F-DEMPack Tutorial 2: Annular pipe

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==Introduction==
 
==Introduction==
 
Before starting with this tutorial, the user is strongly encouraged to follow
 
Before starting with this tutorial, the user is strongly encouraged to follow
the [[D-DEMPack Tutorial 2: Conveyor belt]] to get a feeling of how the problem type works, and in particular the DEM section. This tutorial will focus mainly in the Fluid section and its particularities.
+
the [[G-DEMPack Tutorial 1: Conveyor belt]] to get a feeling of how the problem type works, and in particular the DEM section. This tutorial will focus mainly in the Fluid section and its particularities.
  
 
==Geometry==
 
==Geometry==
 
The process should start by creating a new geometry from scratch, by modifying an existing one or by opening a finished one. It is assumed that the user already knows how to do this procedure so no details will be given about it.
 
The process should start by creating a new geometry from scratch, by modifying an existing one or by opening a finished one. It is assumed that the user already knows how to do this procedure so no details will be given about it.
  
In this tutorial, a simple geometry was created for the sake of simplicity. The idea is to understand all the steps involved in the problem type. The user must start by downloading the file [[File:F DEMPack2 Tutorial 6.gid.zip]], which contains the geometry and mesh of the proposed geometry. This file has already created the groups that will be used in the simulation.
+
In this tutorial, a simple geometry was created for the sake of simplicity. The idea is to understand all the steps involved in the problem type. The user must start by downloading the file [[File:F_DEMPack_Tutorial_1.gid.zip]], which contains the geometry and mesh of the proposed geometry. This file has already created the groups that will be used in the simulation.
  
[[File:F-DEM_Tutorial6_Geometry.png|350px]]
+
[[File:F-DEM_Tutorial6_Geometry.png|300px]]
  
 
The geometry of study consists of an annular tube through which a flux of an intermediate viscosity mud passes. An inlet creating DEM particles with time is located in the base of the annular pipe.
 
The geometry of study consists of an annular tube through which a flux of an intermediate viscosity mud passes. An inlet creating DEM particles with time is located in the base of the annular pipe.
  
===DEM group===
+
==Groups==
 
+
 
The downloaded file has already created the groups that will be used in the simulation.
 
The downloaded file has already created the groups that will be used in the simulation.
  
[[File:F-DEM_Tutorial6_Groups.jpg|350px]]
+
[[File:F-DEM_Tutorial6_Groups.jpg.png|300px]]
 +
 
 +
In this sample case, the following five groups were created: ''Dem_inlet, Fluid, Inlet, No_slip'' and ''Outlet''. The lower circle (surface) would be the Inlet, the smaller one just on top of it was the DEM_Inlet, the circle at the top would represent the Outlet, the No_slip would be the walls of the cylinder and, finally, the volume named Fluid would constitute the mass of fluid.
  
In this sample case, the following five groups were created: Dem_inlet, Fluid, Inlet, No_slip and Outlet. The lower circle (surface) would be the Inlet, the smaller one just on top of it was the DEM_Inlet, the circle at the top would represent the Outlet, the No_slip would be the walls of the cylinder and, finally, the volume named Fluid would constitute the mass of fluid.
 
  
 
==Materials==
 
==Materials==
The Materials section in F-DEMPack contains the material data for both DEM and
+
===Fluid properties===
fluid elements. See the next figure for an overview of that section:
+
We will continue by defining the properties of the fluid in the simulation. We just have to click on the icon showing in the next figure to open the menus and in particular the Materials tab:
  
[[File:DEM 2 tutorial swimming materials section.png|300px]]
+
[[File:F-DEM_Tutorial6_MatIcon.png]]
  
The DEM part is identical to D-DEMPack, and a full explanation of every aspect
+
To begin inserting the fluid properties, we click on ''Fluid'' and then on the plus button at the bottom of the window to add a new Fluid material.  
in it can be found in the corresponding links given above. In this case,
+
though, an additional section for the Fluid part exists, where the user can
+
set the values of some fundamental fluid properties, as for example density,
+
viscosity, bulk modulus or rheological characteristics.
+
  
===DEM-FEM wall group===
+
[[File:F-DEM Tutorial6 AddMat.png]]
[[File:DEM 2 tutorial swimming DEM FEM group.png|300px]]
+
  
The parameters in this section are identical to those in the D-DEMPack problem
+
The next figure shows the details of the fluid material parameters that have been used in this example. To fill in or modify the value of the parameters, just unfold the ''General'' and ''Fluid'' submenus and double-click on the corresponding current data. The following data corresponds to an intermediate viscosity mud.
type, so no extra information is necessary in this case.
+
  
