Table 3.

Model input.

Geometry and property	Value
Diameter of the channel	$D_{\text{h}}=180\text{μm},110\text{μm}$
Width of the channel	$W={\text{D}}_{\text{h}}/2^{\ast }\pi$
Thickness of the wall	$t{h}_{\text{w}}=100\mu \text{m}$
Thermal conductivity of wall	$k_{\text{w}}=16\text{W}\cdot {\text{m}}^{-1}\cdot {\text{K}}^{-1}@300\text{K}$
	$k_{\text{w}}=10\text{W}\cdot {\text{m}}^{-1}\cdot {\text{K}}^{-1}@150\text{K}$
	$k_{\text{w}}=6\text{W}\cdot {\text{m}}^{-1}\cdot {\text{K}}^{-1}@70\text{K}$
Thermal conductivity of fluid	$k_{\text{f}}=0.025\text{W}\cdot {\text{m}}^{-1}\cdot {\text{K}}^{-1}@300\text{K}$
	$k_{\text{f}}=0.014\text{W}\cdot {\text{m}}^{-1}\cdot {\text{K}}^{-1}@150\text{K}$
	$k_{\text{f}}=0.145\text{W}\cdot {\text{m}}^{-1}\cdot {\text{K}}^{-1}@70\text{K}$
Viscosity of fluid	$\overline{\mu }=17\times {10}^{-6}\text{Pa-s}$
	$\overline{\mu }=10\times {10}^{-6}\text{Pa-s}$
	$\overline{\mu }=164.95\times {10}^{-6}\text{Pa-s}$
Heat capacity of fluid	$c_{\text{p}}=1047\text{kJ}\cdot {\text{kg}}^{-1}\cdot {\text{K}}^{-1}$
	$c_{\text{p}}=1089\text{kJ}\cdot {\text{kg}}^{-1}\cdot {\text{K}}^{-1}$
	$c_{\text{p}}=2024\text{kJ}\cdot {\text{kg}}^{-1}\cdot {\text{K}}^{-1}$
Heat input to wall	0.1 W
Nusselt number	$Nu=4.36$