Abstract
This paper presents effects of inclination angle of a heated plate on laminar natural convection flow with sub-millimeter bubbles. The use of thermocouples is applied to temperature measurements and an image processing technique is used to estimate the bubble velocity. For each inclination angle of the heated plate (i.e., φ=80 ° and φ=90 °), the heat transfer coefficient with bubble injection is higher than that without bubble injection. In addition, the heat transfer coefficient with bubble injection for φ=80 ° is higher than that for φ=90 °. The main reason for this is an increase in the mixing effect due to rising bubbles near the heated wall.