===Inlet DEM group===
+
[[File:F-DEM_Tutorial6_FluidMat.PNG]]
[[File:DEM 2 tutorial swimming DEM inlet group.png|300px]]
+
  
See [[D-DEMPack Tutorial 2: DemPack 2.0]] for details. It is important to
+
===DEM properties===
note that it is still not possible to create neither clusters nor
+
The same process can be followed, in this case, for the DEM material. We unfold the DEM-Defaultmaterial submenu at the bottom of the same window and fill the fields with the appropriate data. See Figure 6.
nanoparticles from an inlet entity. This aspect of the code is still under
+
development.
+
  
===DEM Initial Conditions===
+
[[File:F-DEM_Tutorial6_DEMMat.PNG]]
[[File:DEM 2 tutorial swimming DEM Initial Conditions.png|300px]]
+
  
This section is also identical to its counterpart in D-DEMPack, so no further
 
explanations are needed.
 
  
==Materials==
+
==General Application Data==
The Materials section in F-DEMPack contains the material data for both DEM and
+
We now need to tell the program the model characteristics: boundary and initial conditions, inlet options, time considerations, etc. To begin filling all this data, we just click on the ''Model'' menu located at the left of the ''Materials'' tab and the Model Properties window will show up. This menu can be accessed also by clicking on the icon showing in the next figure:
fluid elements. See the next figure for an overview of that section:
+
  
[[File:DEM 2 tutorial swimming materials section.png|300px]]
+
[[File:F-DEM_Tutorial6_PropsIcon.png]]
  
The DEM part is identical to D-DEMPack, and a full explanation of every aspect
+
The first section of the menu is General Application Data. Within this section the user can specify the simulation parameters, the coupling parameters between both subdomains -fluid and DEM particles-, and some postprocess results options. A deeper explanation of those parameters can be found in [[F-DEMPack2 manual]].
in it can be found in the corresponding links given above. In this case,
+
though, an additional section for the Fluid part exists, where the user can
+
set the values of some fundamental fluid properties, as for example density,
+
viscosity, bulk modulus or rheological characteristics.
+
  
==DEM-Fluid Interaction Settings==
+
[[File:F-DEM Tutorial6 GeneralData.PNG]]
Most of the interaction parameters between the DEM spheres and fluid are
+
inside the General Application Data section, whose overview is given next:
+
  
[[File:DEM 2 tutorial swimming general application data.png|450px]]
+
The previous screenshot shows the reference parameters that have been used in this particular case.
  
Some of the parameters in this tree are very straightforward, as for example
 
the duration time, the output delta time, the number of threads to use in
 
the simulation or the gravity vector. Others, though, carry a higher
 
difficulty and are mostly related to the way the two subdomains interact. A
 
deeper explanation of those parameters can be found in [[F-DEMPack2 manual]]. The previous screenshot has been given to the user as a reference as
 
well as a guide for choosing some default values that give good results in
 
this particular case. This tree also includes the Results section, which is pretty straightforward.
 
  
==Fluid==
+
==DEM Entities==
This section contains the information about the properties of the fluids, the
+
The entities and conditions in relation to the DEM part of the problem are already preassigned so the user does not have to bother and can concentrate on the fluid aspects and details of the simulation. Nevertheless, figures showing the details on the DEM parts will be added here for the sake of completion and as a reference should the user lose these settings or in the case of have any problem when loading the file.
different existing fluid elements and, when necessary, their assigned
+
conditions. It also has some parameters in relation to the settings of the
+
fluid solver. The figure that follow shows an overview of this section:
+
  
[[File:DEM 2 tutorial swimming fluid menu.png|250px]]
+
===DEM-FEM wall group===
 +
The outer and inner cylinders are defined as walls in this section (''No-Slip'' group). No motion is imposed on any of them.  
  
