heat_transfer_coefficient: Estimate the Heat Transfer Coefficient Empirically

In TrenchR: Tools for Microclimate and Biophysical Ecology

Estimate the Heat Transfer Coefficient Empirically

Description

The function estimates the heat transfer coefficient for various taxa based on empirical measurements \insertCiteMitchell1976TrenchR.

Usage

heat_transfer_coefficient(u, D, K, nu, taxon = "cylinder")

Arguments

u	numeric air velocity (m s-1).
D	numeric characteristic dimension (e.g., diameter or snout-vent length) (meters).
K	numeric thermal conductivity of air (W K-1 m-1), can calculate using DRYAIR or WETAIR.
nu	numeric kinematic viscosity of air (m2 s-1), can calculate using DRYAIR or WETAIR.
taxon	character which class of organism, current choices: "sphere", "cylinder", "frog", "lizard_surface", "lizard_elevated", "flyinginsect", "spider". "cylinder" assumes 40 < Re < 4000. "lizard_surface" and "lizard_elevated" assume the lizard is prostrate on and elevated above the surface, respectively. The values are the average for lizards parallel and perpendicular to the air flow.

Value

numeric heat transfer coefficient, H_L (W K^-1 m^-2).

References

\insertAllCited

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(), boundary_layer_resistance(), external_resistance_to_water_vapor_transfer(), free_or_forced_convection(), heat_transfer_coefficient_approximation(), heat_transfer_coefficient_simple(), saturation_vapor_pressure(), saturation_water_vapor_pressure()

Examples

  heat_transfer_coefficient(u     = 0.5,
                            D     = 0.05,
                            K     = 25.7 * 10^(-3),
                            nu    = 15.3 * 10^(-6),
                            taxon = "cylinder")

TrenchR documentation built on Sept. 14, 2023, 1:07 a.m.