Jet Impingement Heat Transfer from Superheated, Superhydrophobic Surfaces


Book Description

The second study compares jet impingement heat transfer from SH surfaces of varying microstructures. Similar thermal effects due to modified jet ReD and initial surface temperature were observed. Modifying geometric pattern from microposts to microholes, altering cavity fraction, and changing feature pitch and width had little impact on heat transfer. However, reducing feature height on the post surfaces facilitated water penetration within the microstructure, slightly enhancing thermal transport.







Thermal Transport at Superhydrophobic Surfaces in Impinging Liquid Jets, Natural Convection, and Pool Boiling


Book Description

This dissertation focuses on the effects of superhydrophobic (SHPo) surfaces on thermal transport. The work is divided into two main categories: thermal transport without phase change and thermal transport with phase change. Thermal transport without phase change is the topic of four stand-alone chapters. Three address jet impingement at SHPo surfaces and the fourth considers natural convection at a vertical, SHPo wall. Thermal transport with phase change is the topic of a single stand-alone chapter exploring pool boiling at SHPo surfaces.







Enhancement of Jet Impingement Heat Transfer Using Shape Modification and Phase Change


Book Description

Seeks to enhance heat transfer rate performance on high heat flux surfaces while maintaining a uniform and low temperature of the substrate. Determines shapes which maximize heat transport from heater surfaces when using jet impingement cooling method and models a two-phase jet impingement process which incorporates phase change at the impingement substrate.