ViscoelasticFluid

class osaft.core.fluids.ViscoelasticFluid(frequency, rho, c, eta_f, eta_p, zeta_f, zeta_p, lambda_M)[source]

Bases: ViscousFluid

Class for a viscoelastic fluid

Parameters:

frequency (Union[int, float, Frequency]) – frequency in [Hz]
rho (float) – density in [km/m^3]
c (float) – speed of sound [m/s]
eta_f (float) – shear viscosity of fluid component [Pa s]
zeta_f (float) – bulk viscosity of fluid component [Pa s]
eta_p (float) – shear viscosity of polymer component [Pa s]
zeta_p (float) – bulk viscosity of polymer component [Pa s]
lambda_M (float) – relaxation time of fluid [s]

Public Data Attributes:

`eta_p`	Polymer component shear viscosity \(\eta_p\) [Pa s]
`zeta_p`	Polymer component bulk viscosity \(\zeta_p\) [Pa s]
`lambda_M`	Relaxation time of the fluid \(\lambda_M\) [s]
`eta_c`	Complex acoustic shear viscosity of the fluid \(\eta_c\) [Pa s]
`zeta_c`	Complex acoustic bulk viscosity of the fluid \(\zeta_c\) [Pa s]
`k_f`	Returns the wave number in the fluid \(k_f\) [1/m]
`k_v`	Returns the viscous wave number in the fluid \(k_v\) [1/m]

Inherited from ViscousFluid

`eta_f`	Shear viscosity of the fluid \(\eta_f\) [Pa s].
`zeta_f`	Bulk viscosity of the fluid \(\zeta_f\) [Pa s].
`k_f`	Returns the wave number in the fluid \(k_f\) [1/m]
`k_v`	Returns the viscous wave number in the fluid \(k_v\) [1/m]
`delta`	Returns the boundary layer thickness \(\delta\) [m]
`lambda_v`	Returns the viscous wave length \(\lambda_v\) [m]

Inherited from InviscidFluid

`c_f`	Speed of sound in the fluid \(c_f\) [ms].
`rho_f`	Density of the fluid \(\rho_f\) [kg/m^3].
`kappa_f`	Returns the compressibility of the fluid \(\kappa_f\) [1/Pa]
`k_f`	Returns the wave number \(k_f\) [rad s^-1]
`lambda_f`	Returns the wavelength \(\lambda_f\) [m]

Inherited from BaseFrequencyComposite

`f`	wrapper for `osaft.core.frequency.Frequency.f`
`omega`	wrapper for `osaft.core.frequency.Frequency.omega`

Public Methods:

Inherited from BaseFrequencyComposite

input_variables()

Returns all properties that are settable.

classmethod input_variables()

Returns all properties that are settable.

Returns a list of the names of all properties that are settable, i.e. all properties that wrap a PassiveVariable.

Return type:: list[str]

property c_f: float

Speed of sound in the fluid \(c_f\) [ms].

Getter:: returns the value for the frequency
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()

property delta: float: Returns the boundary layer thickness \(\delta\) [m]

property eta_c: complex: Complex acoustic shear viscosity of the fluid \(\eta_c\) [Pa s]

property eta_f: float

Shear viscosity of the fluid \(\eta_f\) [Pa s].

Getter:: returns the shear viscosity
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()

property eta_p: float

Polymer component shear viscosity \(\eta_p\) [Pa s]

Getter:: Returns the polymer component shear viscosity
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()

property f: float: wrapper for osaft.core.frequency.Frequency.f

property k_f: complex: Returns the wave number in the fluid \(k_f\) [1/m]

property k_v: complex: Returns the viscous wave number in the fluid \(k_v\) [1/m]

property kappa_f: float: Returns the compressibility of the fluid \(\kappa_f\) [1/Pa]

property lambda_M: float

Relaxation time of the fluid \(\lambda_M\) [s]

Getter:: Returns the relaxation time of the fluid
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()

property lambda_f: float: Returns the wavelength \(\lambda_f\) [m]

property lambda_v: float: Returns the viscous wave length \(\lambda_v\) [m]

property omega: float: wrapper for osaft.core.frequency.Frequency.omega

property rho_f: float

Density of the fluid \(\rho_f\) [kg/m^3].

Getter:: returns the value for the density
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()

property zeta_c: complex: Complex acoustic bulk viscosity of the fluid \(\zeta_c\) [Pa s]

property zeta_f: float

Bulk viscosity of the fluid \(\zeta_f\) [Pa s].

Getter:: returns the bulk viscosity
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()

property zeta_p: float

Polymer component bulk viscosity \(\zeta_p\) [Pa s]

Getter:: Returns the polymer component bulk viscosity
Setter:: automatically invokes osaft.core.variable.BaseVariable.notify()