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  • WORKSHOP - Wind and Solar Heating
    Management Dialog then double click the WIND object and open the attributes dialog Set Use weather data file to Yes then click the new button Configure file To select the weather file to be used click the name of the file in this case NOTSET as no file has been chosen yet In the file browser browse to phoenics d polis d wkshp windsun and select the file GBR London Gatwick 037760 EWEC epw If you have chosen to download the file yourself go to the folder where you have saved it Change the Month to May Set the date and time to 1 May 17 00 Note how the wind direction wind speed air temperature ground temperature and atmospheric pressure all update to the new values Click OK Once again the data values are updated The input boxes are all grayed out the values can only be changed by clicking Configure file and selecting a different date and time If Use weather file were now set back to No the data input boxes would become live whilst retaining the new values Leave the weather file set to Yes and click OK twice to close the Wind object dialogs Modify the SUN Double click the SUN object and open its attributes dialog The sun object is sharing the weather file with the wind object and is already configured for the same date and time If the date and time are changed here the wind object will automatically pick up the same date and time as set here Click OK twice to close the Sun object dialogs Running the Solver In the PHOENICS VR environment click on Run Solver Earth and click on OK to confirm running Earth Using the VR Viewer In the PHOENICS VR environment click on Run Post processor then GUI Post processor VR Viewer Viewer Click OK on the file names dialog to accept the default files The shading can be checked by plotting contours of the variable LIT for the next few plots it is best to turn the contour averaging off click Select variable plot options on the handset or tool bar then on the Contours tab un tick Averaged Un averaged Contour of LIT at Z 6 25 Un averaged Contour of LIT at Y 71 25 The solar heat load can be checked by plotting contours of QS2 Un averaged Contour of QS2 at Z 3 75 Un averaged Contour of QS2 at Y 71 25 From these images we can see that the shadow is behind the building as expected In the shadow zone only the diffuse heating is applied The heat load is applied in the first layer of cells inside the solids The flow field outside the building should be like this with contour averaging turned on The temperature field with contour averaging turned off is like this Qualitatively this is correct in that the sun facing sides of the building are much hotter than the shadowed sides However the

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/windsun/windsun2.htm (2016-02-15)
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  • WORKSHOP - Flow Over Heated Bricks
    set the Position of object as Xpos 0 15 Ypos 0 45 Zpos 0 2 Click on General The Type is Blockage Click on Attributes and define the material as BRICK go to OTHER MATERIALS SOLID then to BRICK Click on Adiabatic and select Fixed Heat Flux Set the heat flux to 30 W Click on OK to close the Attributes menu Click on OK to close the Object Dialogue Box Create the remaining bricks by arraying Check that the first brick built is still selected and appears with white contours if not select it from the list in the Object management Dialog Now click on the Duplicate using array button or select Object Array object from the Object Management Dialog menu bar In either case in the new dialogue box set Direction Dimension Pitch X 4 0 2 Y 1 0 0 Z 1 0 0 Click on OK to exit from the Array Dialogue Box A row of bricks with the same attributes appears in the domain Create the fluid inlet Click on Object New New object Change name to INLET Click on Size to set the SIZE of object as Xsize 0 4 Ysize 0 5 Zsize 0 0 Click on Place to set the Position of object as Xpos tick at end Ypos tick at end Zpos 0 0 Click on General and define Type Outlet Click on Attributes to define the external conditions Set the External turbulence to User set and leave the default values This will give a turbulent viscosity roughly the same as laminar Leave the temperature at ambient 20 degrees C for the inflow Click on OK to close the Attributes menu and on OK in the Object Dialogue Box Create the fluid outlet Click on Object New New object Change name to OUTLET Click on Size to set the SIZE of object as Xsize 0 4 Ysize 0 5 Zsize 0 0 Click on Place to set the Position of object as Xpos 0 0 Ypos 0 0 Zpos tick at end Click on General and define Type Outlet Leave the default values in the Attributes dialogue box Click on OK to exit from the Object Dialogue Box Setting the Probe Location Before running the solver it is a good idea to place the probe in a suitable place to monitor the convergence of the solution Too close to an inlet and the value will settle down very quickly before the rest of the solution Placed in a recirculation zone it may still show traces of change even though the bulk solution is converged In this case somewhere under the dividing plate is fine Click on the probe icon on the toolbar or double click the probe itself and move the probe to X 0 5 Y 0 5 Z 0 3 Set the grid Click on the Mesh toggle button The default mesh will appear on the screen The orange lines are region lines and denote the edges of the

