Enhanced pool boiling heat transfer on soft liquid metal surface

Pool boiling is a high-efficient energy transfer method through the gas-liquid phase transition. It has characteristics of small heat temperature difference and high flux density. The current enhancement realized mainly modifying solid heating surface. So far, there been no report on study pool soft surfaces. Therefore, in this work performances ethanol copper surface liquid metal are investigated experimentally. experimental results indicate that can effectively reduce wall superheat corresponding to onset (ONB). In saturation boiling, at ONB reduced by nearly 12 ℃, while coefficient improved 149%. found enhances performance significantly increasing nucleate site density, reducing bubble departure diameter, frequency. Unlike surface, deforms elastically under action vertical component tension <i>γ</i><sub>lv</sub>sin<i>θ</i> three-phase contact line vapor bubble. From perspective analysis, Δ<i>E</i><sub>LM</sub> between before after smaller than smooth Δ<i>E</i><sub>CS</sub>. potential barrier buoyancy required for separation small, easy separate. Elastocapillary wave jet phenomenon observed particularly, which generated elastic restoring force. fluctuation elastocapillary contributes mass thermal boundary layer generation residual nucleation site. grows up rapidly coalesces with rising large bubble, forming phenomenon. contribute