The screenshot shows the chosen parameters in this example. The user is
+
[[File:F-DEM Tutorial6 DEM-FEM wall.PNG]]
encouraged to play a little bit to those values and see the results. In this
+
case a monolithic solver was chosen to get more accurate results but no
+
turbulence model was considered necessary. The linear solver parameters
+
require a much deeper understanding of the underlying theory and the
+
associated numerical methods and will not be discussed here, check for more
+
information. The default parameters in the problem type gave good results in
+
this particular case. Finally, the user can enter the desired computational
+
time step, which does not have to be too small as long as stable simulations
+
are obtained.
+
===Properties===
+
In this section, the user can create a Property related with each of the
+
fluids in the problem. In order to do this, the corresponding fluid must have
+
been previously created in the Materials section. The next picture shows the
+
process:
+
  
[[File:DEM 2 tutorial swimming Fluid Properties.png|250px]]
+
===Inlet DEM group===
 +
The annular surface over the base of the annurar pipe is set as the inlet of DEM particles. A total of 1000 particles per second are generated with an initial velocity of 1.5 m/s on the longitudinal direction of the pipe. The DEM material of the particles is specified in this submenu, as well as their diameter.
  
In this particular case, the Water default material was assigned to the
+
[[File:F-DEM Tutorial6 Inlet.PNG]]
Property1, which is good enough in this sample simulation.
+
  
===Elements===
+
===General options===
The user must specify the fluids that will be present in the problem, so the
+
This section is devoted to set the limits of the bounding box, the gravity vector and some advanced features. The figure that follows shows the chosen parameters.
next step is to assign the desired groups to the Fluid Elements. The process
+
is the same as in other tutorials. A screenshot is given next:
+
  
[[File:DEM 2 tutorial swimming Elements Fluid.png|250px]]
+
[[File:F-DEM Tutorial6 DEMGeneralOpt.PNG]]
  
To finish the elements assignation, though, an additional step is
+
===Solution strategy===
necessary. The user must specify the FEM element type to be used in the fluid
+
Other advanced options that the user can specify are those related to the ''Solution strategy'' and ''DEM-Specific Results''. More information about these submenus can be found in [[F-DEMPack2 manual]].
mesh and the corresponding Property. The next figure shows this:
+
  
[[File:DEM 2 tutorial swimming Elements Fluid Property.png|250px]]
+
[[File:F-DEM Tutorial6 DEMSolStrategy.PNG]]
  
In this case, the only available element in 3D is the tetrahedra, while the
+
==Fluid==
chosen property was number 1, corresponding to the Water material.
+
This section contains the information about the properties of the fluids, the different existing fluid elements and, when necessary, their assigned conditions. It also has some parameters in relation to the settings of the fluid solver.
  
===Conditions===
+
The first two submenus are related to the solver type for the fluid part and its parameters, and the third sumbenu allows the user to enter the delta time to use in the computations of the fluid as well as the step for the divergence clearance.
We finish the process by assigning the necessary conditions to their
+
corresponding groups.
+
====Initial Conditions====
+
The fluid solver needs some initial conditions in the fluid to solve the
+
problem. The next figure shows the section:
+
  
[[File:DEM 2 tutorial swimming Initial Conditions.png|200px]]
+
The default parameters on the next figure gave good results in this particular case.
  
For this simulation, an initial vertical value of 1m/s was assigned to the
+
[[File:F-DEM Tutorial6 FluidData1.PNG]]
mass of fluid inside the tube. In this case, no initial pressure was necessary.
+
  
====Boundary Conditions====
+
===Properties===
*''Inlet velocity''
+
The user can set the fluid properties by assigning them to the Fluid material previously created. To do this, right-click on ''Properties'' and choose New. A New Property window will appear below. ''Fluid1'' can be selected on the ''Material'' drop-down menu.
An inlet velocity is necessary in this simulation for a flow to exist in time
+
 
along the interior of the tube. See the next picture:
+
[[File:F-DEM Tutorial6 FluidProperties.PNG]] [[File:F-DEM Tutorial6 FluidProperties2.PNG]]
 +
 
 +
===Elements===
 +
 
 +
The next step is to identify the fluid elements amongst all the existing geometric entities. This can be done by going to Elements and right-click on Fluid. As before, if the user clicks on ''New'' a window will open at the bottom. The working fluid can be selected on the ''Group'' drop-down menu. The elements are properly assigned after clicking on ''Ok''.
 +
 
 +
*''Important remarks''
 +
**'''Make sure a property has been created before assigning the fluid element.'''
 +
 
 +
[[File:F-DEM Tutorial6 FluidElements.PNG]] [[File:F-DEM Tutorial6 FluidElements2.PNG]]
 +
 
 +
===Initial conditions===
 +
The same procedure is followed to assign the initial conditions to the problem. In this case, an initial vertical velocity field of 1.5 m/s  is given to the mass of fluid. The picture that follows shows the process.
 +
 
 +
[[File:DEM 2 tutorial swimming Initial Conditions.png|200px]]
  
[[File:DEM 2 tutorial swimming inlet group.png|200px]]
+
====Boundary conditions====
 +
Regarding the boundary conditions, an inlet velocity of 1.5 m/s is proposed to be set in the entrance of the annular pipe. This can be done by right-clicking on ''Boundary_conditions'' >'' Inlet_velocity'' and creating the new inlet condition over the desired group. As seen in the next picture, a velocity of 1.5 is specified in the vertical direction.
  
