Defines variables associated to the statistics of instantaneous fields.

Variables
double precision	left_nusselt_time_averaged = 0d0

double precision	right_nusselt_time_averaged = 0d0

double precision	bottom_nusselt_time_averaged = 0d0

double precision	top_nusselt_time_averaged = 0d0

double precision	back_nusselt_time_averaged = 0d0

double precision	front_nusselt_time_averaged = 0d0

General statistics variables
logical	is_statistics = .false.
	Active statistics computation.

logical	is_statistics_favre_decomposition = .false.
	Active Favre statistics computation.

double precision	statistics_start_time = huge(1d0)
	Start time of computation.

double precision	statistics_integration_time = 0d0
	Integration time.

double precision	statistics_integration_time_n = 0d0
	Previous iteration integration time.

Logicals to activate the computation of each time averaged field
logical	statistics_is_velocity_time_averaged = .false.
	Time averaged velocity computation?

logical	statistics_is_pressure_time_averaged = .false.
	Time averaged pressure computation?

logical	statistics_is_temperature_time_averaged = .false.
	Time averaged temperature computation?

logical	statistics_is_density_time_averaged = .false.
	Time averaged density computation?

logical	statistics_is_species_concentration_time_averaged = .false.
	Time averaged species concentration computation?

logical	statistics_is_tke_dissipation_rate_time_averaged = .false.
	Time averaged turbulent kinetic energy dissipation rate computation.

logical	statistics_is_nusselt_time_averaged = .false.
	Time averaged nusselt number.

logical	statistics_is_micro_mixing_time_time_averaged = .false.
	Time averaged mixing time.

logical	statistics_is_kolmogorov_scale_time_averaged = .false.
	Time averaged Kolmogorov scale computation.

logical	statistics_is_batchelor_scale_time_averaged = .false.
	Time averaged Batchelor scale computation.

Logicals to activate the computation of each field fluctuations
logical	statistics_is_velocity_fluctuation = .false.
	Velocity fluctuation computation?

logical	statistics_is_pressure_fluctuation = .false.
	Pressure fluctuation computation?

logical	statistics_is_temperature_fluctuation = .false.
	Temperature fluctuation temperature computation?

logical	statistics_is_density_fluctuation = .false.
	Density fluctuation temperature computation?

logical	statistics_is_species_concentration_fluctuation = .false.
	Species concentration fluctuation computation?

Logicals to activate the computation of the RMS of each field
logical	statistics_is_velocity_rms = .false.
	Velocity rms computation?

logical	statistics_is_pressure_rms = .false.
	Pressure rms computation?

logical	statistics_is_temperature_rms = .false.
	Temperature rms temperature computation?

logical	statistics_is_density_rms = .false.
	Density rms temperature computation?

logical	statistics_is_species_concentration_rms = .false.
	Species concentration rms computation?


logical	statistics_is_velocity_favre_decomposition = .false.
	Velocity favre decomposition?

logical	statistics_is_temperature_favre_decomposition = .false.
	Temperature favre decomposition?

logical	statistics_is_species_concentration_favre_decomposition = .false.
	Species favre decomposition?

Variables