Discrete Bubble Model for Prediction of Bubble Behavior in 3D Fluidized Beds

2012 ◽  
Vol 35 (5) ◽  
pp. 929-936 ◽  
Author(s):  
S. Movahedirad ◽  
M. Ghafari ◽  
A. M. Dehkordi
Keyword(s):  
Fluidized Beds ◽  
Bubble Behavior

Numerical investigation of gas bubble behavior in tapered fluidized beds

Particuology ◽  
2018 ◽  
Vol 38 ◽  
pp. 152-164 ◽  
Author(s):  
Ramin Khodabandehlou ◽  
Hossein Askaripour ◽  
Asghar Molaei Dehkordi
Keyword(s):  
Numerical Investigation ◽  
Fluidized Beds ◽  
Gas Bubble ◽  
Bubble Behavior

scholarly journals Bubble Properties in Bubbling and Turbulent Fluidized Beds for Particles of Geldart’s Group B

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1098
Author(s):  
Tom Wytrwat ◽  
Mahdi Yazdanpanah ◽  
Stefan Heinrich
Keyword(s):  
Fluidized Beds ◽  
Pressure Fluctuations ◽  
Bubble Velocity ◽  
Turbulent Regime ◽  
Bubble Behavior ◽  
Low Velocity ◽  
Group B ◽  
Superficial Gas Velocity ◽  
Bubble Properties

Predicting bubble properties in fluidized beds is of high interest for reactor design and modeling. While bubble sizes and velocities for low velocity bubbling fluidized beds have been examined in several studies, there have been only few studies about bubble behavior at superficial gas velocities up into the turbulent regime. For this reason, we performed a thorough investigation of the size, shape and velocity of bubbles at superficial gas velocities ranging from 0.18 m/s up to 1.6 m/s. Capacitance probes were used for the determination of the bubble properties in three different fluidized bed facilities sized of 0.1 m, 0.4 m and 1 m in diameter. Particles belonging to Geldart’s group B (Sauter mean diameter: 188 µm, solid density: ρs = 2600 kg/m3) were used. Correlations for the determination of bubble phase holdup, vertical bubble length and bubble velocity are introduced in this work. The shape of bubbles was found to depend on superficial gas velocity. This implies that at large superficial gas velocities the horizontal size of a bubble must be much smaller in comparison to its vertical size. This leads to a decrease of pressure fluctuations, which is observed in the literature as a characteristic of transitioning into a turbulent regime.

Experiments and meso-scale modeling of phase holdups and bubble behavior in gas-liquid-solid mini-fluidized beds

2018 ◽  
Vol 192 ◽  
pp. 725-738 ◽  
Author(s):  
Xiangnan Li ◽  
Mingyan Liu ◽  
Yongli Ma ◽  
Tingting Dong ◽  
Dong Yao
Keyword(s):  
Fluidized Beds ◽  
Bubble Behavior ◽  
Scale Modeling ◽  
Meso Scale

Single bubble behavior in gas–liquid–solid mini-fluidized beds

2016 ◽  
Vol 286 ◽  
pp. 497-507 ◽  
Author(s):  
Yanjun Li ◽  
Mingyan Liu ◽  
Xiangnan Li
Keyword(s):  
Fluidized Beds ◽  
Single Bubble ◽  
Bubble Behavior
Sign in / Sign up

Export Citation Format

Share Document