Stirred Tank Reactors

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The CARPET program

• Acronym for CFD Applied to Reactor ProcEss
  Technology
• A merged Strategic University (SUP)- and a
  Strategic Institute (SIP) Program
• Program duration from 2001 through 2004
• Total budget 16.9 MNOK financed by NFR
• 5 NTNU Doctorates (and 1 NTNU PostDoc) -
  Experimental characterization of dispersed
  multiphase flows - Modeling of dispersed
  multi-fluid flow in chemical reactors - Modeling
  of Fluidized bed reactors - Application of Large
  Eddie Simulation (LES) in reactor modeling -
  Experiments on near-interface flow phenomena
• 3 SINTEF research institutes (Materials
  Technology, Chemistry and Mathematics)
• 2 NTNU departments (Chemical Engineering and
  Energy and Process Technology)
• www.carpet.ntnu.no

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Steering group
Stein Tore Johansen, SINTEF Materialteknologi Marc
Dhainaut , SINTEF Materialteknologi Harald Laux,
SINTEF Materialteknologi Paal Skjetne, SINTEF
Kjemi Trond Kvamsdal, SINTEF Matematikk Tor
Ytrehus, NTNU Energi og prosessteknikk Hugo
Jakobsen, NTNU Kjemisk prosessteknologi Hallvard
Svendsen, NTNU Kjemisk prosessteknologi
Secretary
Elisabeth Thorbjørnsen
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Contact team for the PhD students
Håvard Lindborg -         Hugo
Jakobsen -         Harald Laux -         Stein
Tore Johansen -         Magne Lysberg -        
Leif Rune Hellevik -         Carl Birger Jensen  
Thomas Braseth -         Stein Tore Johansen
-         Reidar Kristoffersen -         Knut
Bech -         Ernst Meese -         Benjamin
Ravary -         Trond Kvamsdal -         Rune
Engeskaug -         Carl Birger Jensen  
Elisabeth Thorbjørnsen -         Hallvard F.
Svendsen -         Svend Grådahl -         Pål
Tetlie -         Kai Hjarbo -         Knut
Bech -         Marc Dhainaut    
Carlos Dorao -         Hugo Jakobsen -        
Stein Tore Johansen -         Paal
Skjetne -         Marc Dhainaut -         Carl
Birger Jensen
Maria Fernandino -         Tor Ytrehus -        
Knut Bech -         Hallvard Svendsen -        
Svend Grådahl -         Pål Tetlie -         Kai
Hjarbo
 
 
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• Objectives
• The main goals of the program are to develop new
  physical models for fluid flow computations,
  particularly focused on models applicable to
  design and optimization of chemical and
  metallurgical processes, and to strengthen the
  academic education and research in these fields
  at NTNU and SINTEF by
• Graduating a minimum of 5 doctorates within these
  fields and strengthen the collaboration with
  international research groups through exchange on
  doctoral and post doc. level.
• Developing model programs and experimental
  validation tools for a selection of specific
  applications.
• Establish a graduate course in advanced reactor
  technology and multiphase flow.
• Strengthen the links between the fundamental and
  applied research, and the Norwegian industry.

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The CARPET Project Dissemination of information

• We aim at publishing a minimum of 25-30 papers
  and contributions in refereed journals and at
  national and international conferences.
• We will arrange semi-annual seminars where the
  dr.ing fellows and researchers will present their
  work for invited industrial partners and other
  interested parties.
• Close collaboration with the NFR- and industry
  supported programme HiPGaS will be maintained
  (see www.hipgas.ntnu.no).

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The CARPET Project Results?

• Improved Knowlege on
• Multiphase Flow Modeling (bubbles/particles -
  Stratified)
• Population Balance Modeling (coalescence/breakup)
• Turbulence Modeling (single- and multiphase Flow,
  LES)
• Granular Flow Modeling
• Numerical Schemes (Convection, Interface,
  Cut-Cells, LB)
• Simulation and Validation of Stirred Tanks
  (Stirrer/Heat)
• Experimental Techniques (Fluid Particles,
  Interface, bulk)
• Discrete Element Method (DEM)
• Project Administration!

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The CARPET Project Results?

• Number of Journal Publications 8
• List of student contributions
• A Numerical Study of the Interactions Between
  Viscous Flow, Transport and Kinetics in Fixed Bed
  Reactors
• Jakobsen, H. A., Lindborg, H. and Handeland, V.
  Computers Chemical Engineering, 26 (3),
  333-357, 2002.
• Number of Conference Presentations 9
• List of student contributions
• Parallelization and Performance Optimization of
  a Dynamic CFD Reactor Model
• Lindborg, H., Eide, V., Unger, S., Henriksen,
  S. T. and Jakobsen, H.A.
• CHISA 2002, Prague, Czech Republic, August
  25-29, 2002. Paper no. E6.3.
• Numerical Analysis and Experimental Validation
  of Bubble Size Distributions in Two-Phase Bubble
  Column Reactors
• Bertola, F., Grundseth, J., Hagesæther, L.,
  Dorao, C., Luo, H., Hjarbo, K. W., Svendsen, H.
  F., Vanni, M., Baldi, G. and Jakobsen, H. A. 3rd
  European-Japanese Two-Phase Flow Group Meeting,
  Certosa di Pontignano, September 21-27th, 2003.
• Reports 6
• Compendium on Multiphase Flow Modeling