A vertical constant flow of 1m/s entering the bottom opening of the tube was
+
A similar process is followed to impose the pressure boundary condition. In this example it is assigned a null pressure value at the top surface.
chosen. No Outlet Pressure was needed in the simulation.
+
*''No-Slip''
+
The user must tell the program if there exists any relative velocity between
+
the fluid and the solid boundary. The capture that follows shows the section:
+
  
[[File:DEM 2 tutorial swimming No Slip.png|200px]]
+
To finish with the boundary conditions, slip conditions are informed in the domain. In this case, no-slip conditions have been chosen on the cylinder walls. As shown in the figure that follows, the user must assign this property to the appropriate layer, in this case the outer and inner cylinders of the annular pipe.
  
For this example, a no-slip behaviour was given to the walls. If there had
+
[[File:F-DEM Tutorial6 BoundCondFluid.PNG]]
been additional DEM-FEM entities, an Is-Slip behaviour could have been given
+
to them.
+
  
 
==Meshing and Running==
 
==Meshing and Running==
If the user has succesfully assigned to the corresponding groups all the
+
The last step before launching the calculation is to mesh the domain. All the mesh characteristics are predefined on the downloaded model, so the user can proceed to mesh by typing Ctrl+G or by unfolding the ''Mesh'' menu on the top of GiD and clicking on ''Generate Mesh...''. A size of 0.05 has been selected for the mesh.
previous Properties, Elements and Conditions, the only thing that is still
+
missing is the computational mesh. As already said, all the messing
+
characteristics has been previously set in this problem, so the user has been
+
able to focus in the Fluid aspects of the problem type. So to mesh, hit Ctr-G
+
and enter a value of 0.02 and press OK. A global view of the resulting mesh
+
should be similar to this one:
+
  
[[File:DEM 2 tutorial swimming mesh.png|350px]]
+
[[File:F-DEM Tutorial6 Mesh.png|300px]]
  
On the other hand, the initial DEM spheres mesh should look like the
+
==Calculate==
following:
+
After the geometry is successfully meshed and the case is saved, the user is now ready to launch the calculation. To do this, the user must go to ''Calculate > Calculate'' or press the ''Run the simulation'' button in the interface. The next figure shows the Process Management section of the interface.
  
[[File:DEM 2 tutorial swimming mesh DEM detail.png|350px]]
+
[[File:F-DEM Tutorial6 ProcessMenu.PNG]]
  
While the inlet surface mesh should be very similar to this:
+
The first button inside the red square opens the process control window, the second one runs the simulation, the third one gives information about the calculations and the last one stops the process.
  
[[File:DEM 2 tutorial swimming mesh DEM inlet detail.png|350px]]
 
  
 
==Results==
 
==Results==
Once a mesh is obtained and the file saved, the simulation can be run. To
+
Once the program starts writing results, the user can shift to the Postprocess in order to analyze the obtained results. After clicking on ''Open multiple files'' and selecting the desired group of files to be opened, the user can observe the sequence of results with time by using the ''Window > Animate'' utility. Next figures show a succession of results after running the sample case.
start the computations, the user must only hit F5 and the simulation will begin.
+
 
The next four captures show the resulting simulation at different times:
+
[[File:F-DEM Tutorial6 Post1.PNG|200px]] [[File:F-DEM Tutorial6 Post2.PNG|180px]] [[File:F-DEM Tutorial6 Post3.PNG|180px]] [[File:F-DEM Tutorial6 Post4.PNG|200px]]
  
[[File:DEM 2 tutorial swimming velocities1of4.png|300px]]
+
It is also possible to print several physical results as, for example, the velocity field of the particles or the fluid pressure distrubution on a determinated step of time. To do this, the user must click on ''View results > Display vectors > VELOCITY > |VELOCITY|'', and ''View results > Contour Fill > PRESSURE > |VELOCITY|''.
[[File:DEM 2 tutorial swimming velocities2of4.png|300px]]
+
[[File:DEM 2 tutorial swimming velocities3of4.png|300px]]
+
[[File:DEM 2 tutorial swimming velocities4of4.png|300px]]
+
  
