Abstract
Multiple droplets are drops of water that continuously dropped onto a surface. Spray cooling is an application of the use of droplet on a cooling system. Spray cooling is usually used in a cooling system of electronic devices, and material quenching. In this study, correlations between Weber number and surface temperature decrease rate during multiple droplets impingement are investigated and analyzed. Visualization process is used to help determine the evaporation time of droplets impingement by using high speed camera. Induction stove is used to maintain a stainless steel surface temperature at 120°C, 140°C, and 160°C. The Weber number was varied at 15, and 52.5 to simulate low and medium Weber number. The result of this study shows that increase in Weber number does not increase the temperature decrease rate noticeably. Whereas the Weber number decrease the time required for surface temperature to reach its lowest surface temperature. It was also found that for low and medium Weber number, Weber number affect the evaporation time of multiple droplets after impingement.
Highlights
Multiple droplets are a series of droplet released with certain interval continuously onto a surface
The aim of present research is to study the effect of Weber number to heat transfer phenomena on multiple droplets impinging hot stainless steel surface, mainly the surface temperature decrease rate and droplets evaporation time
This present work is mainly focused on the effect of Weber number and surface temperature to temperature decrease rate during droplet impingement
Summary
Multiple droplets are a series of droplet released with certain interval continuously onto a surface. One of the factors that influences the heat transfer of droplet during impact onto a heated solid surface is the Weber number (We). The effects of the wettability of a droplet impingement onto a hot solid surface under medium Weber number had been studied experimentally using varying surface coating. With surface temperature varied between 63-605 to cover entire spectrum of heat transfer and droplet size ranging from 0.07 to 1.8 mm to simulate spray cooling diameter and liquid included water and carbon fuel. The aim of present research is to study the effect of Weber number to heat transfer phenomena on multiple droplets impinging hot stainless steel surface, mainly the surface temperature decrease rate and droplets evaporation time. Visualization was used to help observation of droplet evaporation time after impingement
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
