Surface-particle-emulsion heat transfer model between fluidized bed and horizontal immersed tube |
| |
Institution: | 1. Applied Science School, University of Science and Technology Beijing, Beijing 100083, China;2. Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China |
| |
Abstract: | A mathematical model, surface-particle-emulsion heat transfer model, is presented by considering voidage variance in emulsion in the vicinity of an immersed surface. Heat transfer near the surface is treated by dispersed particles touching the surface and through the emulsion when the distance from the surface is greater than the diameter of a particle. A film with an adjustable thickness which separates particles from the surface is not introduced in this model. The coverage ratio of particles on the surface is calculated by a stochastic model of particle packing density on a surface. By comparison of theoretical solutions with experimental data from some references, the mathematical model shows better qualitative and quantitative prediction for local heat transfer coefficients around a horizontal immersed tube in a fluidized bed. |
| |
Keywords: | fluidized bed heat transfer two-phase flow mathematical model |
本文献已被 万方数据 等数据库收录! |
| 点击此处可从《矿物冶金与材料学报》浏览原始摘要信息 |
| 点击此处可从《矿物冶金与材料学报》下载免费的PDF全文 |