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The CARPET Project PhD Courses

• Chemical Engineering
• - Reactor Technology (1)
• - Advanced Reactor Modeling (2)
• - Industrial Colloid Chemistry (1)

Mechanical Engineering - Viscous Flow and
Turbulence (1) - Experimental Methods in Process
Engineering (1) - Multiphase Flow Modeling (3) -
Turbulence (1) - Rheology and non-Newtonian
Fluids (1) - Computational Heat and Fluid Flow
(4) - Advanced Computational Fluid Dynamics (4)
Language and communication studies (Institutt for
Språk og kommunikasjonsstudier) - Scientific
Writing and Oral Presentation (1)
Informatics, Matematics and Electronics (IME) -
Introduction to Supercomputing (3)

• Self Study
• A study of bubbles, drops and particles (1)
• Modeling of dispersed fluid particle transport
  and interaction phenomena (1)
• Modeling of Turbulence in Multiphase Flow (1)
• Granular Theory (1)
• Introduction to measurement techniques (von
  Karman Institute) (2)

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The HiPGaS Project PhD Courses
Physics - Classical Transport Theory (1)

• Chemical Engineering
• - Reactor Technology (1)
• - Advanced Reactor Modeling (1)
• - Industrial Colloid Chemistry (1)
• - Applied Thermodynamics (1)
• - Fluid Phase Equilibria (1)

Mechanical Engineering - Viscous Flow and
Turbulence (1) - Multiphase Flow Modeling (1) -
Turbulent Flow (1) - Computational Heat and Fluid
Flow (2) - Advanced Computational Fluid Dynamics
(1)

• Self Study
• A study of bubbles, drops and particles (2)
• Modeling of dispersed fluid particle transport
• and interaction phenomena (1)
• A study of gas-droplet flow in separator units
  (1)
• Selected Topics on Measuring Techniques (1)
• Laboratory Course on Instrumentation and Control
  (1)
• Safety and Hazop analyzes (1)
• Information Search (2)
• Research Dissemination (1)
• Introduction to measurement techniques (von
  Karman Institute) (1)
• Phase Equilibria in the Chemical, Biochemical
  and Petroleum Industries (DTU) (1)

Language and communication studies - Scientific
Writing and Oral Presentation (2)

• Chemistry
• Statistical Thermodynamics and Computer
  Simulations (1)
• Thermodynamics of Hydrocarbon Mixtures (1)

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Common fields of interest
Bubble column

• Investigations
• bubble coalescence
• bubble breakup
• population balance
• flow pattern
• Coherent structures
• High pressure

Separation equipment

• Investigations
• droplet coalescence
• droplet breakup
• droplet entrainment
• droplet deposition
• high pressure system
• flow pattern
• Thermodynamics
• population balance
• Global and meso- scale separation efficiency

Fluidized bed reactor
injection (gas / droplets)

• Investigations
• particle interaction
• Reactions
• Flow pattern
• Heat Transport
• Component Transport
• High pressure
• Coherent structures

injection (gas)
Stirred Tank

• Investigations
• bubble coalescence
• bubble breakup
• population balance
• Flow pattern
• Heat Transport

Experiments

• Techniques
• PIV / PTV
• Probes
• LDV

• Techniques
• PIV / PTV
• Probes
• LDV

Experiments
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CARPET and HiPGaS Ph.D. students
CARPET
HiPGaS
Macro scale
Scrubber Reactors
Thomas Braseth
Trond Austrheim
Håvard Lindborg
Cecilie Gotaas
Carlos Dorao
Alexandre Brigadeau
Elisabeth Torbjørnsen
Meso scale
Particle collision Film draining Coalescence Break
up Deposition Entrainment
Maria Fernandino
Thomas Helsør
Kurt Schmidt
Micro scale
Marangoni effect Colloid chemestry Coalescence
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The CARPET Project Initial Budget

• SINTEF 2100 2200 2200 2200 8700
• NTNU 1600 2200 2200 2200 8200
• Main activities 2001 2002 2003 2004 Total
• 5 Dr.ing 600 1910 1910 1580 6000
• SINTEF M.T 775 650 650 800 2875
• SINTEF A.C 725 600 600 750 2675
• SINTEF A.M 300 300 300 300 1200
• Post Doc. 240 240 240 240 960
• Progr. Mangm. 300 250 250 300 1100
• Conf. travel 250 250 250 300 1050
• Equipment 300 200 200 130 830
• Contingencies 210
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• Total 3700 4400 4400 4400 16900

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The CARPET Project Budget November 2003