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/bricks.htm (2016-02-15)
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  • WORKSHOP - Conjugate Heat Transfer
    File Load from Libraries enter 274 in the Case Number data entry box and click OK In the VR Editor Turn Solution of the Energy Equation ON Click on Main menu Models and Energy Equation Select Temperature Click on Properties switch Use property tables ON Set the domain material to Gases 0 Air at 20 deg C Set the Reference pressure to 1E5 Pa Change the temperature units from Kelvin to Centigrade From now on all temperatures will be in degrees C Set the Ambient temperature to 20 and leave the ambient pressure at 0 relative to the Reference pressure Turn initialise from ambient ON Click Top Menu then OK to leave the main menu Set Physical Properties for Blockages Click on Obj button on the main control panel to bring up the Object management dialog box Select BODY1 in the list then with the shift key held down select RWHL This will select all the blockages Right click and select Open object dialog Click on Attributes Types Solids OK select any solid say Aluminium and click OK three times Click YES to propagate the change to all selected blockages Set Thermal Boundary Conditions Double click on the UPSTR object click on Attributes The inlet temperature is Ambient 20 C Double click on the FWHL object then on Attributes Click on Adiabatic and select Fixed Heat Flux from the list of heat sources Set the heat source to 3000W Leave the other objects and the ROAD as adiabatic Running the Solver In the PHOENICS VR environment click on Run Solver Earth and click on OK to confirm running Earth Using the VR Viewer 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

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/wsconjht.htm (2016-02-15)
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  • WORKSHOP - Contaminants
    the following to XPos 0 35 YPos 0 0 ZPos 1 0 Double click on the duplicated object to bring up the Object specification dialog box Change Name to INL2 Click on Attributes Enter 0 0 in the data entry box next to Inlet value for C1 Click on OK Click on OK Create the OUTLET object Click on Settings New and New object Change name to OUTLET Click on Size and Place respectively to change the following to XPos 0 2 XSize 0 2 YPos 0 0 YSize 1 0 ZPos 0 0 ZSize 0 0 Click on Type dialogue box and select OUTLET Click on OK Click on OK Create the first Blockage Click on Settings New and New Object Change name to BLOCK1 Click on Size and Place respectively to change the following to XPos 0 0 XSize 0 3 YPos 0 0 YSize 1 0 ZPos 0 71 ZSize 0 02 Click on OK Create the second Blockage Click on Settings New and New Object Change name to BLOCK2 Click on Size and Place respectively to change the following to XPos 0 3 XSize 0 3 YPos 0 0 YSize 1 0 ZPos 0 44 ZSize 0 02 Click on OK Create the third Blockage Click on Settings New and New Object Change name to BLOCK3 Click on Size and Place respectively to change the following to XPos 0 0 XSize 0 3 YPos 0 0 YSize 1 0 ZPos 0 16 ZSize 0 02 Click on OK Set the grid Click on the Mesh toggle button The default mesh will appear on the screen The orange lines are region lines and denote the edges of the bounding boxes of each object The blue lines are ordinary grid lines introduced by the auto mesher This grid is adequate for the tutorial and does not need to be changed Set the remaining solution control parameters Click on Main menu Click on Numerics Change Total number of iterations to 300 Click on Top Menu OK Set the monitoring point Move Monitoring Point using the Position buttons to x 0 34 y 0 5 z 0 5 Running the Solver In the PHOENICS VR environment click on Run Solver Earth and click on OK to confirm running Earth Using the VR Viewer 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 Vectors click on the Vector toggle Contours click on the Contour toggle Streamlines click on the Create Streamline button Iso surfaces click on the Iso Surface toggle To select the plotting variable To select Pressure click on the Select Pressure button To select Velocity click on the Select Velocity button To select Temperature click on the Select Temperature button To select any other variable click on the Select a Variable button Select DEN1 for density or ENUL for laminar viscosity values To change the direction of the

