Comparison of Straight and Helical Nanotube Production in a Swirled Fluid CVD Reactor

Table 1

Comparison of calculated reference areas for helical and cylindrical tubes for different tube dimensions.

(𝑝,𝑟ℎ,𝑟𝑡)	Orientation	Cylindrical tube	Helical tube
(4, 2, 1)	Parallel	3.14	25.13
	Perpendicular	200	431.63
(4, 1, 1)	Parallel	3.14	12.57
	Perpendicular	200	284.52
(4, 0.5, 1)	Parallel	3.14	7.07
	Perpendicular	200	225.08
(1, 1, 1)	Parallel	3.14	12.57
	Perpendicular	200	379.55