The next figure shows the stationary pressure field in the fluid:
+
[[File:F-DEM Tutorial6 PostVel.PNG|300px]] [[File:F-DEM_Tutorial6_PostPres.PNG|300px]]
  
[[File:DEM 2 tutorial swimming fluid pressure.png|300px]]
 
  
The user can also make a cut in the mass of fluid and obtained a 2D view of
 
the velocity field in the fluid:
 
  
[[File:DEM 2 tutorial swimming fluid velocities.png|300px]]
+
==Additional DEM Tutorials==
 +
Other tutorials can be found [http://kratos-wiki.cimne.upc.edu/index.php/DEMPack_Tutorials here].

Latest revision as of 10:34, 19 November 2018

Contents

Introduction

Before starting with this tutorial, the user is strongly encouraged to follow the G-DEMPack Tutorial 1: Conveyor belt to get a feeling of how the problem type works, and in particular the DEM section. This tutorial will focus mainly in the Fluid section and its particularities.

Geometry

The process should start by creating a new geometry from scratch, by modifying an existing one or by opening a finished one. It is assumed that the user already knows how to do this procedure so no details will be given about it.

In this tutorial, a simple geometry was created for the sake of simplicity. The idea is to understand all the steps involved in the problem type. The user must start by downloading the file File:F DEMPack Tutorial 1.gid.zip, which contains the geometry and mesh of the proposed geometry. This file has already created the groups that will be used in the simulation.

F-DEM Tutorial6 Geometry.png

The geometry of study consists of an annular tube through which a flux of an intermediate viscosity mud passes. An inlet creating DEM particles with time is located in the base of the annular pipe.

Groups

The downloaded file has already created the groups that will be used in the simulation.

F-DEM Tutorial6 Groups.jpg.png

In this sample case, the following five groups were created: Dem_inlet, Fluid, Inlet, No_slip and Outlet. The lower circle (surface) would be the Inlet, the smaller one just on top of it was the DEM_Inlet, the circle at the top would represent the Outlet, the No_slip would be the walls of the cylinder and, finally, the volume named Fluid would constitute the mass of fluid.


Materials

Fluid properties

We will continue by defining the properties of the fluid in the simulation. We just have to click on the icon showing in the next figure to open the menus and in particular the Materials tab:

F-DEM Tutorial6 MatIcon.png

To begin inserting the fluid properties, we click on Fluid and then on the plus button at the bottom of the window to add a new Fluid material.

F-DEM Tutorial6 AddMat.png

The next figure shows the details of the fluid material parameters that have been used in this example. To fill in or modify the value of the parameters, just unfold the General and Fluid submenus and double-click on the corresponding current data. The following data corresponds to an intermediate viscosity mud.

F-DEM Tutorial6 FluidMat.PNG

DEM properties

The same process can be followed, in this case, for the DEM material. We unfold the DEM-Defaultmaterial submenu at the bottom of the same window and fill the fields with the appropriate data. See Figure 6.

F-DEM Tutorial6 DEMMat.PNG


General Application Data

We now need to tell the program the model characteristics: boundary and initial conditions, inlet options, time considerations, etc. To begin filling all this data, we just click on the Model menu located at the left of the Materials tab and the Model Properties window will show up. This menu can be accessed also by clicking on the icon showing in the next figure:

F-DEM Tutorial6 PropsIcon.png

The first section of the menu is General Application Data. Within this section the user can specify the simulation parameters, the coupling parameters between both subdomains -fluid and DEM particles-, and some postprocess results options. A deeper explanation of those parameters can be found in F-DEMPack2 manual.

F-DEM Tutorial6 GeneralData.PNG

The previous screenshot shows the reference parameters that have been used in this particular case.


DEM Entities

The entities and conditions in relation to the DEM part of the problem are already preassigned so the user does not have to bother and can concentrate on the fluid aspects and details of the simulation. Nevertheless, figures showing the details on the DEM parts will be added here for the sake of completion and as a reference should the user lose these settings or in the case of have any problem when loading the file.

DEM-FEM wall group

The outer and inner cylinders are defined as walls in this section (No-Slip group). No motion is imposed on any of them.

F-DEM Tutorial6 DEM-FEM wall.PNG

Inlet DEM group

The annular surface over the base of the annurar pipe is set as the inlet of DEM particles. A total of 1000 particles per second are generated with an initial velocity of 1.5 m/s on the longitudinal direction of the pipe. The DEM material of the particles is specified in this submenu, as well as their diameter.

