Gas-assisted non-newtonian fluid displacement in circular tubes and noncircular channels
- 作者：Kamisli ; Fethi ; Ryan ; Michael E.
- 关键词：Two-phase flow ; Gas-assisted flow ; Shear thinning fluid ; Viscoelastic fluid
- 刊名：Chemical Engineering Science
- 出版年：2001
- 期刊代码：18_00092509
- 类别：ce
- 出版时间：August, 2001
- 卷：56
- 期：16
- 页码：4913-4928
- 文件大小：274 K
摘要
The motion of long bubbles into Newtonian and non-Newtonian fluids confined in horizontal circular tubes, rectangular channels, and square cross-sectional channels has been studied both theoretically and experimentally. Of particular interest is the determination of residual liquid film thickness on the walls. Isothermal experiments have been conducted to measure the displacement of the gas–liquid interface as a function of the applied pressure differential. The velocity of the interface and residual liquid film thickness have been determined for both Newtonian and non-Newtonian (shear thinning and viscoelastic) fluids. These experimental results are in good agreement with similar experimental studies conducted by other investigators. The experimental results indicate that the liquid film thickness of constant viscosity viscoelastic fluids (Boger fluids) deposited on the tube wall is thicker than that of comparable Newtonian fluids.