Keywords derived from diffusion_deriv

diffusion_deriv

not_set

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diffusion_negligeable

Synonyms: negligeable

Inherits from: diffusion_deriv

the diffusivity will not taken in count

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diffusion_option

Synonyms: option

Inherits from: diffusion_deriv

not_set

Parameters:

• bloc_lecture (type: bloc_lecture) not_set

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diffusion_p1ncp1b

Synonyms: p1ncp1b

Inherits from: diffusion_deriv

not_set

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diffusion_stab

Synonyms: stab

Inherits from: diffusion_deriv

keyword allowing consistent and stable calculations even in case of obtuse angle meshes.

Parameters:

• [standard] (type: int) to recover the same results as calculations made by standard laminar diffusion operator. However, no stabilization technique is used and calculations may be unstable when working with obtuse angle meshes (by default 0)
• [info] (type: int) developer option to get the stabilizing ratio (by default 0)
• [new_jacobian] (type: int) when implicit time schemes are used, this option defines a new jacobian that may be more suitable to get stationary solutions (by default 0)
• [nu] (type: int) (respectively nut 1) takes the molecular viscosity (resp. eddy viscosity) into account in the velocity gradient part of the diffusion expression (by default nu=1 and nut=1)
• [nut] (type: int) not_set
• [nu_transp] (type: int) (respectively nut_transp 1) takes the molecular viscosity (resp. eddy viscosity) into account in the transposed velocity gradient part of the diffusion expression (by default nu_transp=0 and nut_transp=1)
• [nut_transp] (type: int) not_set

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diffusion_standard

Synonyms: standard

Inherits from: diffusion_deriv

A new keyword, intended for LES calculations, has been developed to optimise and parameterise each term of the diffusion operator. Remark:

1. This class requires to define a filtering operator : see solveur_bar
2. The former (original) version: diffusion { } -which omitted some of the term of the diffusion operator- can be recovered by using the following parameters in the new class :

diffusion { standard grad_Ubar 0 nu 1 nut 1 nu_transp 0 nut_transp 1 filtrer_resu 0}.

Parameters:

• [mot1] (type: string into ['defaut_bar']) equivalent to grad_Ubar 1 nu 1 nut 1 nu_transp 1 nut_transp 1 filtrer_resu 1
• [bloc_diffusion_standard] (type: bloc_diffusion_standard) not_set

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diffusion_turbulente_multiphase

Synonyms: turbulente

Inherits from: diffusion_deriv

Turbulent diffusion operator for multiphase problem

Parameters:

• [type] (type: type_diffusion_turbulente_multiphase_deriv) Turbulence model for multiphase problem

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difusion_p1b

Synonyms: p1b

Inherits from: diffusion_deriv

not_set