Numerical analysis of heat and mass transfer in multiphase flows

2014 Fiscal Year Final Research Report

• Project/Area Number: 23686030
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Fluid engineering
• Research Institution: Osaka University
• Principal Investigator: TAKEUCHI Shintaro 大阪大学, 工学(系)研究科(研究院), 准教授 (50372628)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: 混相流れ / 熱輸送

Outline of Final Research Achievements

Heat transfer problem in solid-dispersed two-phase flow is numerically studied. The temperature distribution within the particles and heat exchange between the fluid and particles are solved by a newly developed interfacial heat flux model. The model is thoroughly validated through comparisons with the analytical solutions of heat conduction problems.
The method is applied to natural convection problems including multiple particles. Heat transfer and particle behaviours are studied for different solid volume fractions and heat conductivity ratios (solid to fluid). A transition of the particulate flow structure to oscillatory modes is newly found to take place. The study shows that the difference in the time scales of heat transfer through the fluid and solid is responsible for the oscillation, and the results highlight the effects of temperature gradient within the finite-sized particles on the flow structure and heat transfer in the solid-dispersed multiphase flows.

Free Research Field

数値流体力学