This workshop shows how to use a Fine Grid Volume to increase the local resolution. The case considered is the flow over a cylinder.
Start with an 'empty' case - click on 'File' then on 'Start New Case', then on 'Core', then click on 'OK'; to confirm the resetting.
Set domain size and activate solution of variables
Click on 'Main Menu'.
Set the title to 'Flow over a cylinder (FGEB)'
Click on 'Geometry'.
Set the Domain size to 8.0 m in X, 6.0 m in Y and 1.0 m in Z
Click 'OK' to close the Grid mesh settings dialog.
Click on the 'Reset' button on the movement control panel
Click on 'Fit to window' and 'OK'
Click on the 'Mouse' button and use mouse to rotate the view in X-Y plane.
Click on 'Models'.
Solution for velocities and pressure: ON
Turbulence models: Laminar
Click on 'Top menu'.
Click on OK.
Create blockage for CYLINDER
Click on 'Settings', 'New'and 'New Object';.
Name: Cyln
Click on 'Size' and enter:
Xsize: 0.6
Ysize: 0.6
Zsize: 1.0
Click on 'Place' and enter:
Xpos: 3.7
Ypos: 2.7
Zpos: 0.0
Click on 'General' and enter:
Type: BLOCKAGE
Click on 'Shape' and select the geometry: PUBLIC/SHAPES/cylinder
Click 'Options' and de-select 'Object affects grid'
Click on OK.
Create Fluid Inlet
Click on 'Settings', 'New' and 'New Object'.
Name: inlet
Click on 'Size' and enter:
Xsize: 0.0
Ysize: 6.0
Zsize: 1.0
Click on 'General'
Type: INLET
Click on 'Attributes'.
Set a velocity of 1.0 m/s in the x-direction.
Click on OK/OK.
Create fluid Outlet
Click on 'Settings', 'New' and 'New Object'.
Name: outlet
Click on 'Size' and enter:
Xsize: 0.0
Ysize: 6.0
Zsize: 1.0
Click on 'Place' and enter:
Xpos: 8.0
Ypos: 0.0
Zpos: 0.0
Click on 'General'
Type: OUTLET
Click on OK.
Create a Wall at the low side of the domain
Click on 'Settings', 'New', 'New Object'.
Name: Lwall
Click on 'Size' and enter:
Xsize: 8.0
Ysize: 0.0
Zsize: 1.0
Click on 'General'
Type: PLATE
Click on OK.
Create a Wall at the High side of the domain
Click on 'Settings', 'New', 'New Object'.
Name: Hwall
Click on 'Size' and enter:
Xsize: 8.0
Ysize: 0.0
Zsize: 1.0
Click on 'Place' and enter:
Xpos: 0.0
Ypos: 6.0
Zpos: 0.0
Click on 'General'
Type: PLATE
Click on OK.
Create the first Fine-grid volume
Click on 'Settings', 'New' and 'New Object'.
Name: fine1
Click on 'Size' and enter:
Xsize: 4.0
Ysize: 2.0
Zsize: 1.0
Click on 'Place' and enter:
Xpos: 2.0
Ypos: 2.0
Zpos: 0.0
Click on 'General'.
Type: FINE_GRID_VOL
Click on 'Attributes'.
Fineness X: 2
Fineness Y: 2
Fineness Z: 1
This will double the grid within the fine-grid object. You may click on the 'mesh toggle' button on the main controll panel to view the grid
Click on OK/OK.
Create the second Fine-grid volume
Click on 'Settings', 'New' and 'New Object'.
Name: fine2
Click on 'Size' and enter:
Xsize: 2.0
Ysize: 1.0
Zsize: 1.0
Click on 'Place' and enter:
Xpos: 3.0
Ypos: 2.5
Zpos: 0.0
Click on 'General'.
Type: FINE_GRID_VOL
Click on 'Attributes'.
Fineness X: 2
Fineness Y: 2
Fineness Z: 1
This will double again the grid within the fine-grid object. You may click on the 'mesh toggle' button on the main controll panel to view the grid
Click on OK/OK.
Setting the Probe Location
Click on the probe icon
on the toolbar or double-click the probe itself, and move the probe to X=7.0, Y=3.0, Z=0.5.
Set remaining solution control parameters
Click on 'Main menu'.
Click on 'Numerics'.
Total number of iterations: 250
Click on 'Top menu'.
Click on OK.
In the PHOENICS-VR environment, click on 'Run', 'Solver' (Earth), and click on 'OK'; to confirm running Earth.
In the PHOENICS-VR environment, click on 'Run', 'Post processor',then GUI Post processor (VR Viewer) . Click 'OK' on the file names dialog to accept the default files.
To view:
To select the plotting variable:
.
. Select DEN1 for density, or ENUL for laminar viscosity values. To change the direction of the plotting plane, set the slice direction to X, Y or Z 
To change the position of the plotting plane, move the probe using the probe position buttons
.
A typical plot from this case is:
In the PHOENICS-VR environment, click on 'Save as a case', make a new folder called 'Finegrid' (e.g.) and save as 'CASE1' (e.g.).