Computational fluid dynamics analysis of mixing and gas–liquid mass transfer in wave bag bioreactor

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Kirilynn Svay ◽  
Christine Urrea ◽  
Parviz Ayazi Shamlou ◽  
Hu Zhang
Keyword(s):  
Fluid Dynamics ◽  
Mass Transfer ◽  
Computational Fluid Dynamics ◽  
Dynamics Analysis ◽  
Liquid Mass ◽  
Computational Fluid Dynamics Analysis ◽  
Liquid Mass Transfer

Computational-fluid-dynamics (CFD) analysis of mixing and gas–liquid mass transfer in shake flasks

2005 ◽  
Vol 41 (1) ◽  
pp. 1 ◽  
Author(s):  
Wellae Williams-Dalson ◽  
Hu Zhang ◽  
Eli Keshavarz-Moore ◽  
Parviz Ayazi Shamlou
Keyword(s):  
Fluid Dynamics ◽  
Mass Transfer ◽  
Computational Fluid Dynamics ◽  
Cfd Analysis ◽  
Liquid Mass ◽  
Shake Flasks ◽  
Computational Fluid Dynamics Cfd ◽  
Liquid Mass Transfer

Murphree vapor efficiency prediction in SCC columns by computational fluid dynamics analysis

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mortaza Zivdar ◽  
Nasim Shahrouei
Keyword(s):  
Fluid Dynamics ◽  
Experimental Data ◽  
Mass Transfer ◽  
Computational Fluid Dynamics ◽  
Liquid Film ◽  
Radial Distance ◽  
Dynamics Analysis ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Computational Fluid Dynamics Analysis

Abstract The spinning cone columns (SCC) are one of the distillation columns with increasing applications in food industries. The geometrical complexity and different flow regimes, besides the presence of moving parts, make the design and analysis of these columns challenging. Computational fluid dynamics analysis of SCC columns has shown promising results in analyzing the performance of these towers. The majority of previous works were pertinent to the air/water systems. Therefore, the application of these results to real systems is not very clear. In this study, the liquid film thickness, mass transfer coefficients, HETP, and Murphree vapor efficiency for the water/ethanol system have been predicted in a pilot-scale column. The results show that by increasing the radial distance from the axis, the thickness of the liquid film gradually decreases. This finding is also in consistent with the experimental results. The maximum thickness of the liquid film is <1 mm and is near the axis. Mass transfer coefficients in the liquid phase and in the gas phase increase slightly with increasing flow velocity and remain almost unchanged. The average values of these coefficients in the liquid and gas phases are 0.023 (s−1) and 1.21 (s−1), respectively. HETP increased with increasing gas velocity, the range of which varies between 0.092 and 0.375 m. Also, Murphree vapor efficiency at three rotational speeds of 550, 750, and 1000 rpm are predicted and compared with the experimental data. The results show that the efficiency has been decreased by increasing the strip ratio and increased by increasing the rotational speed. Minimum and maximum efficiencies obtained are 3.48 and 24.56% corresponding to strip ratio = 27.1% and RPM = 550 plus strip ratio = 9.15% and RPM = 1000, respectively. The predicted efficiencies are in a reasonable agreement (within 10.3%) with experimental data.

Computational Fluid Dynamics Analysis of a 12 MW Circulating Fluidized Bed Rise

2020 ◽  
Author(s):  
Deepthi Chandramouli ◽  
Mehrdad Shahnam ◽  
William Rogers
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Dynamics Analysis ◽  
Computational Fluid Dynamics Analysis
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