dot-get_gr: Gr: Grashof number

In cdmuir/tealeaves: Solve for Leaf Temperature Using Energy Balance

Gr: Grashof number

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_\mathrm{air} G d ^ 3 |T_\mathrm{v,leaf} - T_\mathrm{v,air}| / D_\mathrm{m} ^ 2

Symbol	R	Description	Units	Default
d	leafsize	Leaf characteristic dimension in meters	m	0.1
D_\mathrm{m}	D_m	diffusion coefficient of momentum in air	m^2 / s	calculated
G	G	gravitational acceleration	m / s^2	9.8
t_\mathrm{air}	t_air	coefficient of thermal expansion of air	1 / K	1 / Temp
T_\mathrm{v,air}	Tv_air	virtual air temperature	K	calculated
T_\mathrm{v,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)

cdmuir/tealeaves documentation built on Feb. 28, 2024, 8:21 a.m.