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/wscontam.htm (2016-02-15)
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  • WORKSHOP - Editing Properties of the Domain Fluid
    User Click on OK OK Create WWALL2 object by duplication from WWALL1 Click on Duplicate button in the VR Editor and OK Move the new object to Zpos 0 Click twice on the new object and change the Name to WWALL2 Click on OK Create EWALL1 object by duplication from WWALL2 Click on Duplicate button in the VR Editor and OK Double click on the newly duplicated object Change the Name to EWALL1 Change the position and size of the new object to XPos tick At end XSize 0 05 YPos 0 0 YSize To end ZPos 0 35 ZSize 0 15 Click on OK Create EWALL2 object by duplication from WWALL2 Click on Duplicate button in the VR Editor and OK click twice in the newly duplicated object Change the Name to EWALL2 Change the position and size to XPos At end XSize 0 05 YPos 0 0 YSize To end ZPos 0 0 ZSize 0 15 Click on OK Create Upper Wedge WED1 Click on Object New New object Change Name to WED1 Click on Size to set the Size of object as XSize 0 15 YSize To end ZSize 0 13 Click on Place to set the Position of object as XPos 0 8 YPos 0 0 ZPos 0 35 Click on General and then Shape Click on Geometry dialogue box and select PUBLIC SHAPES WEDGE Click on Open Click on Attributes Click on Other materials then Solids and select 111 STEEL at 27 deg C Change the Heat transfer coeff setting from Wall function to User Click on OK Click on Options and Rotation options set value to 16 Click on OK OK Create Lower Wedge by duplication from WED1 Click on Duplicate button in the VR Editor and OK Click on the new object Change the Name to WED2 Change the position and size of the new object to XPos 0 8 XSize 0 15 YPos 0 0 YSize To end ZPos 0 02 ZSize 0 13 Click on Options and Rotation options Set the value to 2 Click on OK OK Create Upper Heat Source HEAT1 Click on Object New New object Change Name to HEAT1 Click on Size to set the Size of object as XSize 0 07 YSize To end ZSize 0 18 Click on Place to set the Position of object as XPos 0 2 YPos 0 0 ZPos 0 3 Click on General Click on Attributes Click on Other materials then Solids and select 103 COPPER at 27 deg C and then OK Set Heat Source to 50W Click on Adiabatic select Fixed heat flux and enter 50 for Value Change the Heat transfer coeff setting from Wall function to User Click on OK OK Create Lower Heat Source HEAT2 by duplication from HEAT1 Click on Duplicate button in the VR Editor and OK Click on twice on the new object Change Name to HEAT2 Click on Size and set the Size of the new object as XSize 0 07

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/wsdomprp.htm (2016-02-15)
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  • WORKSHOP - Using ASSEMBLY Objects
    body and wheel objects are objects 0 3 We must re order the list to bring the assembly object VAN above BODY1 Select the VAN assembly object and with the cursor over the Reference column click the right mouse button The following context menu should appear Click on Top to bring the VAN object to the very top of the list Add the components Double click on VAN to bring up the Object Specification Dialogue Box Click on Hierarchy then Add components A list of object will appear Click on BODY1 then with the shift key held down select RWHL All intermediate objects will be selected Click OK The Hierarchy dialog will now show that there are 4 components Click OK Click to the Options pane and tick the Hide object box to hide the assembly and on OK to close the Object Specification Dialogue Box The assembly object itself is merely a holder and does not need to be visible The Object Management Dialog will now show To reveal the components of the VAN assembly object click on View and select Assembly objects Bringing up the dialogs for any of the component objects wild show that the Place Size and Shape panes have disappeared The size and location of these objects is now controlled through the parent assembly The attributes of each component can still be set individually Saving the VAN as a POB file From the Object Management Dialog bring up the Object Specification Dialog for the VAN assembly object Click on Export Click on File name and enter myvan in the input box Click Save to close the file selector then OK to close the Export dialog Click OK to close the information dialog about the saving of the file Note that when the Size or Place

