The document outlines a comprehensive guide to fluidized bed modeling using ANSYS Fluent R19, detailing the steps from geometry creation in SpaceClaim to mesh generation and setup of multiphase models. It includes instructions for defining boundary conditions, initialization, running simulations, and post-processing results. Key components such as model structure, mesh refinement, and calculation controls are also discussed to aid users in effectively conducting their simulations.

1. Fluidized Bed modeling using
R19
(Learning ASNYS Fluent 19 Modeling Algorithm)
Hamed Hoorijani
M.Sc. Student at the university of Tehran
Hoorijani@ut.ac.ir
Hoorijani.h@gmail.com
Linked : https://www.linkedin.com/in/hamed-hoorijani/
: Hamed Hoorijani
July 2019
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2. Ansys Fluent R19
Project Schematic
Where you build your model based on your physics but mainly for fluent we have
Pre- Processing (Geometry  Mesh ) Processing (Fluent)  Post-Processing (Results)
Toolbox
A library of applicable
softwares that gives the
user a wide choice
Messages
Where you can see the errors or warnings of your model in general
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3. Geometry
• Add Geometry from toolbox to the Project
Schematic
Build the geometry using tools provided in the
Space Claim*
*( This Software requires extensive practice to Master the various tools
provided in different Parts of the Software)
300 mm300 mm
100 mm
1000mm
400mm600mm
Bed
Air inlet
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Space Claim
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4. Geometry Space Claim Environment
Desktop
Structure menu
of the drawn
Geometry
Properties of
the selected
component
Tools provided in the Selected Tab
Different Tab
provided each for
a specific purpose
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5. Geometry Space Claim Environment
1- Draw the rectangular of the 2D in the x-z plate
2- Pull the surface and make a volume of the desired Geometry
2D model in xz plate
Pulling the surface in the y-
direction 100mm
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6. Mesh
• Generating the mesh using Ansys meshing machine
1- generate the default mesh for the model
2- use refinement or other options provided in the software depended
on your model
Ansys Meshing Machine
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7. Mesh Ansys Meshing Machine
Displaying defined Mesh
Outline of the project
(Mesh, Named
Selection, Contacts, …)
Details of the
defined Mesh
Details of the
defined Mesh :
Messages of Mesh
Warnings and Alerts of
the errors in the constructed mesh 7
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8. Mesh Ansys Meshing Machine
Right Click
Sizing a specific part differently from the defined mesh
Meshing properly in the Contact regions (interface of two different bodies)
Refinement of the Mesh
Meshing a Surface in the model (Differently or a surface that
has been missed )
Inflation of the surface mesh
Editing the Nodes
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9. Mesh Refinement
Refinement Ratio
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10. Mesh Selection Name
1 2
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11. Setup Fluent
Console Commands
Model
General model information
Model outline
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12. Setup Fluent
Models defined to be coupled
Depends on the required Multiphase model
Eulerian Parameters
In Eulerian model
Implicit or Explicit Solution
of Volume Fraction
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13. Setup Multiphase - Eulerian Model
Determining the
properties of the discrete
phase particles using the
different model and
theories defined in the
ANSYS Fluent
Granular Temperature Model
phase model (Granular or packed bed)
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Size of the particles
(Nano-particle)

14. Setup Multiphase - Eulerian Model
• Phase Interactions
Defining various options for
multiphase calculations
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15. Setup Boundary Conditions
Inlet condition: velocity 1
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16. Setup Boundary conditions
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Right Click
Menu  Type
(Defining the type of
boundary condition)
 outflow for outlet
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17. Setup Methods of Calculation
Approach of calculating the
momentum equations
The mathematical approach to calculate gradient numerically
The mathematical approach to calculate Pressure equation
The mathematical approach to calculate Momentum Scheme
The mathematical approach to calculate Volume Fraction
equation
The unsteady-State scheme of calculation
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18. Setup Calculation Controls
Relaxation Factor in SIMPLE algorithm
for Pressure correction Equation
Relaxation Factor in SIMPLE algorithm
for Momentum Equations
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19. Setup Defining a region (Bed of particles)
Defining the Bed in the Fluidized
Bed Column
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2 3
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20. Setup Initialization and Patch
Initialization method (Hybrid is default and
standard can be specified by the user)
Compute from: gives each node in the model a first
approximation based on the option you choose
Initial Values of different variables
(the approximation of the first guess)
Initialize and patch options of the initialization
procedure
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21. Setup Initialization of bed (Patch )
Phase
The specific Variable of the bed
that user wants to initialize
Value of the target variable
Determining which Defined region
to be patched
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22. Setup Run (Calculate)
Defining the appropriate residuals for
the model
Convergence criteria for the
model
Time step size for unsteady analysis
Number of time steps for the model Calculate button
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23. Results post- processing
Outline of the model
(Surfaces, Contours,
Volume Rendering)
The properties of
the selected
component in the
above part
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24. • Drawing the plate, line or a point to determine or analysis a variable through that location
Results post- processing
Defining a plane, line or point in the
model using a x,y,z coordinates
Options of the post
processing part in the tab
Specifying the Plane and
the distance in the third
plane and the type of plane
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25. Results post- processing
• Different visualization techniques for post processing Visualized results
and its legend
The different options
(Contours, Charts,
Volume Rendering)
Determing which
variable and at
what location it
displays
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26. Thanks for your attention ! 
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