**Greek symbols**

δ; thickness, m

∆T; air side temperature difference obtained using analytical model of heat exchanger, °C *<sup>Δ</sup>T*¯ ; air side temperature difference obtained from the CFD simulations, °C


ηf ; fin efficiency

μ; dynamic viscosity, Ns/m2

ν; kinematic viscosity, m<sup>2</sup> /s

ξ; Darcy Weisbach friction factor