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/assem1.htm (2016-02-15)
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  • WORKSHOP - Angled Inlets and Outlets - 1
    object Select the CRATE1 object then click Object Copy object and OK to allow the copy The copied object will now be highlighted in the Object Management Dialog Double click it to open the Object attributes dialog Change name to CRATE2 Click on Place and set the X position to 6 5m Set the grid Click on the Mesh toggle button The default mesh will appear on the screen The orange lines are region lines and denote the edges of the bounding boxes of each object The blue lines are ordinary grid lines introduced by the auto mesher Click anywhere on the image and the Gridmesh settings dialog box will appear The grid in all three directions is set to Auto This gives 20 cells in X and Z and 1 cell in Y This will suffice for the tutorial though it would not be enough for a real calculation Click on OK to close the dialog box Click on Mesh toggle again to turn off the mesh display Set the remaining solution control parameters Click on Main Menu and then on Numerics The default number of iterations is 100 This is enough to test if a model is set up correctly but is hardly ever enough to obtain a converged solution Reset the total number of iterations to 500 Click on Top menu to return to the top menu Click on OK to exit the Main Menu Setting the Probe Location Before running the solver it is a good idea to place the probe in a suitable place to monitor the convergence of the solution Too close to an inlet and the value will settle down very quickly before the rest of the solution Placed in a recirculation zone it may still show traces of change even though the bulk solution is converged In this case somewhere in the middle of the domain is fine Click on the probe icon on the toolbar or double click the probe itself and move the probe to X 5 0 Y 0 5 Z 2 0 Running the Solver In the PHOENICS VR environment click on Run Solver Earth and click on OK to confirm running Earth Using the VR Viewer 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 Vectors click on the Vector toggle Vectors are coloured by the current plotting variable but their length is always related to the absolute velocity Contours click on the Contour toggle Streamlines click on the Streamline management button Iso surfaces click on the Iso Surface toggle To select the plotting variable To select Pressure click on the Select Pressure button To select Velocity click on the Select Velocity button To select Temperature click on the Select Temperature button To select any other variable click on the Select a Variable button To change the direction of the plotting plane set the slice direction

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/ang-in/ang-in1.htm (2016-02-15)
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  • WORKSHOP - Angled Inlets and Outlets - 2
    ANGLED OUT Note that the shape and size of the angled out object do not really matter what matters is the size and shape of the area of intersection between it and any blockage which it overlaps In this case the active outlet area will be the outer surface of the COLUMN object which lies within OUTLET Click Options and tick the Transparency box Click on OK to close the Object Specification Dialogue Box Set the grid Click on the Mesh toggle button The default mesh will appear on the screen The orange lines are region lines and denote the edges of the bounding boxes of each object The blue lines are ordinary grid lines introduced by the auto mesher Click anywhere on the image and the Gridmesh settings dialog box will appear The grid in all three directions is set to Auto This gives 20 cells in X Y and Z This will suffice for the tutorial though it would not be enough for a real calculation Click on OK to close the dialog box Click on Mesh toggle again to turn off the mesh display Set the remaining solution control parameters Click on Main Menu and then on Numerics The default number of iterations is 100 This is enough to test if a model is set up correctly but is hardly ever enough to obtain a converged solution Reset the total number of iterations to 200 Click on Output then Monitor graph style From the list select max abs corr The default convergence monitor draws a graph of the values of the solved variables at the probe the pencil seen in the graphics window position When the solution has converged the values here should stop changing The option chosen here causes a graph of largest corrections to be drawn The corrections should go to zero as convergence is reached Click on Top menu to return to the top menu Click on OK to exit the Main Menu Setting the Probe Location When monitoring the maximum correction the probe location is not important If we were using the default monitor mode it would be a good idea to place the probe in a suitable place to monitor the convergence of the solution Too close to an inlet and the value will settle down very quickly before the rest of the solution Placed in a recirculation zone it may still show traces of change even though the bulk solution is converged In this case somewhere in the middle of the domain is fine Click on the probe icon on the toolbar or double click the probe itself and move the probe to X 0 3 Y 0 3 Z 0 5 Running the Solver In the PHOENICS VR environment click on Run Solver Earth and click on OK to confirm running Earth Using the VR Viewer In the PHOENICS VR environment click on Run Post processor then GUI Post processor VR Viewer Click OK on the file names dialog to

    Original URL path: http://www.cham.co.uk/phoenics/d_polis/d_wkshp/ang-in/ang-in2.htm (2016-02-15)
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web-archive-uk.com, 2017-12-16