dot-get_gr: Gr: Grashof number

In muir-lab/tleavesMC: Schymanski Equation

Description

Gr: Grashof number

Usage

.get_gr(T_leaf, pars, unitless)

Arguments

T_leaf	Leaf temperature in Kelvin
pars	Concatenated parameters (leaf_par, enviro_par, and constants)
unitless	Logical. Should function use parameters with units? The function is faster when FALSE, but input must be in correct units or else results will be incorrect without any warning.

Details

Gr = t_air G d ^ 3 abs(Tv_leaf - Tv_air) / D_m ^ 2

Symbol	R	Description	Units	Default
d	leafsize	Leaf characteristic dimension in meters	m	0.1
D_m	D_m	diffusion coefficient of momentum in air	m^2 / s	calculated
G	G	gravitational acceleration	m / s^2	9.8
t_air	t_air	coefficient of thermal expansion of air	1 / K	1 / Temp
Tv_air	Tv_air	virtual air temperature	K	calculated
Tv_leaf	Tv_leaf	virtual leaf temperature	K	calculated

Value

A unitless number of class units

Examples

library(tealeaves)

cs <- make_constants()
ep <- make_enviropar()
lp <- make_leafpar()

T_leaf <- set_units(298.15, K)

tealeaves:::.get_gr(T_leaf, c(cs, ep, lp), FALSE)

muir-lab/tleavesMC documentation built on July 5, 2020, 12:23 a.m.