified
using, e.g.
myWallPatch
{
type nutUBlendedWallFunction;
}
{
type nutUBlendedWallFunction;
}