Boundary Layer Resistance

The function estimates boundary layer resistance under free convection based on the function in Riddell et al. (2018) .

boundary_layer_resistance(T_a, e_s, e_a, elev, D, u = NA)

Arguments

T_a

numeric air temperature (K).

e_s

numeric saturation vapor pressure (kPa).

e_a

numeric actual vapor pressure (kPa).

elev

numeric elevation (m).

D

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

u

numeric wind speed (m s^-1), if not provided assume free convection; if provided, use forced convection if appropriate.

Value

numeric boundary layer resistance (s cm^-1).

References

Riddell EA, Odom JP, Damm JD, Sears MW (2018). “Plasticity reveals hidden resistance to extinction under climate change in the global hotspot of salamander diversity.” Science Advances, 4(4). doi:10.1126/sciadv.aar5471 .

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(), Reynolds_number(), 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(), 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()

Author

Eric Riddell

Examples

  boundary_layer_resistance(T_a  = 293,
                            e_s  = 2.5,
                            e_a  = 2.0,
                            elev = 500,
                            D    = 0.007,
                            u    = 2)
#> [1] 0.3641435