fluidsim.solvers.ns3d.output.spect_energy_budget
SEB (fluidsim.solvers.ns3d.strat.output.spect_energy_budget
)
- class fluidsim.solvers.ns3d.output.spect_energy_budget.SpectralEnergyBudgetNS3D(output)[source]
Bases:
SpecificOutput
Spectral energy budget of ns3d.strat.
Notes
\[d_t E_K(\textbf{k}) = T_K(\textbf{k}) - D_K(\textbf{k}),\]where \(E_K(\textbf{k}) = |\hat{\textbf{v}}|^2/2\).
The transfer term is
\[T_K(\textbf{k}) = \Re \left(\hat{\textbf{v}}^* \cdot P_\perp\widehat{\textbf{v} \times \boldsymbol{\omega}} \right).\]By definition, we have to have \(\sum T_K(\textbf{k}) = 0\).
The dissipative term is
\[D_K(\textbf{k}) = f_{dK}(\textbf{k}) E_K(\textbf{k}),\]where \(f_{dK}(\textbf{k})\) is the dissipation frequency depending of the wavenumber and the viscous coefficients.
Classes
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Spectral energy budget of ns3d.strat. |