F-DEM Tutorial6 Inlet.PNG

General options

This section is devoted to set the limits of the bounding box, the gravity vector and some advanced features. The figure that follows shows the chosen parameters.

F-DEM Tutorial6 DEMGeneralOpt.PNG

Solution strategy

Other advanced options that the user can specify are those related to the Solution strategy and DEM-Specific Results. More information about these submenus can be found in F-DEMPack2 manual.

F-DEM Tutorial6 DEMSolStrategy.PNG

Fluid

This section contains the information about the properties of the fluids, the different existing fluid elements and, when necessary, their assigned conditions. It also has some parameters in relation to the settings of the fluid solver.

The first two submenus are related to the solver type for the fluid part and its parameters, and the third sumbenu allows the user to enter the delta time to use in the computations of the fluid as well as the step for the divergence clearance.

The default parameters on the next figure gave good results in this particular case.

F-DEM Tutorial6 FluidData1.PNG

Properties

The user can set the fluid properties by assigning them to the Fluid material previously created. To do this, right-click on Properties and choose New. A New Property window will appear below. Fluid1 can be selected on the Material drop-down menu.

F-DEM Tutorial6 FluidProperties.PNG F-DEM Tutorial6 FluidProperties2.PNG

Elements

The next step is to identify the fluid elements amongst all the existing geometric entities. This can be done by going to Elements and right-click on Fluid. As before, if the user clicks on New a window will open at the bottom. The working fluid can be selected on the Group drop-down menu. The elements are properly assigned after clicking on Ok.

  • Important remarks
    • Make sure a property has been created before assigning the fluid element.

F-DEM Tutorial6 FluidElements.PNG F-DEM Tutorial6 FluidElements2.PNG

Initial conditions

The same procedure is followed to assign the initial conditions to the problem. In this case, an initial vertical velocity field of 1.5 m/s is given to the mass of fluid. The picture that follows shows the process.

DEM 2 tutorial swimming Initial Conditions.png

Boundary conditions

Regarding the boundary conditions, an inlet velocity of 1.5 m/s is proposed to be set in the entrance of the annular pipe. This can be done by right-clicking on Boundary_conditions > Inlet_velocity and creating the new inlet condition over the desired group. As seen in the next picture, a velocity of 1.5 is specified in the vertical direction.

A similar process is followed to impose the pressure boundary condition. In this example it is assigned a null pressure value at the top surface.

To finish with the boundary conditions, slip conditions are informed in the domain. In this case, no-slip conditions have been chosen on the cylinder walls. As shown in the figure that follows, the user must assign this property to the appropriate layer, in this case the outer and inner cylinders of the annular pipe.

F-DEM Tutorial6 BoundCondFluid.PNG

Meshing and Running

The last step before launching the calculation is to mesh the domain. All the mesh characteristics are predefined on the downloaded model, so the user can proceed to mesh by typing Ctrl+G or by unfolding the Mesh menu on the top of GiD and clicking on Generate Mesh.... A size of 0.05 has been selected for the mesh.

F-DEM Tutorial6 Mesh.png

Calculate

After the geometry is successfully meshed and the case is saved, the user is now ready to launch the calculation. To do this, the user must go to Calculate > Calculate or press the Run the simulation button in the interface. The next figure shows the Process Management section of the interface.

F-DEM Tutorial6 ProcessMenu.PNG

The first button inside the red square opens the process control window, the second one runs the simulation, the third one gives information about the calculations and the last one stops the process.


Results

Once the program starts writing results, the user can shift to the Postprocess in order to analyze the obtained results. After clicking on Open multiple files and selecting the desired group of files to be opened, the user can observe the sequence of results with time by using the Window > Animate utility. Next figures show a succession of results after running the sample case.

F-DEM Tutorial6 Post1.PNG F-DEM Tutorial6 Post2.PNG F-DEM Tutorial6 Post3.PNG F-DEM Tutorial6 Post4.PNG

It is also possible to print several physical results as, for example, the velocity field of the particles or the fluid pressure distrubution on a determinated step of time. To do this, the user must click on View results > Display vectors > VELOCITY > |VELOCITY|, and View results > Contour Fill > PRESSURE > |VELOCITY|.

F-DEM Tutorial6 PostVel.PNG F-DEM Tutorial6 PostPres.PNG


Additional DEM Tutorials

Other tutorials can be found here.

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