This workshop calculates the heat exchange in a duct flow with fixed wall temperatures. Two solid plates of different materials are placed in the duct.
The flow domain is shown below:-
From the system level:
To enter the PHOENICS-VR environment, click on the PHOENICS icon on the desktop, or click on Start, programs, PHOENICS, PHOENICS.
From the commander level:
To enter the PHOENICS-VR environment, click on the 'Run vre' icon in the left column.
In PHOENICS-VR environment,
Start with an 'empty' case - click on 'File' then on 'Start New Case', then on 'Core', then click on 'OK'; to confirm the resetting.
To enter VR Editor:
This is the default mode of operation .
Set the domain size, and activate solution of the required variables:
Click on 'Main menu'
Set 'A duct flow (Immersol)' as the Title.
Click on 'Geometry'
Change the domain size under z-direction to 0.5 m
Change the Number of cells in the both x- and z-direction to 30
Click on 'OK' to close the Grid mesh settings dialog
Click on 'Models'
Click Energy Equation to ON, select Temperature and click on OK
Click on Turbulence models, select KEMODL and click on OK
Click Radiation models to ON and select IMMERSOL. Click on OK
Click on IMMERSOL settings and:-
Enter 1.0 for the Absorption coefficient
Switch the 'Store Radiative energy fluxes' to ON
Click on 'Previous panel'
Set material properties for the fluid
Click on 'Properties'.
Click on domain material dialogue box/Gases/OK/2 Air using Ideal Gas Law, STP/OK
Click on 'Top menu' and 'OK'
Click 'Reset' on the Movement control panel, then 'Fit to window' to re-scale the view to fit the geometry.
Create INLET object
Click on 'Settings', 'New' and 'New Object'. The Object specification dialog box will appear.
Change Name to Inlet
Click on 'Size' and set SIZE of Object as:
XSize: 0.0
YSize: 1.0
ZSize: 0.5
Click on 'General'.
Click on Type dialogue box and select INLET
Click on Attributes and enter 727 ° C for the Temperature, 1.0 m/s for the x- direction velocity. Click on OK/OK
Create OUTLET object
Click on 'Settings', 'New' and 'New Object'.
Change Name to Outlet
Click on 'Size' and set SIZE of object as:
XSize: 0.0
YSize: 1.0
ZSize: 0.5
Click on 'Place' and set POSITION of object as:
XPos: 1.0
YPos: 0.0
ZPos: 0.0
Click on 'General'.
Click on Type dialogue box and select OUTLET
Click on Attributes and set the external Temperature to 727 ° C
Click on OK/OK
Create Lower WALL object
Click on 'Settings', 'New' and 'New Object'.
Change Name to Walll
Click on 'Size' and set SIZE of object as:
XSize: 1.0
YSize: 1.0
ZSize: 0.0
Click on 'General'.
Click on Type dialogue box and select PLATE
Click on Attributes.
Click on 'Adiabatic', and select 'Surface temperature', 'OK'. Set the surface temperature value to 727.
Set the emissivity to 0.9/OK
Click on OK
Create upper WALL object by duplication from lower wall
Click on the 'Duplicate object' button and then 'OK'
Use the Z Position button to move the duplicated object to the top of the domain.
Click on the object
Change the name to Wallh.
Click on Attributes, and set the surface temperature to 2227.
Click on OK/OK
Create upper internal blockage
Click on 'Settings', 'New' and 'New Object'.
Change Name to PLT1
Click on 'Size' and set SIZE of object as:
XSize: 0.4
YSize: 1.0
ZSize: 0.02
Click on 'Place' and set POSITION of object as:
XPos: 0.3
YPos: 0.0
ZPos: 0.35
Click on 'General'.
Click on Attributes.
Click on the Types dialogue box and select Solids/111 STEEL at 27 deg C/OK
Set emissivity to 0.9/OK
Click on OK
Create lower internal blockage by duplication from upper
Click on Duplicate object button and then 'OK'
Change the following to:
XPos: 0.3 ZPos: 0.13
double click on the duplicated object and change the name to PLT2
Click on Attributes.
Click on the Types Material dialogue box
Choose '103 COPPER at 27 deg C'/OK/OK
Click on 'OK' to close the object specification dialog box
Set remaining solution control parameters
Click on 'Main Menu'
Click on 'Initialisation'
Change FIINIT Value under TEM1 to 727
Click on 'Numerics'
Change 'Total number of iterations' to 200
Click on Top Menu/OK
Adjust the Monitoring Position to the center of the domain using the Z Position button.
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 'IMMERSOL ' (e.g.) and save as 'CASE1' (e.g.).