Simulate with complex geometries and complex physics
COMP_nbSmooth_Eta
number of smoothing cycles for effective, total viscosity and smoothed density (UCV)
Default: COMP_nbSmooth_Eta = 2
This parameter specifies the number of smoothing cycles for %ind_ETA_sm% and %ind_ETA_eff% and %ind_r_sm%.
If \( \hat{\eta}_i^{k}\) is the smoothed version, i.e. the total viscosity or the density after the k-th smoothing cycle at MESHFREE point with index i, then the new value at cycle (k+1) is given by
\begin{align} \hat{\eta}_i^{k+1} = \frac{ \sum\limits_{j=1}^N W_{ij} \cdot \hat{\eta}_j^{k} }{ \sum\limits_{j=1}^N W_{ij} }\end{align}
i.e. a Shepard-based smoothing is employed.
Note: The weight kernel \( W_{ij}\) is defined by COMP_facSmooth_Eta. The same weighted kernel is used also for smoothing density.
| This item is referenced in: | |
|---|---|
| %ind_ETA_sm% | total viscosity, consisting of physical, turbulent, and additional numerical viscosities; unit: Pa*s |
| COMP_nbSmooth_Eta | number of smoothing cycles for effective, total viscosity and density (CV) |
| COMP_nbSmooth_Eta | number of smoothing cycles for effective and total viscosity (UCVO) |
| COMP_facSmooth_Eta | parameter for weight kernel definition for smoothing of viscosity and density(UCV) |
| COMP_nbSmooth_Eta | number of smoothing cycles for effective, total viscosity and smoothed density (UCV) |