Prof.  Gangtao  LIANG
Dalian University of Technology,  China

Title: Boiling Heat Transfer on Two-Tier Hierarchical Structured Surface

Abstract:

Pool boiling on two-tier hierarchical structured surface is investigated with three-dimensional LB method. Two-tier pillar structures with different scales are designed, termed as primary and secondary pillar, respectively. On the hierarchical surface with upward-orientation secondary pillars, the bubble departure is promoted. And, the heat transfer can be improved by increasing the primary pillar spacing and enhancing surface wettability. Increasing the height of secondary pillar is favorable for enhancing capillary wicking, but can also bring greater flow resistance. On the hierarchical surface with lateral-orientation secondary pillars, the heat transfer is limited by the large flow resistance. With the enlargement of primary pillar spacing, the impact brought by flow resistance is moderated, and the heat flux can be enhanced. Finally, the boiling performance regarding the effect of wall temperature is concerned, where the structured surface with upward-orientation secondary pillars show the better boiling performance than other structured surfaces.

Biography:

Prof. Liang received his B.Eng. in 2009 and Ph.D. in 2014 from Dalian University of Technology, where he remained as a faculty member. He undertook his postdoctoral research from 2015 to 2017 at Purdue University Boiling and Two-Phase Flow Laboratory (PU-BTPFL), where he was dedicated to experimental investigation and theoretical modeling of two-phase flow and heat transfer. He was appointed to Associate Professor in advance in 2016 because of his outstanding work in the areas of heat transfer and fluid mechanics. His primary research interests are two-phase flow and heat transfer, covering droplets impingement, spray cooling, micro-channel flow boiling and condensation, horizontal-tube falling film evaporation, and boiling enhancement. He has published over 80 papers, including more than 50 archival journal papers in Int. J. Heat Mass Transfer, Int. Commun. Heat Mass Transfer, Exp. Therm. Fluid Sci., Acta Mech., Numer. Heat Transfer, and Ind. Eng. Chem. Res. He has been internationally recognized for his great contributions to the droplets impact research and a series of high-quality review papers for two-phase heat transfer topics. He is currently Advisory Board Member of Heat Transfer Division in Cambridge Scholars Publishing, International Advisory Board Member of Thermal Science Journal, and Editorial Board Member of Fluid Dynamics & Materials Processing. He also serves as an outstanding reviewer for many international journals.