Reynolds_number {TrenchR}

Reynolds Number

Description

The function estimates the Reynolds Number, which describes the dynamic properties of the fluid surrounding the animal as the ratio of internal viscous forces (Gates 1980).

Usage

Reynolds_number(u, D, nu)

Arguments

u

numeric wind speed (m s^-1).

D

numeric characteristic dimension (e.g., body diameter) (m)

nu

numeric the kinematic viscosity, ratio of dynamic viscosity to density of the fluid (m² s^-1); can calculate from DRYAIR or WETAIR.

Value

numeric Reynolds number.

References

Gates DM (1980). Biophysical Ecology. Springer-Verlag, New York, NY, USA.

See Also

Other biophysical models: Grashof_number_Gates(), Grashof_number(), Nusselt_from_Grashof(), Nusselt_from_Reynolds(), Nusselt_number(), Prandtl_number(), Qconduction_animal(), Qconduction_substrate(), Qconvection(), Qemitted_thermal_radiation(), Qevaporation(), Qmetabolism_from_mass_temp(), Qmetabolism_from_mass(), Qnet_Gates(), Qradiation_absorbed(), Qthermal_radiation_absorbed(), T_sky(), Tb_CampbellNorman(), Tb_Gates2(), Tb_Gates(), Tb_butterfly(), Tb_grasshopper(), Tb_limpetBH(), Tb_limpet(), Tb_lizard_Fei(), Tb_lizard(), Tb_mussel(), Tb_salamander_humid(), Tb_snail(), Tbed_mussel(), Tsoil(), actual_vapor_pressure(), boundary_layer_resistance(), external_resistance_to_water_vapor_transfer(), free_or_forced_convection(), heat_transfer_coefficient_approximation(), heat_transfer_coefficient_simple(), heat_transfer_coefficient(), saturation_vapor_pressure(), saturation_water_vapor_pressure()

Examples

  Reynolds_number(u  = 1,
                  D  = 0.001,
                  nu = 1.2)