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dot-get_nu

Nu: Nusselt number

Description

Nu: Nusselt number

Usage

.get_nu(T_leaf, surface, pars, unitless)

Arguments

T_leaf

Leaf temperature in Kelvin
surface

Leaf surface (lower or upper)
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

The Nusselt number depends on a combination how much free or forced convection predominates. For mixed convection:

Nu = (a Re ^ b) ^ 3.5 + (c Gr ^ d) ^ 3.5) ^ (1 / 3.5)


Symbol R Description Units Default
a, b, c, d a, b, c, d empirical coefficients none calculated
Gr Gr Grashof number none calculated
Re Re Reynolds number none 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_nu(T_leaf, "lower", c(cs, ep, lp), FALSE)
tealeaves

Solve for Leaf Temperature Using Energy Balance

v1.0.5
MIT + file LICENSE
Authors
Chris Muir [aut, cre] (<https://orcid.org/0000-0003-2555-3878>)
Initial release
2020-06-17

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