atl_spectral_visc_type Derived Type

type, public :: atl_spectral_visc_type

Datatype representing the spectral viscosity stabilization.

The spectral viscosity stabilzation applies a damping of the modal coefficients (in spectral space). The filter applies an expontential damping:

If the modal expansion is given by: $u(x) = \sum_{k=0}^N u_k L_k(x)$

The spectral viscosity applies the following damping: $u(x) = \sum_{k=0}^N \sigma_k u_k L_k(x)$

The damping coefficient $\sigma_k$ is given by: $\sigma_k = exp( -\alpha (|k|_{L2}/|cut_order|_{L2})^{order} )$

Contents

Variables

alpha order cut_order kind isAdaptive recovery_order recovery_density recovery_pressure recovery_mach

Components

Type	Visibility	Attributes		Name		Initial
real(kind=rk),	private		::	alpha	=	0.0_rk
real(kind=rk),	private		::	order	=	0.0_rk
real(kind=rk),	private		::	cut_order	=	-1.0_rk
integer,	private		::	kind	=	atl_exp_spectral_visc_prp
logical,	private		::	isAdaptive	=	.false.
real(kind=rk),	private		::	recovery_order	=	1.0_rk
real(kind=rk),	private		::	recovery_density	=	1e-2_rk
real(kind=rk),	private		::	recovery_pressure	=	1e-2_rk
real(kind=rk),	private		::	recovery_mach	=	2.5_rk