Residence Time Distribution Study of a Living/Controlled Radical Miniemulsion Polymerization System in a Continuous Tubular Reactor

2011 ◽  
Vol 5 (9-10) ◽  
pp. 431-442 ◽  
Author(s):  
Thomas E. Enright ◽  
Michael F. Cunningham
Keyword(s):  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Tubular Reactor ◽  
Miniemulsion Polymerization ◽  
Distribution Study ◽  
Polymerization System

Radiotracer method for residence time distribution study in multiphase flow system

2009 ◽  
Vol 67 (7-8) ◽  
pp. 1445-1448 ◽  
Author(s):  
S. Sugiharto ◽  
Z. Su’ud ◽  
R. Kurniadi ◽  
W. Wibisono ◽  
Z. Abidin
Keyword(s):  
Multiphase Flow ◽  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Flow System ◽  
Radiotracer Method ◽  
Distribution Study

Modeling of a Porous Reactor for Supercritical Water Oxidation by a Residence Time Distribution Study

2003 ◽  
Vol 42 (10) ◽  
pp. 2122-2130 ◽  
Author(s):  
E. Fauvel ◽  
C. Joussot-Dubien ◽  
E. Pomier ◽  
P. Guichardon ◽  
G. Charbit ◽  
...  
Keyword(s):  
Residence Time ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Supercritical Water Oxidation ◽  
Distribution Study

scholarly journals Spatial and Temporal Validation of a CFD Model Using Residence Time Distribution Test in a Tubular Reactor

Computation ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 94
Author(s):  
José Rivas ◽  
M. Constanza Sadino-Riquelme ◽  
Ignacio Garcés ◽  
Andrea Carvajal ◽  
Andrés Donoso-Bravo
Keyword(s):  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Fluid Dynamic ◽  
Tubular Reactor ◽  
Temporal Distribution ◽  
Cfd Model ◽  
Ansys Fluent ◽  
Cfd Models ◽  
Temporal Validation

Computational fluid dynamic (CFD) has been increasingly exploited for the design and optimization of (bio)chemical processes. Validation is a crucial part of any modeling application. In CFD, when validation is done, complex and expensive techniques are normally employed. The aim of this study was to test the capability of the CFD model to represent a residence time distribution (RTD) test in a temporal and spatial fashion inside a reactor. The RTD tests were carried out in a tubular reactor operated in continuous mode, with and without the presence of artificial biomass. Two hydraulic retention times of 7.2 and 13 h and superficial velocities 0.65, 0.6, 1.3, and 1.1 m h−1 were evaluated. As a tracer, an aqueous solution of methylene blue was used. The CFD model was implemented in ANSYS Fluent, and to solve the equations system, the SIMPLE scheme and second-order discretization methods were selected. The proposed CFD model that represents the reactor was able to predict the spatial and temporal distribution of the tracer injected in the reactor. The main disagreements between the simulations and the experimental results were observed, especially in the first 50 min of the RTD, caused by the different error sources, associated to the manual execution of the triplicates, as well as some channeling or tracer by-pass that cannot be predicted by the CFD model. The CFD model performed better as the time of the experiment elapsed for all the sampling ports. A validation methodology based on an RTD by sampling at different reactor positions can be employed as a simple way to validate CFD models.

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