. Author manuscript; available in PMC: 2018 Sep 1.

Published in final edited form as: J Intell Mater Syst Struct. 2017 Jan 24;28(16):2167–2183. doi: 10.1177/1045389X16685443

Table 2.

Heat Transfer Parameters

Parameters	Symbols	Units	Values
SMA spring wire
Resistivity	β_s	μΩ·m	0.44
Density	ρ_s	kg/m³	6450 (Dynalloy, 2011)
Thermal conductivity	k_s	W/(m·K)	18 (Ertel and Mascaro, 2010)
Specific heat capacity	C_s	J/(kg·K)	466 (heating) −260 (cooling) refer to Figure 6
Latent heat of transformation (heating)	L_sh	J/kg	12188.1
Latent heat of transformation (cooling)	L_sc	J/kg	−4137.6

Water
Temperature	T_w	K	300
Specific heat capacity	C_w	J/(kg·K)	4179 (Incropera, 2006)
Convection coefficient	h_w	W/(m² °C)	refer to Section 4.1
Acceleration of gravity	g	m/s²	9.81