Recently CHF enhancement has been reported for surfaces
Recently, CHF enhancement has been reported for surfaces with vertically aligned micro/nanostructures such as nanowires  and , micropillars , CNTs  and , and microridges . Researchers have suggested wettability increase, surface area enhancement, and efficient liquid wicking (due to Apicidin presence of vertical micro/nano structures) as the main reasons for CHF enhancement. Particularly, Chu et al.  and Zou et al.  presented interesting explanations for CHF enhancement on the surfaces they developed. Based on Kandlikar’s theory  (Eq. (8)), Chu et al.  hypothesized that micropillar structures can enhance the length of the liquid–vapor–solid triple contact line and consequently, the increase in solid–liquid adhesion force, which contributes to CHF enhancement.equation(8)qCHF″=hlgρg0.51+cosβ162π+π4(1+cosβ)cos?1/2σg(ρl-ρg)1/4where β is the dynamic receding contact angle and ? is the inclination angle of the heater surface to the horizontal base.