Automated Compartment Model Development Based on Data from Flow-Following Sensor Devices
Abstract
:1. Introduction
2. Materials and Methods
2.1. Stirred Reactor Geometry
2.2. Experimental Conditions
2.3. Mixing Time
2.4. Flow-Following Sensor Devices
Processing of Sensor Device Data
3. Modelling
3.1. Data-Based Axial Compartment Model
3.1.1. Inter-Compartmental Flow Rates and Volumes
3.1.2. Automatic Zoning
3.2. Simulation of Tracer Pulses
3.3. CFD Simulations
4. Results and Discussion
4.1. Comparison of CFD and Sensor Device Derived Flow Rates
4.2. Comparison of Automatic Zoning
4.3. Comparison of CM-Simulated and Measured Mixing Times
5. Conclusions
- The approach to derive axial-flow rates from the sensor devices was appropriate, however, inaccuracies were present since the sensor devices were not ideal flow tracers.
- A value for the model parameter τcrit of 0.95 seconds was found to provide the most accurate predictions of the mixing in the vessel for the examined conditions (relative errors between 3–27%).
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Nomenclature
Variable | Description | Unit |
A | Cross-sectional area | [m2] |
B | Baffle width | [m] |
b | Impeller blade height | [m] |
C | Impeller clearance | [m] |
D | Impeller diameter | [m] |
g | Gravitational acceleration | [m/s2] |
HL | Liquid height | [m] |
K | Number of compartments | [-] |
Kinit | Initial number of compartments | [-] |
N | Impeller speed | [rpm] |
P | Pressure | [Pa] |
Q | Volumetric flow rate | [m3/s] |
Re | Reynolds number | [-] |
St | Stokes number | [-] |
T | Vessel diameter | [m] |
tm | Mixing time | [s] |
V | Volume | [m3] |
v | Velocity | [m/s] |
z | Axial dimension | [m] |
ε | Specific power input | [W/kg] |
ρ | Density | [kg/m3] |
τ | Local residence time | [s] |
τcrit | Critical local residence time | [s] |
µ | Dynamic viscosity | [Pa·s] |
Abbreviations | Description | |
CFD | Computational fluid dynamics | |
CM | Compartment model | |
IP | Injection point | |
PBT | Pitch blade turbine | |
RDT | Rushton disc turbine | |
RMS | Root mean square | |
S | Fixed sensor | |
SSE | Sum of squared errors |
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Relative Error | ||||
---|---|---|---|---|
ε1 | ε2 | ε3 | ε4 | |
RDT | 7% (2.3 s) | −16% (2.8 s) | −11% (1.5 s) | −26% (2.9 s) |
PBT | −3% (0.9 s) | −10% (1.4 s) | −21% (2.3 s) | −27% (2.9 s) |
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Bisgaard, J.; Tajsoleiman, T.; Muldbak, M.; Rydal, T.; Rasmussen, T.; Huusom, J.K.; Gernaey, K.V. Automated Compartment Model Development Based on Data from Flow-Following Sensor Devices. Processes 2021, 9, 1651. https://0-doi-org.brum.beds.ac.uk/10.3390/pr9091651
Bisgaard J, Tajsoleiman T, Muldbak M, Rydal T, Rasmussen T, Huusom JK, Gernaey KV. Automated Compartment Model Development Based on Data from Flow-Following Sensor Devices. Processes. 2021; 9(9):1651. https://0-doi-org.brum.beds.ac.uk/10.3390/pr9091651
Chicago/Turabian StyleBisgaard, Jonas, Tannaz Tajsoleiman, Monica Muldbak, Thomas Rydal, Tue Rasmussen, Jakob K. Huusom, and Krist V. Gernaey. 2021. "Automated Compartment Model Development Based on Data from Flow-Following Sensor Devices" Processes 9, no. 9: 1651. https://0-doi-org.brum.beds.ac.uk/10.3390/pr9091651